bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Leaching of LiCoO2 in Low H2SO4 Concentration Solutions
Authors: Yang Yong Qiang , Wang Cheng Yan , Li Dun Fang , Yin Fei , Chen Yong Qiang , Jie Xiao Wu
Published: February 2011

The leaching behavior of battery grade lithium cobalt oxide (LiCoO2) was studied in Na2SO3-H2SO4 aqueous solutions with low H2SO4 concentration. The effects of H2SO4 concentration, leaching time, leaching temperature, and dosage of Na2SO3 on the leaching rate of LiCoO2 were investigated. The experimental results show that all the cobalt in LiCoO2 can be dissolved in the following conditions: the H2SO4 concentration of 0.4 mol/L, the leaching time of 0.5 h, the leaching temperature of 70°C and the Na2SO3 dosage being equal to the weight of LiCoO2. It is proved that the leaching of LiCoO2 in the system of Na2SO3-H2SO4 solutions is much more effective than that in other leaching systems. Moreover, the consumption of H2SO4 can be lowered greatly. Based on the leaching of pure LiCoO2, the Na2SO3-H2SO4 leaching system is further applied in the treatment of spent Li-ion battery and the leaching rate of cobalt can be achieved as higher as more than 98%.
Experimental Research of New Technology on the Precise Reduction of Micron-Sized Iron Oxide
Authors: Li Shi Qi , Gao Jin Tao , Chen Pei Yu , Shen Ping , Zhang Yan Ting , Liu Run Zao , Wang Yu Gang
Published: February 2011

This study puts forward the technology of the precise reduction of micron-sized iron oxide: at lower temperature (＜1000°C), the high purity metallic iron can be reduced, separated and extract from iron ore, slag, the iron oxide in the dust which are in micron size. Precise reduction experiments are planned for high phosphorus hematite in Enshi, magnetite in Kazuo and the steel dust of a factory, in order to do the study on their reduction characteristics. According to the L16 (215) orthogonal test on high phosphorus hematite and magnetite, the result shows that: in the atmosphere of pure H2 or 100% CO, the micron-grade mineral powder can be reduced at the condition of 650~850 °C; compared with the conventional particle size powder, the reduction temperature lowers about 300~350 °C in the same reduction degree. According to the L8 (27) orthogonal test on steel dust, the result shows that: by pure H2 or 100% CO, the average metallization rate can reach 95% at the temperature of 900~1000 °C; the product of reduction keeps power state and its interparticle sintering does not occur, which means that it is reasonable to separate iron from other impurity elements through the physical method in the non-melting state.
Study on Indium Leaching from Indium-Poor Zinc Residue Enhanced by Ultrasonic Treatment
Authors: Yao Jin Huan , Li Xuan Hai
Published: February 2011

In this paper, orthogonal experiment design method was applied to determine the optimum condition for indium leaching from indium-poor zinc residue in HCl solution. Taking the results of range analysis and the situation of industrial production into consideration, the optimum conditions for conventional leaching are: reaction temperature 70°C, concentration of HCl 6 mol/L, leaching time 1.0 h, and ratio of liquid to solid 8:1. Under the optimum conditions, ultrasonic was used to enhance the leaching process. Compared with the conventional leaching process, this new process can provide better indium recovery, shorter leaching time, and faster leaching rate. The indium extraction of indium-poor zinc residue with ultrasonic treatment is up to 96 %, which is 31.0 % higher than that without ultrasonic treatment. In addition, the normal agitation improves the diffusion of solution in the ultrasonically enhanced leaching experiment.
Innovative Process of Leaching of Nickel Supported Activated Carbon in Ammonium Sulfate
Authors: Zhang Ze Biao , Wang Wan Kun , Peng Jin Hui
Published: February 2011

The leaching tests of nickel supported activated carbon under normal pressure in (NH4)2SO4were studied. The effects of experimental condition, such as initial concentration of (NH4)2SO4, liquid-to-solid ratio, leaching time and leaching temperature on the leaching rate of nickel, were investigated. The results show that the leaching rate of nickel is 96.12% with initial concentration of (NH4)2SO4of 7.5%, liquid-to-solid ratio of 2, leaching time of 5h and leaching temperature of 25°C. The morphology of nickel supported activated carbon before and after leaching was characterized by XRD, which proved the effective separation of nickel and activated carbon. The leaching rate of nickel was also shown better at room temperature and atmospheric pressure. Moreover, it needn’t equipments enduring high-pressure and high temperature in the leaching process, thus reducing the costs of leaching equipments greatly. This work provides a new way to the comprehensive utilization of nickel-containing activated carbon.
New Evaluation Index of Blast Furnace Raceway Activity
Authors: Liu Xiao Qin , Wu Sheng Li , Liu Cheng Song , Xu Jian , Fu Chang Liang , Kou Ming Yin
Published: February 2011

The shape feature of tuyere raceway possesses an important effect on hearth state and BF operation. With analyzing channel for permeating gas and liquid in the hearth section in the position of tuyere raceway, it can be seen that the channel amount is mainly determined by section of raceway and section between the raceways. On the basic of theoretical and statistical analysis on practical production data, the new evaluation index of indicating tuyere raceway shape feature was proposed. In the condition of high blast volume, the new index AITR tended to increase and BF production was improved gradually as blast volume increases. The good evaluation character of this new index AITR has been validated with practical production data in this work.
Analysis and Experiments on Pulse Vibrating Suction Method for Wall Climbing Robot
Authors: Zhao Xiao Yang , Liu Rong , Wang Ke , He Jun Hu
Published: February 2011

This template explains and demonstrates how to prepare your camera-ready paper for In this paper, the pulse vibrating suction method (PVSM) for wall climbing robot is presented, which is based on the principle of vibrating suction method. To analyze this method in depth and evaluate its performance, a simplified mathematical model based on some assumptions is built, and a new experimental platform for single suction cup is developed as well. Experiments on single suction cups indicate that the experimental results match the mathematical model well with only small deviation, which is caused by some unknown factors. Then experiments are carried out on a vibrating suction module which was developed previously. With the PVSM, the suction module can stay on the wall stabely, which verifies the vadality of this vibrating method. Suction failures for the module are also analyzed with different control parameters.
Flocking Task Research for Multiple Mobile Robots Based on Evolutionary Game Model
Authors: Ye Ye , Xie Neng Gang , Cen Yu Wan , Liu Qing Yun
Published: February 2011

For flocking task of multiple mobile robots (MMR for short), the paper establishes a multi-objective optimization model and studies a solving method based on game theory. According to evolutionary game theory and taking the dynamic variability of gaming behaviors into account, it proposes a method based on evolutionary game model by using evolutionary rules “In success, commit oneself to the welfare of the society; in distress, maintain one‘s own integrity ”. Then, the paper performs researches on path coordination and obtains the optimum non-collision coordinated paths of flocking task for MMR. The simulation results show that the evolutionary game method can effectively solve coordinated path planning problem for multiple robots. By contrast with Nash equilibrium game model and coalition cooperative game model through computation results, the paper illustrates that the evolutionary game model is the best.
Boom System Kinematic Simulation of Truck-Mounted Concrete Pump
Authors: Zhou Xin Xiang , Ren Nan Nan , Guo Shu Jun , Tang Yan Ling , Tian Rong Liang
Published: February 2011

In this paper, we study the boom of truck-mounted concrete pump from a company. After analyzing, we determine that the four booms extending horizontally is the most dangerous working conditions. We use the software Solid Works to design three-dimensional entity. With the help of Cosmos Motion which is a part of Solid Works, realizing the kinematic simulation. This paper study and analyze the problems during the simulation process, and collect a series of curves of kinematic simulation, mainly including the place-time curve, velocity-time curve and force-time curve, and analyze these curves detailedly.
Consensus Algorithm for Swarm Robotics Cooperative Control
Authors: Lei Bin , Zeng Liang Cai
Published: February 2011

A critical problem for swarm robotics cooperative control is to determine appropriate consensus algorithms so that a group of robots can reach consensus on the values of coordination data. In this paper, we defined the Information Interactive Graph ( IIG ) and the Information Interactive Matrix ( IIM ) to represent the information interaction relationship between each robot based on algebra graph theroy. Proofed the necessary and/or sufficient conditions for consensus and presented some consensus algorithms under static topology. Finally, simulation results showed that our algorithm can make a swarm of robots reach a consensus on the shared coordination data.
Pose Accuracy Analysis of Robot Manipulators Based on Kinematics
Authors: Zhang Jian Ye , Zhao Chen , Zhang Da Wei
Published: February 2011

The pose accuracy of robot manipulators has long become a major issue to be considered in its advanced application. An efficient methodology to generate the end-effector position and orientation error model of robotic manipulator has been proposed based on the differential transformation matrix theory. According to this methodology, a linear error model that described the end-effector position and orientation errors due to robot kinematics parameters errors has been presented. A computer program to generate the error model and perform the accuracy analysis on any serial link manipulator has been developed in MATLAB. This methodology and software are applied to the accuracy analysis of a Phantom Desktop manipulator. The positioning error of the manipulator in its workspace cross section (XOZ) has been plotted as 3D surface graph and discussed.
Force Control of a Distributed-Parameter Flexible Arm via Parallel Compensation
Authors: Liu Liang Yih , Lin Hsiung Cheng
Published: February 2011

In this paper, the force control of a constrained one-link flexible arm is fully studied based on a linear distributed parameter model, including the internal damping of Kelvin-Voight type. A new input induced by the joint angular acceleration and a virtual contact force output generated by a parallel compensator are defined. The inherent limitations due to the non-minimum phase nature of the noncollocation from the joint torque input and the tip contact force output can be thus resolved. Therefore, the transfer function from the new input to the virtual contact force is not only driven to a strictly minimum phase but also stable condition. The integral control is then used to improve the performance of the overall closed loop system. Also, the asymptotic tracking of a desired contact force trajectory can be achieved with the internal stability. On the other hand, the exact solutions in the infinite-dimensional system are reached using the infinite product formulation. Numerical performance results are provided to verify the effectiveness of the proposed approach in term of fast, stable and robust performance.
Condition of Intelligentize Realization of Robots
Authors: Liu Yun Yu , Zhang Xiao Yan , Zhang Huan Yu
Published: February 2011

Though research and developmengt of manipulator was used in optical working, Similitude and difference were compared in realization of act and design of industry automatization with mechanism of human being and animal, Concept of conform and difference of simulation route was put forward, How was method of nbspprecision point Location achieved, It was explained to quiddity of bionics and characteristic and relation of intellectualized development of robots; Similitude and fuzzification of that movement were studied and imitated, Action was trained again and again it have contact with feedback of signal; A sort of way was brought toward to development and implement of artificial intelligence of robots.
Design of Automatic Buildup Welding Machine and its Application in Train Hook Repair
Authors: Shi Hong Xin , Zhu Jin Hong , Song Lian Mei , Zou Xiao Ping , Han Jian
Published: February 2011

A kind of automatic welding machine and its microcomputer control system were designed in this paper. The mechanical system includes a floating welding workbench, the two-dimension mechanism and the indexing mechanism. There are two choices for the control system, based on PLC or IPC separately. The automatic welding machine can be applied to train hook buildup welding. Experiments showed that reasonable buildup welding was achieved, and the automatic buildup welding equipment can improve productivity and work conditions.
Research on Control Method of a Novel Type of Excavator Based on Multi Degree-Of-Freedom Controllable Mechanism
Authors: Cai Gan Wei , Wu Du Chao , Pan Yu Chen , Xu Xi Yong , Zhang Zhuan
Published: February 2011

The new type of excavator based on multi degree-of-freedom controllable mechanism is a typical nonlinear multi-input-multi-output (MIMO) system, of which the closed chain constraints make it with strong coupling relationships. Consequently, the classic PID control method is not able to satisfy the control demands of the system. This paper introduces a fuzzy adaptive PID control method focusing on the improvement of the control accuracy of the excavator based on fuzzy logic inference according to the actual response of the control system, aiming at the automatically online adjusting of the PID parameters. A simulation study is also proposed. The correctness and validity of the project is verified by comparing the simulation results of the fuzzy adaptive PID controller with those of the classic PID controller. Results show that the former one designed for the new mechanical excavator has shorter settling time, and with less overshoot, than the latter one.
Design and Implementation of an Articulated Robotic Arm for Precise Positioning
Authors: Ovy Enaiyat Ghani , Ferdous Shah Muhammad , Rokonuzzaman Mohammad , Chowdhury Nurul Absar
Published: February 2011

This project is intended to design an articulated robotic arm which could locate a point in space with its given coordinates at three degrees of freedom. The basic three rotary movements are base rotation, first and second arm swivel. With different payload capability and design, the robot can be employed in various industrial applications including spot welding, assembling, cutting, material handling and many more. The mechanical structure is designed and a physical setup is developed for which a microcontroller based control circuit is designed for the purpose of control. This paper is focused mainly on the mechanical design of the structure. An elaborate analytic description of the components and tools is presented with necessary specifications. This structure is very flexible and has the ability to reach over obstructions. It can achieve different positions and orientations with in the working envelop.
Dynamic Cooperative Manipulating Pattern Generation for Mobile Humanoid Robot Using Waist Moment Compensation
Authors: Zhao Tie Jun
Published: February 2011

This research is aimed at dynamically stable motion and safety of mobile humanoid robots expected to work in a human living space. The mechanism of the mobile humanoid robot YIREN is described. A highly flexible anthropomorphic 7-DOF robotic arm and a new waist configuration with parallel driving motor are developed. Because the dynamitic behavior of manipulator and waist has an effect on the stability of mobile humanoid robots, the dynamitic model is built. By using the zero moment point, dynamic effect of the waist is obtained. A basic control method of whole body cooperative dynamic moving is proposed that uses waist cooperative motion to compensate for moment generated by the trajectory of the arms and the correctness of analysis is verified by experiments.
The Experimental Study on Wireless Short Distance System for Downhole Data Transmission
Authors: Wang Han Xiang , Lou Hui , Li Lin , Hou Nai He , Zhang Jian , Liu Yan Xin
Published: February 2011

Under the conditions of downhole closure in oil well, the wired transmission of the data signal including downhole temperature and pressure cannot be achieved. To solve this problem, an experimental study of short distance wireless system for downhole data transmission was launched. This technology is based on the means of electromagnetic coupling to achieve the wireless transmission of signals by leaps and bounds. Through the test bench of the wireless electromagnetic short pass system, we carry out the frequency characteristics of the transmission channel experiments, and provide the foundation for the design of downhole power supply lines and the selection of the electronic components. The tests show that the output characteristics of the downhole wireless signal transmission system are stable. They did not change with the excitation voltage, and the transmission frequency band between 50-100 KHz is better.
Researching on Fuzzy Control System of Jigging Discharge Based on PLC
Authors: Chen Yu
Published: February 2011

Fuzzy control is a nonlinear control strategy based on fuzzy inference. It shows the people’s operational experience and common sense rules of inference through fuzzy language. For the jigging discharging system, its overall structure and the necessary hardware and software in the process of controlling are designed. And then, the fuzzy control of jigging discharging system is actualized based on S7-300 PLC. After on-site commissioning, the control system can meet the site requirements.
Analysis and Simulation of the Shear Deformation for Woven Cloth
Authors: Chen Liang , Zhao Shu Guang , Zhang Li Juan , Zhang Li Qiang , Zhang Wen Bing
Published: February 2011

Woven fabrics are used in a wide variety of products, and they are prized for their flexibility, formability, and high specific strength. However, modeling woven cloth is difficult due, in particular, to complex mechanical properties. In this paper, the shear behavior of plain woven fabric is studied. Through the analysis, a mechanical model is proposed which take the shearing properties into account. It uses physical-based model for animating cloth objects. Furthermore, we demonstrate the efficiency of this method with examples related to accurate cloth simulation from experimental shear curve measured on actual materials.
Analysis and Modeling of the Harmonic Compensation Errors Based on PWM Converters
Authors: Wang Xue Dan , Gao Bai Chen
Published: February 2011

Compensation effects of the active power filter based on PWM converters are mainly affected by two factors: ① time lagging of reference compensation current; ②The dynamic limit of switching device themselves, that is, the limit of max di/dt of filter power output. This paper has presented the error models which are used to evaluate the compensation errors of the two main limitations, and has studied various factors influencing the di/dt capability of converters by the experiments. The experiment results showed that the accurate compensation error models are different when the structure of the converter, the load type and the current controlling way are distinct. But the research work can be done by the similar methods: the size of the compensation errors can be determined by the actual compensation current curves, the area between average lagging reference current curves. Further more, the ideal compensation current can be observed as time function. Finally, the paper has verified the validity of the estimation error model by the experimental study changing the circuit parameters.
Dirty-Face Game Analysis on Mixed Traffic Flow at Unsignalized Intersection
Authors: Wang Lu , Xie Neng Gang , Meng Rui
Published: February 2011

Mixed traffic flow is the basic characteristic of urban traffic. In pedestrian crosswalk without signals, there are a lot of traffic conflicts between pedestrians and vehicles crossing the intersection, which badly affects the traffic capacity and increases security risks. Through an analysis on the behavior pattern of pedestrians and vehicles crossing through the crosswalk, the paper first proposes a model based on dirty-face game to study the behavior characteristics of intersection traffic, which perfects analysis approaches to the traffic capacity of road crossing and the mixed traffic flow theory.
Application of Non-Negative Tensor Factorization in Intelligent Fault Diagnosis of Gearboxes
Authors: Peng Sen , Xu Fei Yun , Jia Min Ping , Hu Jian Zhong
Published: February 2011

In this paper, a novel approach is proposed to extract features from the bispectra of mechanical fault signals using non-negative tensor factorization (NTF) for the purpose of establishing an intrinsic relationship between mechanical faults and extracted characteristics. First, the bispectra of mechanical signals are obtained and stacked to form a three-dimensional (3D) tensor. Then, an NTF method is applied to extract features, which are represented by a series of “basis images,” from this tensor. Finally, coefficients indicating these basis images’ weights in constituting original bispectral images are calculated for fault classification. Experiments on fault datasets of gearboxes showed that the results of the proposed method not only reveal some nonlinear features of the system, but also have low data dimensions and intuitive meanings with regard to fault characteristic frequencies, which bring great convenience to an explanation of the relationship between mechanical faults and the corresponding bispectra.
Research and Development of UG-Based CAD/ CAM System for Turbine Blade
Authors: Ren Fang Jie , Zhou Shi Quan , Li Jian , Wan Zhi Qian , Zhao Yi , Liu Yi
Published: February 2011

A CAD/ CAM system has been developed for turbine blade’s manufacturing based on the software of UG in accordance with a type of static blade of China Chang Jiang Energy Corp. (Group) in this paper. According to a few parameters input by users, the system automatically generate three-dimensional geometric model of the blade, and through its CAM module, it automatically generates the CNC track for four-axis CNC machining center. A management system has been developed by using UG / Open API, MFC, and database technology so as to improving the design efficiency in the UG.
Research Based on Barycenter Identification about Array Haptic System Pressure and Temperature Information
Authors: Bai Yu , Hou Yun Hai , Chen Zhi Wei , Song Yong Jun
Published: February 2011

Robot touch sensation is an important feeling pattern for robots to gain environment information in non-vision sensor domain, in this thesis, the writer uses silicon piezoresistive sensor to form Array haptic system, and form gray level image from collected pressure and temperature information, and judge the slippage condition of objects through image preprocessing, region segmentation, centroid identification, and show the result picturesquely by using image. The experimental result shows that this method can fastly and effectively judge the slippage condition of objects, and it can intuitionally shows the condition of distribution of object temperature.
Research on the Absorption Characteristic of Three-Layer Microperforate Plate of the Automotive Body
Authors: Zhu Cong Yun
Published: February 2011

Three-layer micro perforated plate of the automotive body is researched. Acoustic impedance of the three-layer microperforated plate of the automotive body is attained according to the equivalent circuit, thus absorption coefficient is attained. Different microperforated plate with different porosity, different diameter, different thickness, different depth of cavity of the automotive body is analyzed and some conclusion is drawn to applied some theory to design these types of the micro perforated plates of the automotive body.
Modeling and Simulation of Pneumatic Impactor for Tubing Plugging
Authors: Sun Wei , Meng Guo Xiang , Ye Qian , Xie Wen Hua
Published: February 2011

Tubing plugging often occurs and brings some difficulties to industrial production. This paper proposes a simple pneumatic impactor which can instantaneously generate great acceleration by a reservoir to shock and smash calcium monohydrate bonding in the tubing inwall. The working principle and the mathematical model of the impactor are introduced in detail. In order to obtain its dynamic characteristic, the simulation is performed. The results show that during the movement of the piston back pressure occurs due to the outlet chamber squeezed by the piston with a high speed, and with inlet pressure increasing positions of the piston with different peak velocities are almost the same. This impactor can be used to unplug tubings in oil or gas well.
New Method of Improving Intake Port Flow Characteristics in a Four-Valve Engine
Authors: Zhang Shi Qiang , Li Zi Qin , Wei Xue Li , Wang Hui Gang
Published: February 2011

A 1arge-scale tumble rather than swirl would exist in the cylinder in the case of two valves’ opening in a four-valve engine. A strong swirl was generated when one valve is closed, but the flow capacity was less than that of two valves opening. In order to change it, achieving different lifts of valves (DLV) was present. Both tumble and swirl would exist in the cylinder in the case of different lifts of two intake valves, and flow capacity will hardly change.
Analysis on the Shifting Performance of the Hydraulic System of a Transmission for Construction Machinery
Authors: Li Yan Min , Liu Zhi Hua , Wang Dong , Zhang Yong
Published: February 2011

The paper discusses the performance of a hydraulic system controlling the shifting action of a construction vehicle transmission. Based on the principle of the hydraulic system of the transmission, a simulation model of the hydraulic system is established using AMEsim software. The simulation results indicate that the double-step hydraulic cylinder structure has an advantage of a fast, smooth and reliable shifting. The shifting connecting and separating overlap time of two clutches can be controlled precisely by an electronic joystick. The fast response speed can be ensured because using screw-in cartridge valves acting as the directional valves. Some techniques of improving the shifting quality are obtained. There is a great reference for the construction vehicles’ transmission in the future.
Fluent Based Numerical Analysis of Eliminating Ultra-Limit Gas in Upper Corner by Using Rotary Jet Fan
Authors: Chen Jing Yuan , Fan Xiu Qin , Liu Zheng
Published: February 2011

For the problem of gas accumulation in upper corner of "U" type ventilation system mining face, a new approach to eliminating gas accumulation in upper corner of coal mining face by using high-speed rotating jet is proposed based on flow law of rotary jet and actual environment of coal mining face. The numerical simulation with Fluent software is carried out. The results show that when fan is mounted close to the wall, the high-speed rotating jet has good Coanda effect, little impact on air flow structure of coal mining face, and is significantly effective to deal with gas accumulation in upper corner. FLUENT based numerical simulation provides a theoretical basis for actual application of rotary jet fan in coal mining face.This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.
Research on Control Strategy for Energy-Saving Optimization Algorithm of the Hydraulic Hybrid Vehicle
Authors: Chen Yan Li , Liu Shu Nan , Shang Tao , Liu Jia Lin , Zhang Yuan Kun , Xie Dan Tong
Published: February 2011

A new structure of hydraulic hybrid vehicle (HHV) with hydraulic transformer (HT) was built and the working principle of the new hydraulic hybrid vehicle was described. According to the operating characteristics of HT and energy-saving optimization conditions of accumulator used the HHV; Energy-saving optimization control algorithm with various operation conditions in different working conditions of vehicle was established. Then, simulation analysis to control performance of energy-saving algorithm was carried out using PID, Fuzzy Logic Controller (FLC) and Fuzzy-PID control strategy. Results show that Fuzzy-PID controller has a small influence on the parameters of energy-saving optimization algorithm of the hydraulic hybrid vehicle and maximizing energy recovery can be achieved in different energy states by Fuzzy-PID controller.
Flow Distribution Prediction of Gas-Solid Two-Phase Flow in Y-Shaped Branch Pipeline
Authors: Duan Guang Bin , Liu Zong Ming , Wu Wei Xiang
Published: February 2011

This paper reported characteristics of gas-solid two-phase flow for a Y-shaped branch pipe. Y-shaped branch pipeline with one fixed and one adjustable branch angle was built up. Micro-glass bead and millet particles with similar diameter and different solid density were conveyed in this experimental system. As a result, trend of solids mass ratio flowing in changeable branch was used to predict flow distribution characteristics experimentally. It was found that the solids flow distribution of the two materials had similar trend and were significantly affected by the branch angle and gas velocity. Finally, a calculating equation to predict the solids flow distribution of branch pipe was achieved based on experimental data, which had good accuracy.
Pressure Drop of Y-Shaped Branch Pipe in Gas-Solids Flow
Authors: Liu Zong Ming , Duan Guang Bin , Chen Guang Li
Published: February 2011

This work concentrated on being able to predict the resistance properties of Y-shaped branch pipe in gas-solid two phase flow. Y-shaped branch pipeline with one branch angle keeping constant and the other being changeable experimental system was built up. Micro-glass bead and millet with similar particle diameter and different solid density were conveyed in the experimental system. As a result, trends of pressure drop on each branch pipe were expressed to perform resistance properties. It can be concluded that pressure drop of the two materials had similar trend and was significantly affected by the branch angle and gas velocity. Meanwhile, the deposition velocity was defined in this study. The relationship between the solids loading ratio and pressure drop on each branch pipe was given based on experimental data, which agreed the theoretical analysis well.
Research on the Flows of Backspin Movement in Table Tennis
Authors: Chen Yu Fen , Fang Te Hua , Huang Chen Chih , Liu Chien Hung , Hsieh Wen Hsiang
Published: February 2011

This study discuss the distribution of the flows when the forced convection impacted on the spin and the static in table tennis; the research method is using the thermal flow in the experiment which the thermal flow will reflect according to the imaging principle when it passes through the spin sphere; this can be used to simulate the flows of balls in static condition and backspin ball in high-speed and low-speed rotation; the air flow passes through the spin sphere and generates the ball pressure which forms the quality variation of the spheres in table tennis competition; the results showed that it has a lower drag force, low fluid momentum and lower rectilinear speed when the sphere is in static condition , low Reynolds number; on the contrary, it has a higher drag force and increasing rectilinear speed of flows when the Reynolds number is high. When the ball is in backspin condition, the flows are symmetrical presented, and then the flows are gradually distributed, asymmetrical presented and are upward. The higher the Reynolds number is, the smaller the wake region is due to that the forced convection effect increased; the smaller the Reynolds number is, the ball will have more significant spin kinetic energy increasing rate when the spin speeds up.
Research and Analysis on the Multi-Point Piezoelectric Vibratory Feeder of Driving Mode
Authors: Wu Wen Fu , Zhang Li Hui , Yin Hui Min , Han Feng , Wang Gang , Shi Su Ping , Zhang Ya Qiu
Published: February 2011

The effect on the feeding rate and feeding stability of the multi-point piezoelectric vibratory feeder, of various factors such as driving mode, operating frequency and input signal phase difference is analyzed in detail through many experimental researches by means of the multi-point piezoelectric vibratory feeder developed by ourselves. It is found that the driving mode has critical influence on the conveying performance of the multi-point piezoelectric vibratory feeder. Symmetrical two-point, front single-point and rear single-point vibration sources, these three driving modes have their conveying performance relatively stable. However, three-point, asymmetrical two-point and bottom single-point vibration sources, these three driving modes have their feeding rate somewhat lower than that of the former three modes in the same conditions and their conveying performance is extremely unstable. In particular for the driving mode of single-point vibration source with the bottom close to the rear, conveyance of materials is almost impossible. The effect of phase difference is represented in the driving mode of multi-point vibration sources.
Mechatronic Cooperative Design and Simulation of a Multi-Axis Bar Tacking Machine
Authors: Xie Xiao Hui , Sun Qiang , Zhao Cui Cui , Ma Cui , Du Ru Xu
Published: February 2011

In this paper, a new method to design bar tacking machine is introduced. According to multidiscipline model design rule, mechanical, kinematic and control model of the bar tacking machine are constructed. Based on such models, a mechatronic cooperative design and simulation environment is setup by using RecurDyn and Matlab/simulink software. By analyzing the working condition of this machine and using them as the input, some working results can be got from the environment. Ideal output is reached by modifying the design schedule and parameter. By this method, designing efficiency is improved and the testing cost is reduced.
A Depth-Setting TUV Control System Based on RS-485 Network
Authors: Xu Guo Hua , Yu Kun , Shen Xiong
Published: February 2011

In order to boost the reliability of a floating TUV system, the research represents the central control system to be a Depth-setting TUV control system based RS-485 network. The paper will show the three aspect technology of this RS-485 network. According to the characteristics of the RS-485 network, the control architecture, the hardware structure and the communication protocol of this distribution system will be illustrated in the passage. Then, the passage will published the material object of the floating TUV. Given the experiment method and conclusion, it proves the distributed system is more stability, reliable, fast in response than ever in the last part.
SINUMERIK 802D Applied in the Transformation of Profiling Machine
Authors: Dong Peng Min , Liu Wan Bing , Wang Tian Qi , Dang Xiao Li
Published: February 2011

FASH160KE profiling machine manufactured in Germany is imported by our company in the late 1970s. The electrical element of this equipment is seriously ageing. What is worse, there have no substitution for AC drive, which will cause speed could not be regulated. Besides, the function of hydraulic pressure copying is beyond repair. We make CNC system reforming for this machine by using SINUMERIK 802D CNC and MICROMASTER-440 transducer. The wireless communication system
Design of DC Motor Control System Based on Clonal Selection Algorithm
Authors: Zhao Peng Bing , Shi Yao Yao
Published: February 2011

According to the multivariate, strong coupling and nonlinearity of the DC motor speed control system, and the traditional PID control is difficult to achieve the higher speed performance. Combining the clonal selection algorithm (CSA) with the traditional PID control, a kind of intelligent PID control system was designed. The controller realizes the real-time and online adjustment of PID parameters, thus, the dynamic and static performance and robustness of the DC motor control system was improved. The simulation experiment was processed based on MATLAB environment. Simulation results show that this intelligent PID controller achieves better performance than the traditional PID controller.
Design and Realization of Remote Monitoring System for Automatic Forced Fitting Production Line
Authors: Cui Jiang Hong , Zhang Xue Song , Zhu Ji Hua
Published: February 2011

In this paper, Aim at the lower degree of automation in forced fitting procedure between spindle blade and whorl in spinning machine, an automatic forced fitting production line is successfully designed. Based on PLC, the fully-automation control system to the production line is developed through analyzing the overall design scheme of the production line and the rapport between each workstation. Moreover, the remote monitoring system of forced-fitting production line has been implemented with the combination of powerful WinCC software with PLC technology.
Slider Position Servo Control of the Double Toggle Mechanical Press Directly Driven by Transverse Flux Machine
Authors: Xie Jia , Zhao Sheng Dun , Sha Zheng Hui , Liang Jin Tao
Published: February 2011

A slider position servo control system of the double toggle mechanical press is presented in this paper. The controlled mechanical object is described, and the velocity controller and position controller are designed. A claw pole transverse flux machine is used as the servo motor in the control system for its high torque and low speed characteristics. The results of the slider’s motion curves are obtained, which show that the control system effectively achieves the flexible manufacturing of the press.
Research on Heavy Rail Pre-Bending Vehicle Control Technology Based on Fuzzy Neural Network
Authors: Xu Zhi Jun , Yin Guo Fu
Published: February 2011

The natural cooling after the rolling of the 100-meter-long rail tends to curve the rail from the bottom to the head. Based on the analysis of the rail pre-bending process, this thesis proposes the implementation plan of the pre-bending vehicle control system. The position loop uses fuzzy neural network regulator and the speed loop uses PB-based neural network PID regulator. Also the thesis gives the corresponding control algorithm. The control equipment uses Siemens advanced SIMATIC PCS7 process control system. Through experimental analysis, the dynamic tracking performance and the static accuracy of the system are guaranteed and the vehicle is accurately placed as expected.
Research of CNC System for Ultrasonic Vibration Internal Grinding Based on Embedded Technology
Authors: Wang Bang Fu , Yin Zhen , Xie Ou
Published: February 2011

Based on the in-depth study of embedded systems technology and characteristics of the ultrasonic vibration internal grinding process, the new CNC system for ultrasonic vibration internal grinding based on ARM and μC / OS-II embedded was proposed in this paper. For this system, the kernel of hardware is the 32 -bit embedded CPU LPC2210 with characteristics of high performance and low power consumption. And it is also equipped with the required peripheral modules to extend itself to one whole hardware system and the interface Circuit. Its software is based on μC / OS -II real -time embedded operating system, and the required application software needs to be developed so as to turn μC / OS- II real -time embedded operating system into one practical embedded ultrasonic CNC internal grinding.
The Analysis in the Difficulty of Carrying on the Innovation Based on the TRIZ Theory
Authors: Wang Ke She , Liu Huan Li , Xu Yu Xiang
Published: February 2011

Although TRIZ has obvious advantages over other current known innovative ways in the following aspects: high-efficiency, high degree of controllability, the design staff still has difficulties in using the TRIZ tools, such as matrix technology to solve conflicts, TRIZ algorithm, or even combining the Inventiontool 2.0 Technology Innovative software to design creative programmers, value innovative programmers. This paper, on the basis of introducing the TRIZ theory, analyzes the characteristics of TRIZ theory, introduces the use and application of the process about a computer-aided software product of innovation --Inventiontool2.0, then point out the difficulties in the theoretical innovation based on TRIZ and bring forward the direction of amelioration.
Linear Interpolation Control of Numerical Control Machine Tools and its Realization Based on Multi-Axis Motion Control Card
Authors: Shi Xiu Min , Dai Yi , Liu Wei
Published: February 2011

The servo system consisting of PC computer, multi-axis motion control card, servo driver, servo motor and load was constructed. The paper studied the interpolation principle and edited the procedure of linear interpolation for two axis servo motors. After the communication between PC computer and servo driver based on the motion control card, the paper edited the control interface program calling the interpolation procedure, which could realize the simulation control and real time control to servo motors. The compare results show the control accuracy of the experiment is higher.
Thermal Fatigue and Fracture Mechanics Analysis of Aluminium Alloy
Authors: Zhang Wen Xiao , Gao Guo Dong , Mu Guang Yu
Published: February 2011

The in-phase and out-of-phase thermal fatigue of aluminum alloy were experimentally studied. The fatigue life was evaluated analytically by using the elastic-plastic fracture mechanics method (mainly J integral). The results of experiments and calculations showed that the life of out-of-phase fatigue was longer than that of in-phase fatigue within the same strain range. This is the same as the results of other materials such as medium and low carbon steel. On the other hand, the predicted life was consistent with experimental results. This suggests that J integral as a mechanics parameter for characterizing the thermal fatigue strength of aluminum alloy and the calculation method developed here is efficient. A parameter ΔW was proposed from energy aspect to characterize the capacity of crack propagation. The in-phase thermal fatigue life was the same as the out-of-phase thermal fatigue life for identical ΔW values.
Study on Expanded Food Quality Improving Based on Six Sigma
Authors: Mu Guang Yu , Li Li , Zhang Wen Xiao , Gao Guo Dong
Published: February 2011

This paper addresses on quality improvement of expanded food. The five stages of six sigma implementation process are applied to define the problem and set a target for improvement. Then possible causes to the quality problems in expanded food are investigated, and the capabilities of the measuring system are evaluated and improved. Based on the results, the experiment scheme is conducted to find and optimize the key factors. Improvement result shows that sigma level of production process increased to 4.6, which is beyond the expectation and can save the cost.
A Lamp Coating Temperature Field Calculation Method
Authors: Lin Kang
Published: February 2011

Surface of the lamp reflector are plated a layer of aluminum. It is hard to accurately establish calculate model when use finite element software to analysis the temperature field. For this reason, a new temperature field calculate model of aluminum layer is presented. And it apply to calculate the temperature field of front fog(084). Finally use temperature field experiment to verify that the calculate model of aluminum layer is correct.
Characteristics of Supersonic Projectile Shock Wave
Authors: Wu Yan Chyuan , Chang Ho , Tsung Tsig Tshih
Published: February 2011

This paper discusses characteristics of supersonic projectile shock wave in muzzle regions when firing high explosive anti-tank (HEAT) and high explosive (HE) projectiles. They are fired with a muzzle velocity of Mach 3.5 at horizontal from a medium caliber tank gun equipped with a new designed multi-perforated muzzle brake and of Mach 2 at elevation angles from a large caliber howitzer also equipped with a new double baffles muzzle brake, respectively. In the near field, pressure signatures of the N-wave generated from projectiles are measured by cotton sheathed 32-microphone ring array. Recordings measured from the microphone array are used to demonstrate several key characteristics of the shock wave of supersonic projectile. All measurements in this study can be a significant reference for developing guns, tanks or the chassis of fighting vehicles.
Study on Soil Consolidation Coefficient on CPTU Model Test
Authors: Tang Yan Chun , Meng Gao Tou , Mao Qiu Feng
Published: February 2011

Through analyzing excess pore pressure dissipation datum measured by CPTU probe and pore pressure mini-transducers on CPTU model test, the consolidation coefficient of soil of CPTU model test has been computed. Based on axis-symmetric consolidation model and Terzaghi consolidation theory, the computing equation of soil horizontal consolidation coefficient on CPTU model test has been acquired; on CPTU model test 50% degree of consolidation has been applied as calculate standard to compute soil horizontal consolidation coefficient, and dissipating time of 50% degree of consolidation can be acquired by normalized excess pore pressure dissipation curves based on excess pore pressure dissipation datum; through a series of indoor consolidation tests, the consolidation coefficient of remolded soil of CPTU model test sampling by horizontal and vertical direction has been acquired, and the results show that vertical consolidation coefficient is about 1.6 times greater than horizontal consolidation coefficient on indoor consolidation test, and large difference between horizontal and vertical property of remolded clay soil on CPTU model test has been existed; compared with the value of two test methods, the value of horizontal consolidation coefficient acquired by CPTU model test is roughly 100 times greater than the value of horizontal consolidation coefficient acquired by indoor consolidation test. The achieved result can provide a foundation for further study for CPTU mechanism.
Optimum Conditions of Pretreatment in Producing Bioethanol from Wheat Straw
Authors: Cui Li , Liu Zhong , Hui Lan Feng
Published: February 2011

The objective of this work was to evaluate the effect of temperature, alcohol concentration, time, catalyzer dosage and liquor ratio on organic solvent pretreatment of wheat straw. Organic solvent pretreatment is an effective method to remove lignin and make cellulose and hemicellulose degrade. Through experiments and analysis, the parameters of pretreatment were optimized as temperature 185°C, alcohol concentration 55%, reaction time 60min, catalyzer dosage 1.0%, liquor ratio 1:6.
Preparation and Performance of MoB/CoCr Coatings by LPPS on 20G Boiler Steel
Authors: Chen Xiao , Zhang Ren Yuan , Li Feng
Published: February 2011

MoB/CoCr, a novel material for thermal spraying, with high durability in molten alloys is used to resist erosion by molten Al-Si alloy in solar thermal power generation. The microstructure and phase component of coatings were characterized, and the coatings were also studied on bond strength and thermal shock resistance. The durability of the MoB/CoCr coatings prepared by low pressure plasma spraying (LPPS) has been investigated using a molten-metal immersion tester. The results showed that phase component of powder and coating had little change. The coatings have dense structure and excellent combination with substrate. The main constituents of coatings remain invariant and the coatings have excellent properties of bond strength and thermal shock resistance. The immersion tests revealed that the MoB/CoCr coating has much higher durability without dissolution in the molten Al-12.07wt.%Si alloy.