bluuebunny/crossref_metadata_2025 huggingface dataset:
The Implementation of Waste Sawdust in Concrete
Authors: Hu Jian
Published: June 2014

Implement the waste sawdust that has widely regarded as a partial sand replacement material to produce sawdust concrete. The replacement ratio are 0%, 3%, 5%, 7%, 10%, by using orthogonal test, analyzed the mechanical and heat preservation and heat insulation property and got an optimal replacement ratio. Besides, the deficiencies of this research have also been proposed.
Shear Strengthening Effects of RC Beams Using Aramid Plate Strip
Authors: Yoon Seung Joe , Ho Seung Woung , Kim Chang Sik , Gweon O Sang
Published: June 2014

For the strengthening material mainly used at construction sites, steel plate and fiber can be counted in general, and for the fiber case, a composite material like glass fiber, carbon fiber and aramid fiber for reinforcing is commonly used in concrete structures. For the end development method, only the development effect has been verified through experiments without providing an effective development design per FRP strengthening quantity on a tensile surface. This study acknowledges the strengthening effect through behaviors of each specimen and test results by performing tests on total 4 reinforced concrete beams with the strengthening quantity and its position as variables in order to evaluate the performance of the Peel-ply method using aramid fiber plate to increase bonding strength with the basic material concrete.
The Quickly Erected Buildings in Modern Construction
Authors: Beskorovainaia Olga Nikolayevna , Bychkov Dmitriy Sergeevich
Published: June 2014

Research is presented in article directed on the analysis of constructive and technical features of quickly erected buildings of the panel type developed in the 70th years. Shortcomings of considered designs were revealed. The solution of elimination of shortcomings of existing designs quickly erected buildings due to change of the design and application of a new material is proposed. Application of a new material allows decrease in a body weight of bearing designs, change of a form of section of a design and elimination of "the cold bridge".
Microstructure and Mechanical Properties of Laminated Mg-Based Composites
Authors: Xue Guang Ji , Wang Shou Ren , Li Ping , Qiao Yang , Han Ying
Published: June 2014

A new design method to achieve the laminated Ti-Al-Mg composites by stack processing with magnesium alloy plate, aluminum powder, titanium mesh and vacuum hot-pressed sintered. Sintering laminated material in different sintering temperature. The microstructure, ingredient, structure of laminated material and the interface of Ti-Al, Mg-Al were analyzed by SEM and EDS. Test results show that the optimum sintering temperature is 550 oC, and after sintered the aluminum powder and magnesium alloy plate hang together relatively tight by slight interface reaction, and aluminum powder can able to better coating the titanium mesh within the matrix. Mechanical property test found that titanium mesh is role-playing the reinforcement in laminated material, and makes the mechanical properties of laminated material improving significantly.
The Engineering Application of Carbon Fiber Reinforced Concrete Beam
Authors: Zhao Yu Ling , Xu Xin Sheng , Wang Guo Ming
Published: June 2014

This article describes the engineering overview that using carbon fiber to reinforce the concrete beam of industrial building. The designing principles and methods, construction instructions and inspection strengthening quality are analyzed. Currently, the projects seem good in the practice. And the advancement and rationality of this reinforcement technology and design method are proved in the engineering application.
Mechanical Properties of A356 Aluminum Cast Alloy Shaped by Permanent Mold Casting
Authors: Chen Ping , Zeng Jian Min , Gan Wu Kui , Liu Jin Bo
Published: June 2014

A356 is a heat treatable cast alloy which has been widely applied in aviation and automobile industries. In this paper a Sb modified A356 alloy cast with permanent mold has been investigated in order to improve its mechanical properties by changing the needle morphology of the eutectic silicon. The results show that a small amount of Sb addition can contribute refined eutectic silicon morphology and enhance the mechanical properties, especially elongation of the A356 cast alloy poured in permanent molds. The optimal addition of Sb is 0.2 wt.%.
Modeling of Reliability for Anti-Condensation Wall System in Underground Engineering Based on Markov Process
Authors: Zhang Bing , Cheng Zhong Qing
Published: June 2014

This paper introduces the basic principle and structure of the Anti-condensation wall system in underground engineering, sets up the modeling of reliability for Anti-condensation wall system based on Markov process, which contains models of reliability for 5 different series repairable Anti-condensation unit and Parallel Anti-condensation structure. By analyzing the availability of example, this paper can provide some references to rational repair plan.
The "Comfort in all Respects" Principle Implementation by the Example of an Elementary School
Authors: Bolshakov Nikolay Sergeevich , Krivoy Sergey Aleksandrovich , Rakova Xeniya Mikhailovna
Published: June 2014

The modern materials and technologies have an ability to provide a solution of the main goal of modern construction − maximum comfort. This article shows the implementation of comfortable building in a project of primary school. All the components of comfort have been taken under consideration: a rational space-planning, energy efficiency, acoustic isolation, air-tightness, daylight, fire safety, visual aesthetics. Special attention has been given to energy-efficiency: heat transfer coefficients have been calculated, optimal constructions have been selected, involving alternative methods of producing energy. The class of the building’s energy has also been determined. Economic benefits have also been described due to using renewable energy, area economy and so on. As a result, the concept of "comfort in all respects" have been revealed, recommendations on its implementation and further research in this area have been given.
Shield Tunneling Parameters Optimization Based on Dynamic Bayesian Networks
Authors: Zeng Tie Mei , Ding Bao Jun , Wang Yan Hong , Zhang Li Mao
Published: June 2014

To control the surface subsidence in shield tunnel construction, a DBN-based, parameters optimization method was proposed and applied to a tunnel project in Wuhan, China. Selected the construction parameters to optimize as network nodes and set discretizing rules to determine the nodes domain, then discretized monitoring data and applied them to parameter learning to obtain complete DBN model. This model was validated with engineering measured data , then applied it to determine the setting optimal operating-range of each parameters and within that optimized the parameters real-timely according to the monitoring data changing. The results show that this model can reflect the inner link between the surface subsidence and shield construction parameters and this DBN-based method can control the surface subsidence in shield tunnel construction effectively.
The Historical Characteristics and New Developments of Settling Spaces on Bridges
Authors: Yang Chun Xia
Published: June 2014

The wide-use of automobiles in the modern society has made most of the urban bridges gradually changing into the fast lanes connecting riversides. The “lingering” function of bridge which belongs to the public open space weakens. Studying on the traditional characteristics of bridge settling spaces from three aspects of general city space, bridge connecting space and main space can provide the enlightenments for modern development.
Superplasticity Mg Alloy Fabricated by Friction Stir Processing
Authors: Sheng Shang Xiong , Guo Yan Li , Liu Shou Fa , Wu Song Lin
Published: June 2014

In this research, one solid state processing technique, friction stir processing, is applied to modify the AZ61 magnesium alloy billet. The FSP modified AZ61 alloy could be refined to 3-8 μm via the dynamic recrystallization during processing. The AZ61 magnesium alloy billet with 75μm grain size could be refined to about 7.5μm by four-pass friction stir processing. The hardness of the stirred zone could increase to around 70-80 after friction stir processing, and after a further compressive strain of about 3% could raise the hardness to 81. The ductility of the weld direction specimens of the modified alloy could have a 235% elongation at 300°C and 1x10-4 s-1. The grain boundary sliding (GBS) might be the dominant deformation mechanism during superplastic deformation.
Effect of Formamide on the Mechanical Properties of Thermoplastic Protein Films
Authors: Chen Yuan Jia , Liu Xin , Li Wen Bin , Sun Jun Cheng , Sui Kun Yan
Published: June 2014

To manufacture the biodegradable protein films available for potential environmentally friendly application, down feather fiber was prepared and modified by formamide which acts as a plasticizer and then hot-pressed into films. The influence of formamdie on the mechanical properties of thermoplastic down films was investigated. The protein films modified by formamide were tough and showed excellent mechanical properties compared to the films without formamide. The down thermoplastic films modified by formamide showed lower weight loss of formamide indicating formamide is a good plasticizer for protein application.
Mechanistic Study on Adsorption and Oxidation of NO over Activated Carbon
Authors: Li Bing , Xue Jian Ming , Ma Chun Yuan , Chen Jian Min
Published: June 2014

Themechanism of NO adsorption and oxidation over activated carbon at lowtemperature has been studied by NO adsorption and oxidation, NO2adsorption and Fourier transform infrared spectroscopy. The results show thatwhen oxygen is present, activated carbon catalyses NO oxidation into NO2and a stable NO conversion rate is achieved. NO is adsorbed in the form of (NO)2due to the confinement effects of the activated carbon micropore. (NO)2is oxidized into NO2 by oxygen. The disproportionation of NO2gives NO and NO3, that causes the peak of the maximum NOconcentration. When the active sites are saturated by NO3, NO2adsorption and disproportionation gradually diminish, that results in NO2breakthrough and increases the concentration of NO2 to thestationary one. At the same time, the concentration of NO gradually decreasesto the stationary one after the maximum.
Study on Metal Chelation Adsorption of NO Using Fe(II)EDTA Solution in Power Plant
Authors: Bai Yuan , Xue Jian Ming , Li Zhong Hua
Published: June 2014

The influences of concentration of metal chelation solution, pH values, the concentration of O2 supplied by some thermal power plants in Wuxi, and the concentration of SO32- on the adsorption performance were studied. The results indicated that the removal ratio improved with the increase of bulk concentration. However, when the concentration exceeded 15mmol/L, the increase rate reduced. It was found that the chelation ability enhanced with the increase of pH values as well as the decrease of oxygen concentration in the flue gas. The SO32- in the solution was beneficial to improve and extend the adsorption capacity of Fe (II) EDTA. According to the FI-IR, the carboxyl in Na2EDTA coordinated with Fe(II). XPS showed that Fe2+ was the main valence of Fe in Fe(II)EDTA. Through the calculation of fold peak area, the content of Fe2+ was 72.17%. And the existence of Fe2+ in the Fe(II)EDTA was pivotal for the complexation.
Impact of Biochar on Water Holding Capacity of Two Chinese Agricultural Soil
Authors: Wang Dao Yuan , Yan Deng Hua , Song Xin Shan , Wang Hao
Published: June 2014

Adding biochar to agricultural soil has been suggested as an approach to enhance soil carbon sequestration. Biochar has also been used as a soil amendment to reduce nutrient leaching, reduce soil acidity and improve water holding capacity. Walnut shells and woody material are waste products of orchards that are cheap, carbon-rich and good feedstock for production of biochar. The effectiveness of biochar as an amendment varies considerably as a function of its feedstock, temperature during pyrolysis, the biochar dose to soil, and mechanical composition. Biochar was produced from pyrolysis of walnut shell at 900 °C and soft wood at 600 to 700 °C. We measured the effect of these different parameters in two types of agricultural soil in Jilin and Beijing, China, a silt clay loam and a sandy loam, on the soils’ particle size distribution and water retention characteristics. Biochars with two different doses were applied to each soil type. Soil field capacity and permanent wilting point were measured using a pressure plate extractor for each combination of biochar and soil type. The results show that the effect of biochar amendment on soil water retention characteristics depend primarily on soil particle size distribution and surface characteristics of biochar. High surface area biochar can help raise the water holding capacity of sandy soil.
The Full Immersion Test Research of Refractory Weathering Steel
Authors: Chen Man Ying , Zhang Yong Jun , Han Jing Tao , Yao De Ming
Published: June 2014

The paper mainly studied the corrosion properties of refractory weathering steel under chloride ion erosion environment. The full immersion tests on refractory weathering steel and carbon steel Q235 were conducted; and then a comparative analysis from the perspective of the corrosion weightlessness, the macro and micro morphology of rust layers have been made. Results indicated that refractory weathering steel and carbon steel corrosion weightlessness is relatively close to the early stage of corrosion, but the trend is reversed in the mid to late; refractory weathering steel corrosion weightlessness gradually decline, but the carbon steel’s is first increase then decrease. The carbon steel is mainly pitting corrosion, while refractory weathering steel develops general corrosion under chloride ion erosion environment. Rust layers of carbon steel are loose, hollow, and uneven. As the corrosion time goes on, the thickness of refractory weathering steel’s rust layers continuously thickening and the rust layers’ integrity are gradually increasing. The corrosion depth of refractory weathering steel is less than carbon steel’s; so does the longitudinal corrosion. This is because the microstructure of carbon steel is coarse pearlite and ferrite while the refractory weathering steel is granular bainite; the grain boundaries of carbon steel have more inclusions, especially MnS that is easily dissolved in chloride ion erosion environment. It is found that alloying elements Cr, Cu are enriched in the rust layers of refractory weathering steel by means of energy dispersive X-ray spectroscopy (EDS). The enrichment of these alloy elements in the rust layers improves the rust layer density, so that the uniform, dense, smooth rust layers formed on the surface of refractory weathering steel play a significant protective film to improve the substrate resistance corrosion.
Study on the Storage Stability of High Neutralization Degree Phosphate-Bonded No-Bake Sand
Authors: Xia Lu , Long Wei , Zhang You Shou , Huang Jin , Hu Bu Song
Published: June 2014

Effect of particle size of Al (OH)3 and Mg-containing modifier of binder and hardener on the dry strength and storage stability of high neutralization degree phosphate-bonded no-bake sand were studied. Results show that particle size of Al (OH)3 has little effect on the dry strength and storage stability when its varieties are 4.552 μ m toothpaste-grade Al (OH)3 and 6.136μm industrial special Al (OH)3, 6.136μm industrial special Al (OH)3 is more appropriate in consideration of cost and source. Adding Mg-containing modifier to binder code 32B8M15B cannot improve the dry strength and storage stability, but adopting compound modifier, 2% fused magnesia powder+2% iron powder+4% copper powder ,can obtain better properties , dry strength can reach 3.022MPa, and the minimum strength is above 1MPa with humidity fluctuation from 21%RH to 60%RH in 18 days.
A Comparison Study of the Effects of Ultrasonication on the Gelation Behavior between the Silk Fibroin of Domestic and Wild Silkworms
Authors: Zhou Yuan
Published: June 2014

This paper was concerned with the effects of ultrasonication on the gelation behavior of silk fibroins (SF), and a comparison of Domestic and Wild silkworms was studied. The results show that: with the increase of ultrasonic power, the gelation time of domestic (Bombyx Mori) SF solution decreased sharply. But wild silkworms (Antheraea yamamai and Antheraea pernyi) SF were different, When the power of utrasonication was lower than 400-500 W, the velocity of gelation were accelerated, and when the ultrasonic power was higher than 400-500W, the gelation time were delayed. Whatever domestic or wild silkworms, the mechanism of the effects of ultrasonication on the gelation behavior was that the ultrasonication promoted the structural transformation of SF molecules from random coil or α-helix to β-sheet.
Dynamic Models of Cell Growth and its β-Carotene Synthesis from the Red Yeast Mutant
Authors: Wang Sui Lou , Liu Wei , Wang Hai Xiang
Published: June 2014

The fermentative kinetic properties of different batches from the red yeast mutant strain GL-5 with high productive β-carotene were investigated by using a 5-L fermenter. Based on the Logistic equation and the Ganden classification, the kinetic models for the cell growth, base material consumption and yield of product were obtained. These mathematic models were in good consistent with the experimental values, and could provide theoretic basis for controlling and further pilot fermentative production of β-carotene from this mutant strain GL-5.
Flow Field Numerical Simulation on the Membrane Aeration Biofilm Reactor
Authors: Yu Chi , Wang Gang , Zhang Jing , Zhan Shi Ping
Published: June 2014

Based on the design of membrane bioreactor three-dimensional finite element model is established,Finite volume method was applied to sewage treatment in the process of membrane bioreactor internal flow field is unsteady flow numerical simulation and analysis. The results of numerical simulation can be seen at the bottom of the membrane module speed change is small, to purify sewage full contact with membrane module, the upper change is bigger, treated sewage can be quickly exhaust to the outside world. This study on flow field of the bioreactor of in-depth study, the new structure design and optimization has its far-reaching significance. Finite volume method was applied to sewage treatment in the process of membrane bioreactor internal flow field is unsteady flow numerical simulation and analysis. The results of numerical simulation can be seen at the bottom of the membrane module speed change is small, to purify sewage full contact with membrane module, the upper change is bigger, treated sewage can be quickly exhaust to the outside world. This study on flow field of the bioreactor of in-depth study, the new structure design and optimization has its far reaching significance.
Numerical Simulation of IHF Fluorine Plastic Centrifugal Pump Inner Flow
Authors: Qi Feng Lian , Yan Yong Xu , Zhao Wei , Cao Shi Qi
Published: June 2014

The paper takes the twisted blades of fluorine plastic centrifugal pump as the research object. It used the flow field calculation software Fluent based on average N-S equations and standard k-ε turbulent model, and adopted the method of SIMPLEC algorithms, it conducted the numerical simulation on uncompressed flow of fluorine plastic centrifugal pump of twisted blades in different conditions. The results show that the relationship between the lift,shaft power,efficiency and flow, are compared with experimental ones, and it shows that the predicted performance coincides with the experimental one well, the simulation provides theoretical basis for the optimizing design.
A Maintainability Prediction Method of NC Machine Tools Based on Comparing with the Benchmark Failure Mode
Authors: Hao Qing Bo , Yang Zhao Jun , Meng Guang Wei , Chen Fei , Xu Bin Bin
Published: June 2014

In order to overcome the problem that the maintenance date for NC machine parts was lacking, this paper proposed a maintainability prediction method based on comparing with basic unit. The biggest difference from traditional methods was that the traditional methods analyzed parts, but in this method, failure modes were analyzed and interval number was used to express expert opinions. The maintenance action for each failure mode was decomposed into several basic maintenance tasks. Comparatively speaking, the method had more adequate data and higher accuracy. Finally, the method was illustrated with an example. The analysis results showed that the method was feasible for the maintainability prediction of NC machine tools. It could solve the existing principal problems and provide a new idea for predicting maintenance in the field of NC machine tools.
Power Plant Boiler Failure Analysis of Main Components
Authors: Xia Hong Liang
Published: June 2014

This paper briefly introduces the basic condition of power station boiler operation and failure analysis of the necessity of power plant boiler failure types and main components of power plant boiler failure types of main components. Illustrates the failure analysis of the main analysis method, and introduces the failure analysis of the role of failure analysis.
Design and Trial of MW-Scale Wind Turbine Blade Fatigue Loading Control System
Authors: Wang Yi Chun , Wu Jian Zhong , Liao Gao Hua
Published: June 2014

This study analyzed requirements of the wind turbine blade fatigue loading, and proposed a novel design method for blade fatigue loading control system. The hardware and software of the control system were designed. Frequency scanning, frequency control and amplitude tracking flow chart have been presented. A control system of the fatigue loading facility was built based on this investigation. The loading test of wind turbine blade has been completed. The data and curve acquired from the test prove that the control system could satisfy loading requirements.
Reliability Analysis of the Suspension Device in the Refit of a Tracked Vehicle
Authors: Sun Wei , Ma Bing , Ma Jin , Zhao Yao
Published: June 2014

To improve the flexibility performance of tracked vehicles, lots of jobs has been done in the refit of driveline. Therefore, tough risks are transferred to the strength and fatigue life of suspension device. Through analyzing the effect of driveline refit to the performance of suspension device, a scheme that enhancing the stiffness of the torsion bar is proposed. By using the MSC.Patran/Nastran software, the model of suspension device is constructed, via the simulation of the stress state and fatigue strength that is loaded on the main suspension parts at the static equilibrium position and the maximum stroke position of equilibrium elbow, and performance testing on actual roads, this scheme is considered to be reliable.
The Rod Force Law Analysis of 600MW Air Cooling Tower
Authors: Liang Tao , Meng Chun Ling , Li Yang , Zhao Xiu Hua
Published: June 2014

The finite element analysis of large air cooling tower was carried out using ABAQUS. On the basis of strength above,8 types of the axial force are analyzed and summarized, find valuable rules, and put forward the further optimization design. So that it can satisfy the strength and stability of air cooling tower, the structure is more reasonable, reduce weight, reduce the cost.
Finite Element Analysis of Structural Strength of Concrete Mixing Truck’s Frame
Authors: Sun Hai Xia , Wei Hua Kai , Zhao Xiao Fang , Qi Jia Rui
Published: June 2014

The finite element model of the concrete mixing truck’s frame is builded by using shell as basic element, and the process of building the finite element model of the balance suspension is introduced in detail. Based on this, frame’s stress on five types of typical operating conditions are calculated by using the finite element analysis software, NASTRAN, and results can show the dangerous position and the maximum stress position on the frame. The analysis result on structural strength can provide the basis for further improving the frame structure.
Research of Unloading Technology of Defect Method in Dynamic Pressure Roadway
Authors: Zhang Rui Xi , Jiang Cong
Published: June 2014

This paper takes typical stoping of deep-mine dynamic pressure working face of Zhaogezhuang mine of Kailuan mining area for the research background, relieving the dynamic pressure of roadway of burst tendency through building defect method in dynamic pressure roadway. Putting forward the theoretical solution of defect method in dynamic pressure roadway based on elastic-plastic theory;Taking numerical simulation method in view of the material inhomogeneity of actual engineering geological, researching the characteristics of stress distribution of roadway surrounding rock after relieving in defect method; Applying the theory to the stoping of deep-mined impact working face, and the implement effect is good on the spot.
Rigid Joints Transferring Forces outside Box Columns with Deviation of Column's Verticality - Finite Element Method Simulation
Authors: Liang Guang Xian , Xu Zhong Gen , Chen Wei Ming , Deng Chang Gen
Published: June 2014

Three groups of specimens were designed in this paper to compare the performance of rigid joints transferring forces outside box columns to that of traditional joints by finite element method program ANSYS. The influences of deviation of verticality in columns on stiffness, yielding capacity, and ultimate carrying capacity were analyzed. The evaluation of working performance by adding force-transforming plates could be found. The thickness and width of adding plates would be the key parameters of steel frame joints. This paper put forward the optimal range of design parameters.
Topology Optimization Design of Pre-Stressed Plane Entity Steel Structure with the Constrains of Stress and Displacement
Authors: Yao Li , Gao Yun Xia , Yang Hai Jun
Published: June 2014

For the prestressed plane entitiy steel structure topology optimization design which design variables include the cable pretension value, unit size and the structural topology, the optimized mathematical model which objective function is the minimum structural weight is established with consideration of the constrains of stress and displacement. As for the solving method, firstly we need to determine the pretension applying to the cable according to full stress design and choose the unit size; then we need to conduct displacement sensitivity analysis to delete the low sensitivity unit to realize the structural topology optimization design. The example result is in conformity with the corresponding system of mechanical performance, and it indicates that the method proposed in this paper is effective.
Local Weak Support Effect on the Stability of Surrounding Rocks in Deep Roadway
Authors: Hu Wei Jun , Cheng Hua
Published: June 2014

Coal mine roadway roof and sides often take strong support, and the floor support is weak or none support. Because of the high stress, roadway damage phenomena have occurred often, take reasonable repair plan is the key to the recovery project. Reasonable repair plan not only can effectively control the deformation of surrounding rocks, but also can reduce the maintenance cost. According to the surrounding rocks’ property and depth of roadway in Anhui Huainan Pan-III mine, using FLAC3D numerical simulation software, analysis of the effect on plastic zone, surrounding rocks stress and displacement under different floor support, and put forward the repair plan to this coal, the related research conclusions can provide reference for design and construction to similar engineering.
Research on Lifetime Remaining of Bridge Based on Gray Theory
Authors: Zhang Ying , Huang Hai Xin , Cheng Shou Shan
Published: June 2014

The method of predication is the key for evaluating lifetime remaining of existing bridge in bridge assessment. Improved Gray Model,which can supplement and make full use of new information in time,on the basis of Gray Theory is tried to be used here,and compared with traditional model by analysizing an engineering case.The results show that the improved model can not only improve the precision of prediction,but also comply with the nature of dynamic property of bridge lifetime remaining,i.e.,as the latest inspection information updates the predication value.
Quality Diagnosis in Dynamic Process Based on Multi-Feature
Authors: Zhang Shuai
Published: June 2014

Recognition of quality abnormal patterns for a dynamic process has seen increasing demands nowadays in the real-time process fault detection and diagnosis. Based on the analysis of the quality abnormal patterns in a dynamic process, a novel method based on multi-feature of quality abnormal patterns by using a multi-SVM (MSVM) was proposed. The simulation results indicate that the recognition accuracies of the MSVM classifiers with the different features are quite different. It is shown that this MSVM model with suitable features can increase the recognition accuracy.
Research on the Aerospace Six Sigma Improvement Mode
Authors: Jia Chun Feng , Duan Bo
Published: June 2014

This study aims to organically integrate the concept and method of six sigma improvement with the characteristic and experience of aerospace quality improvement, and to develop the conception, main idea, framework of aerospace six sigma improvement suit for the characteristic of aerospace and the method of project identification,improvement and evaluation. Aerospace six sigma improvement is a localization development of six sigma improvement method in aerospace.
Improvement of Folded Line Assistance Characteristics Curve for EHPS System
Authors: Fang Gui Hua , Zhang Li Bo
Published: June 2014

Electro-hydraulic power steering system (EHPS) assistance characteristic curves are generally linear, folded line and curve type. The folded line type combines the advantages of linear and curve type assistance characteristic, but the slope of the characteristic curve changes suddenly, which have an impact on the driver, leading to potentially dangerous. In view of existing problem, the article studies deeply the characteristics of the power system to apply computer simulation technology, and improves the folded line characteristic curve. The simulation analytic results show clearly that the improvements of folded line assistance characteristics curve is reasonable.
The Development of the Automatic Cleaning Machine for Spinneret Orifice
Authors: Fu Xiao Dong , Feng Pei , Yang Chong Chang
Published: June 2014

The automatic cleaning requirements of spinneret orifices were analyzed. The three-dimensional positioning system for spinneret orifices cleaning, combining the XY horizontal motion platform and Z axis electric translational platform, was determined. The cleaning device of spinneret orifices was designed. The control system of automatic cleaning for spinneret orifices was developed based on Labview and the experimental analysis of the prototype was done in this paper.
Development of 6-DOF Transportation Vibration Platform
Authors: Zhu Yan , Zhu Shi Shun , Wang Guo Jun , Gao Yan
Published: June 2014

A kind of design of 6-DOF transportation vibration platform was introduced. Based on the principle of Space Mechanism, the kinematics model of 6-DOF transportation vibration platform was described and the design of position servo-control system was presented. With a motion simulation experimental, the comparison results of Output/Input data in different directions were obtained. The results show that the vibration data are reproduced very well on the platform within the main frequency range in six directions.
Analysis of Typical Phenomenon in Quadruped Robot Engine PID Control
Authors: Wu Ji Yuan
Published: June 2014

The work conditions of quadruped robot engine are adjusted by PID control. And this paper summarizes three typical anomalies which are reverse adjustment of throttle, engine violent start and steady-state error occurred during PID control process. The cause of the phenomenon is given by analyzing the principle of the algorithm itself, the surrounding experimental environment and other factors deeply. And it is verified by designing experiment so that it eliminates the interference to the experiments conclusions and deepens the understanding of the nature of PID control to achieve the better effect.
Kinematics Analysis of Virtual Prototype System on Multiple Redundant Bionic Arm
Authors: Zhao Kai , Liu Xiu Juan , Song Li Min , Wang Chun Guang , Yuan Lei
Published: June 2014

The simulation technology can be very convenient for the kinematics analysis of the virtual machine system. It not only simplifies the development process of product design, but also verifies the correctness and feasibility of the theory. Based on the theory analysis, simulation test is finished with the simulation software, and the correctness of the theoretical analysis is validated. Through the analysis on the simulation results of the torque, reference for future development of prototype is provided.
Research on Real-Time Performance of the Distributed Control System Based on RTLinux
Authors: Zhang Peng , Guo Qin , Wang Bin
Published: June 2014

Through the analysis of RTLinux source code and real-time performance of various testing experiment on the RTLinux, and its application in a distributed robot control system using CAN bus, realize the real-time control of robot joints. Write the code of real-time module on RTLinux, analyzing the real-time performance using related kernel time testing function. Under Linux using QT write user interface for robot control, running on the Linux user space. The interface program and the real-time program communicate via RT-FIFO. Specify the location of each robot joint in the interface program, compared with the feedback from the actual joint position trajectory, evaluate the control effect of real-time systems.
Dynamics and Structural Analysis for Arm Equipped on Intelligent Wheelchair
Authors: Zhu Li Da , Gu Zhiang , Zeng Can Can , Luo Gui Bin
Published: June 2014

Mechanical arm equipped on the intelligent wheelchair has the same characteristics with the common robot. And the mechanical arm installed on a wheelchair has greater research value in helping the elder and disabled. This paper focus on the kinematics of four DOF mechanical arm equipped on wheelchair, developing a mathematical model in order to realize the control of it and establishing the mechanical arm’s kinematics equations by using D-H conventions. Analyze its work space and structural strength based on MATLAB and ANSYS, which laid the foundation for design optimization and control application.
Dynamic Parameter Identification of the Base of a Space Robot when Considering the Gravity Gradient
Authors: Sun Han Xu , Chen Zhi Lian , Chen Gang , Jia Qing Xuan
Published: June 2014

This paper presents a dynamic parameter identification method of the base of a free-flying space robot. Since the dynamic parameters play a significant role in the control of space robot system, it is necessary to identify the dynamic parameters of a space robot. First the dynamic parameters of the base are identified based on principle of momentum conservation in this paper. Then gravity gradient torque is used to identify the product of inertia for that it has effect on the attitude of a space robot. The principle and experimental process of the identification are introduced and the feasibility of the method is verified by simulation.
Finite Element Simulations of an Inchworm Type Piezo-Driven Rotary Actuator
Authors: Huang Hu , Fu Lu , Zhao Hong Wei , Shi Cheng Li
Published: June 2014

The inchworm-driven actuator is an important type of piezo-driven actuators, which has high loading capacity, large motion range and high motion accuracy but involves complex structures, control and motion processes. In this paper, an inchworm type piezo-driven rotary actuator was introduced. Static and modal analyses of key units of the rotary actuator such as the clamping unit and the driving unit were carried out by finite element simulations to ensure that key units of the rotary actuator have enough strength and good dynamic characteristics. These simulation results will be helpful to improve structure design of the inchworm actuator.
Inverse Kinematic Solution and Dynamic Model to 3PTT Parallel Mechanism
Authors: Hao Xiu Qing
Published: June 2014

Take typical parallel mechanism 3PTT as research subject, its inverse kinematic analysis solution was gotten. Dynamic model of the mechanism was established by Newton-Euler method, and the force and torque equations were derived. Dynamic simulation of 3PTT parallel mechanism was done by using ADAMS software, and simulation results have verified the correctness of the theoretical conclusions.
Forward Kinematics Analysis and Experiment of Small-Caliber Well Rescue System
Authors: Sun Xiu Juan , Wang Chuan Jiang , Wu Jian
Published: June 2014

As for the new designed small-caliber well rescue system for the fallen person in deep well, we made a detailed description about the rescue mechanism, which was composed of framework, anchorage set, stretching arm and clasp arm, and illustrated the function of each mechanical component. Moreover, we deduced the forward kinematics matrices of the clasp arm and the stretching arm, and analyzed and provided the parameters of each degree of freedom. Meanwhile, the experimental prototype of the rescue system was designed and the imitated rescue experiment for a doll was fulfilled. The experimental results show that the rescue system is feasible in small caliber deep well rescue.
Target Location of Industrial Robot Based on Vision
Authors: Jia Gui Hong
Published: June 2014

Vision is the most important way to obtain information from the word. This paper collected the target image using industrial robot vision system, and We get Black and white images using binary image segmentation method, then the contour of each object in the image can be obtained with edge detection and contour extraction, The centroid position was confirmed using minimum enclosing rectangle method after gaining the outline of target. The experimental results show that this method can quickly and accurately obtain multiple target centroid position.
Design of Guidance Law with Impact Angle and Impact Time Constraints
Authors: Feng Lin Ping , Fan Zuo E , Zhang You Gen
Published: June 2014

In order to achieve the tactical mission of cooperative attack for multi-missiles, in a predetermined direction at a predetermined time, this paper studies the design of guidance law with impact angle and impact time constraints. Firstly, using the optimal control theory, the optimal guidance law is designed to control the impact angle, based the relative motion between missile and target. Then the state feedback guidance law is designed to control the arrival impact time, with the application of feedback linearization control theory. Finally, reference the design idea of two-stage guidance system, the anti-ship missile use two different guidance laws in the process of attacking the target. During the first stage, the state feedback guidance law is used to accurately control the impact time and coarsely control the impact angle. During the second stage, the optimal guidance law is used to accurately control the impact angle. And the correctness and effectiveness of the design method is verified by simulation.
Study on Battery Management System Design of Electric Vehicle and Strategy of the SOC Estimation
Authors: Yu Zhong An , Jian Jun Peng
Published: June 2014

In order to improve the efficiency and service life of Lithium batteries for electric vehicle. A structure diagram of battery management system with the digital signal processor as the main controller was designed; in addition, some design modules were expatiated clearly, including the sample circuits of the batterys voltage, current and equalization circuit. The state-space representation of the battery model was established based on Thevenin battery model and extended Kalman filter (EKF) algorithm.According to the estimates and performance characteristics of battery, a new improved-way by amending the Kalman filter gain with the actual situation for raised the SOC estimation accuracy was proposed. The simulation and test results under the condition of simulated driving show that this new way really can increase the SOC accuracy; the equalization scheme can effectively compensate the performance inconsistency of battery pack.
Study on the Teleoperation Virtual Liver Surgery Simulation System with Haptic Feedback
Authors: Fang Yan Hong , Huang Feng Juan , Wu Bin
Published: June 2014

To improve the viability and effectiveness of virtual surgery simulation in telemedicine development, a teleoperation virtual liver surgery simulation system with haptic feedback is studied in this paper. First, teleoperation system structure is designed. Then, key technologies of the system including remote robot controlling, virtual liver surgery simulation and telecommunication are studied. Experimental platform of virtual liver surgery was established based on vizard 4.0 and Sensable-phantom® desktopTM. Telecommunication system based on the Client/Server mode was established using the Microsoft Visual Studio 2008. The initial experiment results show that the system can provide a stable force to the human operator and can transmit remote virtual surgery simulation with a real time, which make a perfect foundation for the next implementation of teleoperation virtual liver surgery simulation system.
Customized Saddle Design Method Based on Cubic B-Spline Surface
Authors: Yang Qi Jun , Zheng Shu Xian , Li Jia
Published: June 2014

Aimed to the comfort demand of people for the high-end bicycle saddle, a parametric design method of customized saddle is presented based on the Cubic B-spline theory. According to the relationship between Cubic B-spline control points and the saddle shape, the outer contour control points is determined firstly, then all control point positions on the saddle surface are calculated by these outer contour control points, and the parameterized model of the customized saddle is built and its overall surface is designed. On this basis, a more reasonable saddle surface is obtained by adjusting the control points. Finite element analysis (FEA) is carried out on customized saddle and common bicycle saddle respectively. Their stress distributions comparison result shows that customized saddle can minimize pressure to the anterior perineum and ischial tuberosity effectively. These verify that the saddle customized design method is feasible.
Design of Drainage Pipe’s Intelligent Exhaust Valve
Authors: Zhu Min Jie , Ye Sen Gang , Jin Bao Geng
Published: June 2014

The exhaust valve failure may cause drainage pipe leakage, but most of exhaust valve are lack of leakage protection and real-time alarm function. A set of new intelligent exhaust valve can monitor, alarm and close drainage pipes in this paper. The system consists of main controller, power supply, valve body and actuator. The exhaust valve is leak, the system sends failure SMS to the server or maintainer, and exhaust valve is closed to prevent environmental pollution simultaneously. The main controller is the core unit, and consists of power circuit, detection and driving circuit, micro chip and GSM/GPRS module. The intelligent exhaust value is put into practice, and it solves leakage and alarm problems effectively.
Intelligent Control on Valve-Controlled Motor Speed Servo System
Authors: Jiang Shou Yong , Liu Yan Jun
Published: June 2014

A intelligent speed control method for the hydraulic valve-controlled motor system was presented based on the fuzzy-neural network control which introduces the fuzzy control into neural network. The simulation results showed the self-adaptive ability and controlling performance of the hydraulic valve-controlled motor system was improved.
Automatic Weight Classifying Machine of Objects with Load Cell
Authors: Prewthaisong Kataphon
Published: June 2014

This research paper presents the experimental results of classifying weight of objects by using a load cell. The machine was designed to classification of all three different objects' weight and the objects consisted of light weight, medium weight and heavy weight to move along the conveyor belt into the defined tray. Load cell was used for the object detection by reading the amount of the objects' weight, after that converted into an electrical signal for each different weight and then micro-controller process to control the stepper motor by closing or opening the door. The tray was designed to into 3 slots for the objects on condition that the operation of two stepper motors. If the one is rotated clockwise 130 degrees to open the door for a heavy weight to flow into slot on the left, if the other one is rotated clockwise 98 degrees to open the door for a medium weight to flow into slot on the center and if both ones are stopped a light weight to flow into slot on the right. From the result, it can be shown that the average classifying time of the testing objects is 15.30, 14.68 and 14.34 seconds for heavy weight, medium weight and light weight respectively and the classification of objects with high accuracy.
Research on Sterotype Kettle Screw Error Compensation
Authors: Chen Xiang Lin
Published: June 2014

In order to solve the position inaccuracy when parking the kettle net car, we studied the compensation method of the screw rotation .The reason of the error has been found by analyzing the setting position and the actual position of the screw during transmission process. The enlargement process was added into the PLC data block and a sent pulse formula which was of the screw error compensation was deduced based on the test data .The test result showed that the screw drive error can be controlled within the specified range effectively and that the net car would park in the setting location by this way.
Research on the PID Control Strategy in BP Neural Network of Terrain Detector-Milling Cutting Depth System
Authors: Feng Xiao , Hu Hao , Kong Fan Rang , Qiu Shi , Sun Ye
Published: June 2014

Targeting at the nonlinear, time-varying characteristics of terrain detector-milling cutting depth electro-hydraulic servo system in soil milling collection machines, this paper proposed the PID control menthod in BP neural network of terrain detector - milling cutting depth system and designed PID controller in BP neural network and conducted simulation analysis by programming with Matlab. The results show that, when compared with conventional PID control, BP neural network compounded with PID control would enable the system better dynamic performance and follow-up characteristics, therefore, it is an effective control strategy.
Optimization and Simulation Analysis of Electro Hydraulic Control System of Clutch Engagement Pressure
Authors: Jin Han Yu , Cheng Xiu Sheng , Song Xiu Feng
Published: June 2014

As an important section in powertrain system, the clutch control strategy directly impacted vehicle ride comfort. In this paper, the design scheme of electro hydraulic control system was composed and simulation analysis was conducted by AMESim software. The system parameters were optimized according to genetic algorithm. Series progress of control system design, analyzation and optimization were completely demonstrated.
Adaptive Backstepping Sliding Mode Control of Electro-Optical Tracking Servo Turntable
Authors: Li Ke Yu , Tian Fu Qing , Wang Jue
Published: June 2014

The torque ripple of torque motor has serious influence over control accuracy of electro-optical tracking servo turntable. In response to this defect, an adaptive backstepping sliding mode control algorithm was proposed. Firstly, the mechanism of torque ripple was analyzed, and the math model of which was set up. Then, based on the model of whole servo system, the sliding mode control and backstepping algorithm were combined to design adaptive backstepping sliding mode (ABSM) controller. Finally, a simulation experiment was finished to with compare control performance of ABSM controller and PID controller. The simulation results show that, compared with the control accuracy of the PID controller, ABSM controller enhances the robustness of system, and approves control accuracy of servo turntable evidently.