bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Temperature Stress for Contacts Reliability of Electric Connector
Authors: Du Yong Ying , Sun Zhi Li
Published: June 2014

Temperature induced degradation is a widely recognized failure phenomenon.However, the basic mechanisms that control the onset and progression of such behavior are not well understood and are a topic of considerable interest in the electrical connector community. In this paper, the simulation analysis of temperature field on this topic are described. The distribution graph of temperature field for the electrical connectors and the highest temperature of the surface of electrical connector was achieved by analyzing a single blade/receptacle contact pair FEA model. A mathematical model was developed that related the early stage temperature levels for the connectors.Additionally, the thermal deformation caused by the temperature had little effect on the contact stress based on temperature - structure coupling field analysis for the electrical connector, the impact of temperature on the electrical connector was mainly reflected in the rate of oxidation of the metal surface. The failure physical process of the electric connector was drawn under temperature stress through the model and theory analysis for the electrical connector , and reliability growth program of the electrical connector was achieved under the temperature influence. The same transfer functions for one type of contact pair were obtained from the simulation, and the results showed that for this limited system, finite element modeling and analysis have great potential for evaluating the influence of design variations on degradation behavior.
Signal Acquisition and Analysis of Shaft Unbalance Vibration Test
Authors: Zhang Hai Peng , Chen Hong Wu , Hu Bin , Tian Cheng
Published: June 2014

This paper simulated the unbalance vibration conditions by the vibration test platform, measuring some common characteristic parameters of unbalance vibration fault diagnosis. This paper chose the time-domain analysis method, processing the characteristic parameters of the test, so as to achieve the purpose of vibration diagnosis. Through a large number of experimental data, this paper verified the feasibility and the effectiveness of the proposed approach to the unbalance fault diagnosis. The method proposed in this paper not only can be applied to unbalance fault diagnosis, but also can be promoted to apply to the fault diagnosis of other rotating machinery.
An On-Line Condition Monitoring System for Oil Film Bearings of Cold Rolling Mill
Authors: Sun Bo , Cao Heng
Published: June 2014

An on-line monitoring system of hydrodynamic lubricant supply conditions for the back-up roll’s oil film bearing of 1420mm cold rolling mill was developed for providing real time monitoring so as to avoid unexpected breakdown of the production line. The monitoring parameters of supply pressure, supply temperature and supply flow rate show that the monitoring system software with real-time event trigger mechanism and intelligent storage algorithm solves the issue of data overflow in the continuous record and ensure the safety of data transmission. Test results for hydrodynamic lubricant supply conditions in the industrial production are reported, which indicated that established software architecture and programming methods construct a stable and reliable monitoring system, which provides early warnings for the safe production.
Reliability Analysis of Cold Standby Compound System
Authors: Xu Jiang Jun , Xiao Zhi Jian
Published: June 2014

for researching standby Compound system,the authors propose a new Laplace transform method which are used for deducing mathematical expression of system reliable lifetime 。The reliability function is simulated with MATLAB software and analyed,The results show that this method is not only effective but also simple and practical.
Finite Element Analysis and Improvement of Traverse Table Platform Based on Workbench and Pro/E
Authors: Li Jin , Ren Guang Sheng
Published: June 2014

According to amonoral parking space in traverse table platform technology parameters requirements and structural characteristics, the use of Pro/e software established structure model and imported into the finite element analysis software analysis Workbench, steel structure of the static analysis. Calculated the steel structures in design load maximum deformation.The results show that, by pro/E a structure model and the calculation method is reasonable, the calculation is of high accuracy, profile choose the proper size, structure deformation meet the design requirements.
Modified Stress Severity Factor Method Based on 3D-FEM
Authors: Yang Xiao Hua , Liu Xue Jun , Hu Zhao
Published: June 2014

The traditional stress severity factor (SSF) approach was applied to analyze the life of aircraft multi-fastener joint. 3-D model was established under simulated state of practical assembling using CATIA, and then the model was imported into ABAQUS to analyze the detail stress state of aircraft multi-fastener joint. The life of aircraft multi-fastener joint was estimated by amending the SSF method. The example shows that the fatigue life by the approach is closer to the experimental result.
Study of Anchor Bolt Support in Deep Hard Roof of Roadway of Tangshan Mine
Authors: Zhang Rui Xi , Lv Yu Kai , Jiang Cong
Published: June 2014

Traditional trellis support was mainly used in deep mining roadway of Kailuan group. With the increase of mining depth, section of roadway and deformation of surrounding rock also increased gradually. As a passive support ways of roadway, trellis support had been unable to meet the requirements of high yield and high efficiency comprehensive mechanized mining. Therefore, anchor bolt supportis in urgent need to turn passive support into active support and to ensure the safety and the stability of surrounding rock of roadway, meanwhile, the cost saving and boosting yield was made sure. This paper is based on the physical and mechanical parameters of coal seam roof and floor of working face 1357w, numerical simulation method was took, and the parameters of anchor bolt support suitable for the roadway with working face were also studied. The result of study could provide theoretical basis for later projects.
A Stress-Strength Interference Model with Strength Degradation Following a Gamma Process
Authors: Shen Jian Cheng , Liu Li Mei , Jiao Ai Sheng , Yi Xiang Bin
Published: June 2014

Stress-strength interference model has been widely used for reliability analysis of structures.Strength degradation of a structure is a common phenomenon in engineering. To evaluate the structure reliability in the case of strength degradation over time, the strength degradation is represented by a gamma process and the stress applied on a structure is represented by the Poisson process in this paper. Then a time-dependent stress-strength interference model is suggested by employing numerical integration method. With this model, the structure reliability can be evaluated more accurately.
Thin-Walled Cross-Sections and their Joints: Tests and FEM-Modelling
Authors: Vatin Nikolay I. , Havula Jarmo , Martikainen Lassi , Sinelnikov Aleksei S. , Orlova Anna V. , Salamakhin Stepan V.
Published: June 2014

This summary report is based on the experimental and numerical research of thin-walled cross-section’s compression resistance and shear strength of their joints carried out in St. Petersburg State Polytechnical University and HAMK University of Applied Sciences, Sheet Metal Centre. Current situation on Russian market concerning the usage of cold-formed thin-walled cross-sections is aimed to find out a base foundation to start up a stipulation of the elements under discussion in the building industry (Kolesov et al. 2007; Peleshko, Urchenko 2009; Zhmarin 2012). Some questions about the compression resistance of such cross-sections were raised on different conferences (Vatin, Sinelnikov 2013; Winter 1952; Yu Wei-Wen et al. 1996) by scientific community and by companies such as Rautaruukki Oyj (Finland). Steel galvanized C-and U-profiles and thermo-profiles are types of thin-walled cross-sections that are normally used in small houses construction (Shatov 2011; Smaznov 2011). Thermo-profiles have slots in web that decrease the thermal flow through the web, but have a negative effect on strength of the profiles (Schafer, Pekoz 1998; Vatin, Popova 2006). These profiles were an object of the research. Investigations carried out included tests to prove the compression resistance of the thin-walled cross-sections and shear strength of stud-to-rack joints. Numerical modelling of thin-walled cross-sections (Cheng, Schafer 2007) was done with contemporary analysis software (SCAD Office, Lira) (Kriksunov et al. 2010; Perel'muter et al. 2009) using the finite element method (FEM) (Bayan et al. 2011; Gordeeva, Vatin 2011; Rasmussen 2009).
Evolutionary Structural Optimization Using the Minor Value of Material Efficiency
Authors: Hu Xing Guo , Cheng He Ming
Published: June 2014

In the tradition Evolutionary Structural Optimization (ESO), the maximum value of inefficient material efficiency equates to the product of the rejection rate and the maximum value of all material efficiency. However, the rejection rate cannot be adjusted flexibly according to the trend of optimization, and the maximum value of all material efficiency may mutate abruptly (become larger or smaller). These two factors may cause that material may sometimes be removed less, sometimes too much. In view of the defect of the traditional evolutionary structural optimization, the Evolutionary Structural Optimization Using the Minor Value of Material Efficiency (ESO-MVME) is proposed in this paper. The maximum value of the inefficient material is close to the minimum value of material efficiency, and has nothing to do with the reject rate and the maximum value of material efficiency. The study finds that the ESO-MVME method has a better applicability than the traditional ESO, and can obtain a better optimization result.
Structure Design and Antiknock Performance Analysis of New Mine Refuge Chamber
Authors: Gong Xiao Yan , Gao Xin , Guo Jun , Xu Jun , Chen Chao Ming
Published: June 2014

In order to solve the potential safety problem due to the explosion of coal mine caused the severe deformation of the front door not being opened normally and the emergency escape hatch was designed unreasonably, three types of structure model with emergency escape hatch being set in transition compartment as entrance and different locations of life supporting compartment as exit, which can avoid the potential safety problem above mentioned. Numerical simulation of antiknock impact performance of the three refuge cabins were calculated and analyzed by using the finite element software of LS-DYNA.The results indicated that the antiknock performance of structures could reach specifications, which could provide a new idea for the development of mine refuge chamber cabin.
Optimization and the Dimensional Analysis in Structural Engineering Problems
Authors: Seko Eugeniy V.
Published: June 2014

this paper considers the possibility of applying the ideas of dimensional analysis in optimization problems of building structures. The mathematical formalism for this opportunity are encouraged to use the method of geometric programming. Demonstration considered optimization problem reinforced concrete slab, which is solved with the help of the program developed by the author. The possibility of obtaining as a result of optimization of analytical expressions for the economic criteria of similarity best options. Also shows the possibility of obtaining optimal solutions in analytical form for those variables in the original problem are not uniquely defined. The very ambiguity of the definition of the variables of the original problem may not be obvious, and it appears in the process of optimizing, which is one of its results.
Intensity Design and Analysis of the Underwater Instrument Cabin Shell
Authors: Wang Yuan Sheng , Lu Gui Ying , Zhou Chao Xin , Yu Juan
Published: June 2014

This paper presents intensity calculation of the cylinder block of the underwater instrument cabin which has outer diameter of 220mm, thickness of 7.5mm, and length of 1660mm. With simplifying force of the cylinder block to the problem of elastic plane stress, its’ internal stress is calculated under internal pressure and external pressure, in the case of the simulation tests and working state. Calculations and simulation indicate that: its’ maximum internal stress exceeds the elastic yield limit at 30MPa, and the cylinder block cannot work in 3000 meters underwater. At the same time, it proves that the maximum internal stress first starts from the inwall of the cylinder block with the method of using internal pressurization test, which is consistent with the working state, but because the maximum internal stress in the test state is less than the maximum internal stress in the working state, the test method may misjudge. Finally, through calculation, it is specified that the theoretical work water depth of the cylinder block is 1300 m and the axial deformation is about 0.5 mm, radial deformation is about 0.1mm, which provides reference for the seal design.
Analysis and Preventive Measures of Offshore Steel Structure Welding Crack
Authors: Zhang Sheng Qiang , Zhang Hui Chi , Li Mo Lin , Xu Wei
Published: June 2014

In recent years, offshore oil & gas industry developed rapidly. Offshore steel structure is the support structure for offshore drilling and production platform, and its welding quality is particularly important in fabrication. This paper aims at the typical welding crack of offshore steel structure, through investigations and experimental analysis, considering the application characteristics of offshore steel structure and site issues, analysis the root causes of welding crack and give the improvement and prevention measures.
Design of High-Speed Moving Point Target Measurement System
Authors: Lv Qiong Ying , Sun Yu , Zhang Dan Dan , Mei Yu Shi , Tao Xi Jia
Published: June 2014

In view of the geometry, the area of movement and measurement form, put forward the measurement way and method.Laser sensor scans the same area many times in a preset time ,increased the probability of capture the target by optical imaging principle; Tear down analytical expression of the model, system layout by matlab, analysis of the experimental data by Labview. System can satisfy the demand of practical engineering by simple structure, convenient operation, and good stability.
Structural Damage Detection and Classification Algorithm Based on Artificial Immune Pattern Recognition
Authors: Zhang Dong Wei , Mao Yong Ming , Kan Feng Long , Chen Nan
Published: June 2014

This paper studies the structural damage detection and classification problems by using the artificial immune system which has the extremely powerful capabilities of adaptive and the bionic principle between learning and memory. We proposed an artificial immune pattern recognition and structural detection classification algorithm through imitating the immune recognition and learning mechanism. With the structure of benchmark, the damage detection and classification are tested. The simulation results show the classification rate is very well. The algorithm based on the immune learning and evolution can produce the high quality memory cells which effectively identify all kinds of structural damage model.
Study on Elasto-Plastic Response of the Unsupported Random Launching Site for the Missile
Authors: Ren Jie , Zhou Xiao He , Ma Da Wei , Zhong Jian Lin
Published: June 2014

The elasto-plastic response of the launching site for a missile during the launching phase is studied. Firstly, simulate the asphalt concrete layer with Drucker-Prager/Creep creeping model. Secondly, the finite element model of the launching site is built. Finally, research the elasto-plastic response of launching site under the launch canister under catapult load. The results show that: integral subsidence appears in the unsupported random launching site under catapult load, the sedimentation value of the center point is greater than that in the edge of the launching site under catapult load, the edge of the launching site is higher as a whole than the middle, the stress at the edge of the catapult load is the greatest, the instantaneous stress of the center point under catapult load is the greatest when the launching load finishes.
Algorithm of Multi-Causes Process Quality Diagnosis Using Binary Tree and Intermediate Quality
Authors: Niu Qing , Mo Rong , Wan Neng
Published: June 2014

Process quality control is the core in product’s quality management. To solve the problem of multi-causes process quality diagnosis in manufacturing, an algorithm based on binary tree of quality cause set and intermediate quality is proposed. Firstly, the set of quality cause is divided progressively to form a complete binary tree, and then every node of subsets is chose as non-control cause set to construct the cause-selecting control chart of the intermediate qualities in its parent node. In diagnosis, control charts with same parent are compared to narrow the scope of abnormal quality causes until they are confirmed. Practice proves that the proposed algorithm can make the procedure of quality cause judgment independent to the adjustment, thus the comparison times of control charts could be greatly reduced and the efficiency of diagnosis is highly promoted.
Design and Analysis of a Linear Ultrasonic Motor with Composite Bending and Torsional Vibration Modes
Authors: Wang He Long , Chen Wei Shan , Liu Jun Kao
Published: June 2014

A new type linear ultrasonic motor using Second-order bending and First-order torsional modes (2B-1T) is proposed. The ultrasonic motor has two driving feet and the continuous linear motions of sliders are realized by the frictional force between stator and sliders. In this new design, bending vibration is excited by d33 mode, which controls the preload pressure, and torsional vibration is excited by d15 mode, which generates the driving force. The elliptical trajectories of both feet are achieved, when the phase difference of the two modes is 90° in time and space. The working principle of ultrasonic motor using 2B-1T is simulated. A parametric model of the stator is designed. The sensitive analyses of structural parameters are gained with modal analysis. The characteristics and trajectories of driver feet are studied by transient analysis. These results can provide theoretical basis for the development of this new type ultrasonic motor.
Powertrain Simulation Research of Coaxial Series-Parallel Hybrid Electric Bus
Authors: Pei Dong Jie , Qin Dong Chen , Pan Shou Chen
Published: June 2014

In order to know the vehicle performance of coaxial series-parallel hybrid electric bus, on the basis of the analysis of the powertrain’s structure and operation mode, the control strategy is made, the simulation system is introduced by the secondary development of Advisor, the simulation result is analyzed and used. Through the analysis of vehicle dynamic performance, fuel economy, SOC value change of super capacitance, and the torque relations of main components, it is known that coaxial series-parallel hybrid electric bus can satisfy the requirements of the city bus’ working condition, and the operation relations between the power components can be mastered, which provides the technical support for the coaxial series-parallel hybrid electric vehicle development.
Design of Robot Obstacle Surmounting or Avoidance with Two Arms in Unknown Environment
Authors: Li Lin , Guo Lei Yu
Published: June 2014

For performing the best motion capability in complex environment of robot with two swing arms, the motion strategy of obstacle surmounting or avoidance is used with four infrared sensors information. The motion mechanism is analyzed to build the relationship of step height and arms swing angle and the forward and backward step-climbing process is draw. The hardware system is built by chuang yi zhi xing modular robot and the experiment result shows that the robot can move in more complex environment.
Mechanism Design Method for Obtaining a Cylinder-Like Objects Pose and Position
Authors: Luo Lei , Chen Ken , Chen Jian Hua
Published: June 2014

The measurement of pose and position is the key technology for Explosive Ordnance Disposal (EOD) robots intelligence level. This paper presents a mechanism which using a laser distance sensor (LDS) to measure a cylinder-like objects pose and position. The mechanisms structure, constitution and measure principle are described in details. Calculation method and formulas are also given. Only two points position is needed to measure an ammunitions pose and position synchronously by the given mechanism and algorithm. Satisfied precision could be achieved by applying the mechanism and stereo vision to Explosive Ordnance Disposal robot to recognize ammunitions pose and position. The measure data can be used to guide the robot arms route planning and autonomously movement.
Development on Experimental System of Kinematic Performance of 3-TPS Hybrid Robot
Authors: Shi Jia Shun , Wang Kai , Zhu Li Da , Wang Wan Shan , Yang Jian Yu
Published: June 2014

Hybrid robot combines the advantages of serial and parallel structure and has the characteristics of large workspace, agile kinesis, good stiffness, compact structure, good kinematic performance and so on. To conduct the research on the performance of hybrid robot, this dissertation develop an experimental system based on the new 3-TPS hybrid robot which is develop by the research institute of advance manufacturing technology and automation in Northeast University to drive the robot and examine the operational position, and it is also applied in the demarcate experimental of 3-TPS hybrid robot. Through the application, it draws a conclusion that the experimental system has the characteristics of simple structure, good function, good compliance, simply to operate, high reliability and low cost. Consequently, it has high value of popularization and application to conduct the experiment and research on hybrid robot.
Optimal Camera Placement of Large Scale Volume Localization System for Mobile Robot
Authors: Wu Ying Feng , Li Gang Yan , Yan Huan
Published: June 2014

Large Scale Volume Localization System (LSVLS) is applied widely in industry. Large Scale Volume Localization System with camera network has appropriate precise and cost, which is a promising system in metrology and localization in industry and lives. Optimal camera placement is significant to lower cost and facilitate target’s auto-control for mobile robot in the large workspace. The author optimized cameras placement with their relative position algorithm (RPA). The result of optimal camera placement enhances greatly the efficiency of camera placement in LSVLS and is verified with a model of field-winding mobile vehicle.
The Kinematics and Dynamics Analysis of Rescue Robot Based on Adams and Matlab Simulation
Authors: Xu Zhe , Gao Jun Yao
Published: June 2014

The rescue robot adaptive to tough terrain is in great demand. The robot can be summarized as wheeled, tracked, legged and hybrid robot. In this paper, a hybrid robot is proposed to satisfy the rugged terrain with obstacles. The triple-legged wheel unit designed for the robot is introduced, which can work in two modes in a simple mechanism. A mechanical structure of the unit is shown and the kinematics of it is studied. With an emphasis of the dynamics of the robot, the peak torque needed is calculated. The simulations in Adams and Matlab show that the robot is able to negotiate obstacle that inaccessible to wheeled robot. The angular velocities and torques of traction input shaft is analyzed to obtain the maximal torque demanded, which is similar to the calculation. Additionally, the selected drive system is sufficient to power the robot. The robot can vary its modes of motion smoothly and automatically, allowing it to adapt to tough terrain with obstacles. This releases the burden of the complex sensors to detect the terrain.
Research of Design Synthesis for MEMS Device of Serpentine Spring
Authors: Wang Hu Qi , Lu Yang , He Hai Zhao
Published: June 2014

The design synthesis of MEMS device is an inverse problem of the MEMS analysis. The performance analysis equations are transformed to the performance design equations according to the predetermined performance. The Direct Solution Algorithm derived by the Newton iterative method is used to solve the nonlinear performance design equations, and then the MEMS device will possess predetermined properties. The serpentine spring was synthesized with this method. The computational efficiency and accuracy is greatly improved by comparison with the foreign natural simulation optimization algorithms of the genetic algorithms. The genetic algorithms needs tens of thousands of times analyses, the relative error of the calculation is 1%, but this method only needs dozens of analyses and the relative error of the calculation is 0.01%.
Size Optimization of a Weight-Balanced Haptic Device
Authors: Niu Xi Ye , Zhao Chen , Wang Hua
Published: June 2014

A size optimization is performed to a weight-balanced haptic device. Firstly design requirements for mechanical parts of haptic devices are summarized. After analyzing factors influencing force-reflecting accuracy, a basic idea is got that the device should be weight-balanced and should have minimum apparent mass while keeping certain stiffness. Then a simplified model is got for the prototype and apparent mass and stiffness is analyzed and expressed in terms of variables based on the simplified model. With link cross section set to be circular tubes, an optimization is done to find link diameters and wall thicknesses with lowest apparent mass and given stiffness. At last the optimization result is analyzed and the model is proved to be reasonable.
Kinematic Simulation of Serial Mechanism Based on ADAMS
Authors: Qi Xiao Yan , Pan Chun Xiang , Chen Gui Qin , Li Xiang
Published: June 2014

Kinematics analysis of mechanism refers to analysis for pose、speed and acceleration of mechanism end manipulator. In this paper, the manipulator of MOTOMAN UP50 is firstly regarded as object, then setting up its pose equation by way of D-H, simulating its kinematics by software of Adams, the real time results of pose、speed and acceleration of robot in different conditions have been obtained. Therefore, it makes sense in kinematic performance of joint robot and prepares for further research of kinetic and controlling properties.
Improving Navigational Accuracy for AUVs Based on an Adaptive Modified Square-Root Cubature Kalman Filter
Authors: Sun Chen , Li Jian Long
Published: June 2014

This paper addresses an adaptive modified square-root cubature Kalman filter for the navigation of autonomous underwater vehicles (AUVs). The standard square-root cubature Kalman filter (SCKF) implements the CKF using square-root filtering to reduce computational errors. It can be modified due to the nonlinear system with a linear measurement function. The modification leads to a decrease computational complexity. Sage-Husa noise statistics estimator is combined with the Modified SCKF to estimate the unknown and changing system process noise variance. The experimental results show that compared with the MSCKF and the EKF algorithm, the adaptive MSCKF show the best accuracy for a real system with unknown process noise variance.
The Mechanism and Transmission Design of Robotic Fish in Coal Mine
Authors: Dong Zhi Feng , Deng Jing , Tang Ji Tuo , Wang Qiang Qiang , Li Qiang
Published: June 2014

After coal mine flooding accident, the complexity mine environment caused rescue difficult, the paper proposed using robotic fish in the accident to do the detection. The basic configuration of the robotic fish was designed based on the fish propulsion mechanism, and the transmission mechanism was especially designed. Then, the mechanism kinematic analysis, and the mechanism motion curves were simulated using MATLAB, and a detail analysis of the transmission process of caudal fin system and the check of the motor torque were accomplished.
Modeling of Rotating Piezoelectric Vibration Energy Harvesters with Nonlinear Magnetic Forces
Authors: Guo Bin , Chen Zhong Sheng , Cheng Cong Cong , Yang Yong Min
Published: June 2014

A methodology of rotating vibration energy harvesting with nonlinear magnetic forces is studied in this paper. A mathematical model of rotating piezoelectric vibration energy harvesters with nonlinear magnetic forces is built by the Lagrange’s equation and assumed-modes method. The nonlinear model is solved by numerical methods. Then the effects of distance between two magnets are studied. The results demonstrate that the performance of rotating piezoelectric vibration energy harvester with nonlinear magnetic force is better than traditional linear ones when the distance between two magnets is appropriate.
Rig Test and Analysis of Dynamic Engagement Process of Wet Clutch
Authors: Jin Han Yu , Cheng Xiu Sheng , Song Xiu Feng
Published: June 2014

The working principle of wet clutch was analyzed and the mathematical model was established for torque deliver. Experimental verification and simulation analysis was carried out for the clutch model in the situation of constant pressure engaging process. An efficiency examination of wet clutch implemented on the test rig and provided theory evidence for pressure precisely control.
Design of a VCM Actuator Using Halbach Magnet Array for Active Vibration Isolation System
Authors: Kim Myeong Hyeon , Kim Hyun Chang , Hong Dong Pyo , Gweon Dae Gab
Published: June 2014

This paper proposes the concept development and design of a VCM actuator for Active Vibration Isolation System (AVIS). Active vibration isolating method was constructed passive isolator and active isolator. Spring was used for isolating passively and actuator like voice coil motor was used for active isolating. The proposed active vibration isolating system could isolate a six degree-of-freedom disturbance effectively. In case of AVIS, payload is variable according to the type of instruments. Therefore, actuator should maintain uniform performance with payload change. The proposed VCM actuator satisfied this performance through relative relation between magnet array and coils. In addition, for maximizing actuator performance, actuator should generate large force density. Therefore, we apply the Halbach magnet array to proposed actuator. The Halbach magnet array helps with reinforcing magnetic flux field. The reinforced magnetic field takes a role to generate more powerful Lorentz force to isolate disturbance. Finally, in this paper, we propose the actuator that novel type using voice coil motor with the Halbach magnet array and optimize each design variables to generate maximum output. These AVIS can use to eliminate disturbance in Maglev stage. Maglev stage need AVIS to increase its performance is necessary. In the future, AVIS and Maglev system will be integrated.
Design on Control System for Electro-Hydraulic Hitch Equipment of Tractor
Authors: Du Qiao Lian , Chen Xu Hui
Published: June 2014

The tractor hydraulic hitch system is an important subsystem of modern agricultural tractor work unit. Its main function is to hook and control agricultural machines working position. The hydraulic hitch system is an important part of modern agricultural tractor work unit. The research on the hydraulic hitch system control method, is the basis of ensuring that the tractor work unit reach the optimal performance .This paper analyzes the tractor hitch control function, introduces the principle of electro-hydraulic control of tractor ploughing depth, and the tractor mechanical hydraulic hitch equipment as the basis, using electric hydraulic control to replace the original mechanical hydraulic control, improved design of automatic control system. The novel electro-hydraulic hitch system having multiple parameter stability comprehensive regulation performance, can replace the traditional mechanical type regulating device, to achieve depth homogeneous, stable work.
A Dynamic Simulation Approach for Servo-Control System
Authors: You Zhang Ping
Published: June 2014

As servo-control system becomes more and more complicated, traditional simulation method can't meet the increasing demand for servo-control system, an dynamic simulation approach for servo-control system is introduced With Simulink software platform. Taking an mechanical hydraulic servo-control system as sample, the mathematical model for the system is established by standard procedures firstly. Then the simulation model of this servo-control system are constructed with block diagram module in Simulink. Finally, dynamic simulation test are performed to validate the effectiveness of the method with simple operation of the software. The simulation results shows that the dynamic simulation approach with Simulink is an effective and convenient way to research the dynamical characteristics for servo-control system.
Study on a Fuzzy Logic Control Strategy of Regenerative Brake for Vehicular Hybrid Power Source
Authors: Sun Tao , Sun Yu Kun , Wang Xiang
Published: June 2014

Due to the lack of cruising ability in HEV(Hybrid Electric Vehicle), along with concerns about environmental issues, a hybrid power source built from a battery and an ultracapacitor is used as vehicular power source and is charged during braking processes. Based on the rule of “the lower ultracapacitor voltage, the less battery charging; the higher ultracapacitor voltage, the more battery charging”, this paper adopts a fuzzy logic control strategy to supervise the braking energy. Simulation results obtained using MATLAB/SIMULINK indicate that this method can effectively manage the energy distribution during regenerative braking processes and extend driving distance. Furthermore, the present approach provides an improvement in fuel economy and reduces pollutant emissions.
Design and Implementation of the CNC Monitoring System Based on Internet of Things
Authors: Zheng Yi Lin , Lin Hu , Su Xian Li
Published: June 2014

Aiming at the shortcomings of the traditional CNC sensor network such as the difficult cable laying and long-distance communication signal attenuation, this paper designed the CNC monitoring system based on Internet of Things technology. The design reduced the power consumption of the wireless sensor nodes and the packet loss rate of the sink nodes through the hardware-software co-design. The Internet of Things protocol presented in this paper achieved the real-time communication between the CNC operating platform and the wireless sensor nodes. The experiment result shows that the CNC monitoring system based on Internet of Things technology can provide the temperature and vibration information for the CNC operating platform in time with the advantages of simple layout and reliable communication.
A Survey on Infrared Weak Small Target Detection Method
Authors: Li Zhong Min , Mei Li Fei , Song Mao
Published: June 2014

Infrared weak small target detection is one of the key technologies in the early infrared imaging guidance and wide-field view surveillance system. In the complex and low signal-to-noise ratio background, the target has only a few pixels. There is no shape and texture information to use. It brings great difficulties to the infrared weak small target detection. In this paper, we sum up the research status of infrared weak small target detection method, and analyze the key problems of infrared weak small targets detection.
Effects of Cont Rail Joint Type on Bus Rollover Crashworthiness
Authors: Hong Han Chi , Huang Hong Wu
Published: June 2014

Three finite element models of bus with difference types of cant rail joint were developed and the rollover crashworthiness of buses was simulated by LS_DYNA according to ECE R66. The calculation technique was validated by the tests of three separate specimens, which were extracted from the bus superstructure. The velocity of bus just before impact for rollover, were calculated using ADAMS software and then used as initial condition for the LS_DYNA analysis. No intrusion was found in the residual space of three bus models during rollover test simulation. The energy absorbing capacity and distortion configuration were investigated. The simulation results shown that the cont rail joint structure played an important part in energy absorbing during bus rollover accident, and would contribute to some design guidelines for bus rollover crashworthiness.
Design and Application of a Kind of Micro-Gripper with Pneumatic Control System
Authors: Zhang Zheng Tao , Li Hai Peng , Xu De
Published: June 2014

In this paper, a kind of micro-gripper is introduced using vacuum adsorption method. The gripper is used to grasp a mm size micro-part in a micro-assembly process. Because of the requirement of the adsorption force, the negative pressure control system is employed which can let the micro-gripper inhale and exhale freely. Accordingly, the adsorption force of the micro-gripper can be controlled accurately. The PLC controller is used to get the pressure information from the electronic proportional valve. The PID control law is employed to adjust the opening of the valve. In this way, the micro-gripper can easily clamping and release micro-part especially for some micro-parts with adsorption effect. Experiments show that the adsorption force on the micro-part is greater than 0.5N satisfying the requirement of the clamp to grasp the micro-part.
Control Method Research of Parallel Operation of Power System with Multiple Sources
Authors: Yu Jia Ling , Cao Long Han , Mu Hao , Li Jing Nan
Published: June 2014

The parallel connection of multiple power supplies generates output current only depended on the highest power voltage because of the unmatched precision of output voltage and imbalance output power. On account of lacking an appropriate way to solve that current problem presently, this paper presents a multiple power sources control method based on fuzzy control. According to the output voltage error and its change rate of each power source, this method modulates PWM by fuzzy control to keep each voltage conversion circuit share the same output voltage. So the output current of power multiple sources is equal to the sum of multiple power current, make the available power supply at the same time, solve the countercurrent and output current offered by the supreme power supply voltage, increase the energy utilization.
Control Strategy of Hybrid Electric Vehicles Based on Driving Style Identification
Authors: Tang Xian Zhi , Yang Shu Jun , Xia Huai Cheng
Published: June 2014

The driving style comprehensive identification method based on the entropy theory is presented. The error and error proportion of each identification result are calculated. The entropy and the variation degree of the identification error of each identification method are calculated based on the definition of information entropy. According to the entropy and the variation degree of the identification error, the weight of each kind of identification method can be determined in the comprehensive identification method, and the driving style comprehensive identification algorithm is derived. The control strategy of hybrid electric vehicles based on the driving style identification is proposed. The economic control strategy and dynamic control strategy are established. Depending on the results of driving style identification, aiming at different kinds of drivers, the mode of control strategies can be adjusted, so the demands of different kinds of drivers can be satisfied. The hybrid electric vehicle simulation model and control strategy model are built, and the simulations have been done. Due to the simulation results, the drivers’ intention comprehensive identification method based on the entropy theory is proved to represent the driver’s driving style systematically and comprehensively, and the hybrid electric vehicle control strategy based on the driving style identification can make the vehicles satisfy different drivers’ demands.
Finite Element Analysis of Coronary Sent with the Presence of Plaque and Vessel by Balloon Expansion
Authors: Yu Wen Yan , Wang Jian Guo , Qin Zhi Jian
Published: June 2014

Stent implantation is a non-surgical method to treat the coronary artery disease that can support vessel walls and reduce the risk of heart attack. In this paper, undertaking the 316L stainless steel as a medical stent material, a certain coronary stent is utilized to study its mechanical characteristics by the finite element analysis as it is deployed and implanted in a vessel containing a plaque, and try to reach to a model close to a real condition of stent implantation. The result shows that the width size of stent rods is greater than its thickness size in the capability of resisting deformation of configuration, and then displacement changes of the coronary stent on the axial direction should be keeping a close eye in their expansion process.
Fuzzy-Neural Network Control on Secondary Hydraulic Transmission System
Authors: Zang Fa Ye , Wang Yong , Kong Xiang Zhen
Published: June 2014

A secondary hydraulic transmission control method is presented based on the fuzzy-neural network control which introduces the fuzzy control into neural network. The simulation results show the self-adaptive ability and controlling performance of the secondary hydraulic transmission system is improved.
Study on Aerodynamic Layout of Two-Dimension Trajectory Correction Projectile
Authors: Zhang Jia Yi , Wang Xiao Yu , Hao Yong Ping , Guo Yu Yang
Published: June 2014

To research aerodynamic layout of the two-dimensional correct projectile, the model of projectile under different aerodynamic layout was established. Various kinds of aerodynamic dates were obtained through aerodynamic simulation. Through the establishment of suitable for two-dimensional modified ballistic model of the projectile, the capability of correcting has been received for the different layouts of the rudder. The simulation results show, to meet the aerodynamic layout of the two-dimensional correct projectile and flight stability, the rudder is closer to the head of the projectile, the correction ability is better.
Study on Control Strategy for Locking-Up Process of Torque Converter
Authors: Jin Yi , Liu Xi Xia , Liu Wei Ping
Published: June 2014

In this paper, whole vehicle model is established by Matlab/simulink. Locking-up process of torque converter is simulated based on whole vehicle model. The influence of slope K of oil pressure of lock-up clutch to the performance of vehicle is analyzed. Golden section method is proposed to calculate slope K of oil pressure of lock-up clutch in the Locking-up process. The simulation result shows: Locking-up quality of torque converter is effectively improved by slope K calculated by Golden section method.
Development of the Software for Ball Nut Grinding Process Based on Siemens 840D System
Authors: Shao Jing Feng , Li Jing , Shen Nan Yan , He Yong Yi
Published: June 2014

Based on the analysis of the grinding model and grinding process of ball nut, the grinding process software for ball nut is developed by using VB programming language and Access database technology. Afterwards, the software is integrated into the Siemens SINUMERIK 840D System. As a result, it realizes the database management of grinding parameters and the automatic generation of machining program, thereby simplifying the process of CNC operation and improving the production efficiency greatly.
Finite Element Analysis and Optimization for the Structure of NC Forming Machine
Authors: Liu Li Min , Shan Zhong De , Liu Feng
Published: June 2014

Numerical control (NC, for short) forming machine is kind of digital forming equipment, which is based on the development of manufacturing technology without pattern, and can get mold by processing module directly, and its mechanical structure is mainly composed of the main structure, moving system, tool system and other components. The main structure is not only the foundation and framework of the entire machine, but also the most important component bearing pressure. The moving system is the most critical part of forming machine to achieve its fundamental function. Therefore, the design and development of the main structure and moving system have directly impact on the performance and service life of the forming machine, which is an important factor to reflect the level of the overall design. In this paper, structural static analysis of the main structure and moving system was made through finite element numerical simulation, the more reasonable scheme was optimized, by which the safety and reliability of forming machine was ensured. The research results can provide the necessary technical support for the structural design of NC forming machine.
Thermal Error Compensation on Boring & Milling Machining Center Feed System Based on PMAC
Authors: Sun Jun , Liu Xing , Li Zhi Xuan
Published: June 2014

Aiming to deal with thermal error of NC machine tool which can cause reduce of machining accuracy, this paper uses an external error compensation which interacts with NC controllers and PMAC multi-axis and then revises the tool path by adding the error tested in real-time by PMAC card. The processing accuracy is improved eventually. This method can compensate machine geometric errors and thermal errors in real-time. Comparing with other methods of error preventing, this method is more effective and affordable.
Design and Development of Availability Information System for Heavy CNC Equipment Based on Cooperation of Network
Authors: Wei Ling Hui , Huang Jun , Xu Hong Hai
Published: June 2014

The availability Research of heavy CNC Equipment is based on the equipment life cycle process from design, manufacture, production and assembly to run, involves cooperation process and information exchange timely among availability research institute, equipment manufacturers and multi-class equipment users, combine network and database techniques, build high-level platforms for information exchange and management, broaden cooperation field and ensure accuracy for original information timely. Moreover, multi-class users can complete certain task together with the help of fault information collected, equipment improvement, information-sharing and issues discussed.
Design on the New Composite Rail of Beam in CNC Gantry Machine Tool
Authors: Lu Hua
Published: June 2014

The arrangement form of beams in CNC gantry machine usually arranged in the upper and lower two rails, But in heavy cutting,Large overturning moment will reduce the rigidity and precision of the machine. Therefore, on basis of analysis of the advantages and disadvantages of the conventional rail , a new composite rail structure is designed. Been put into use, sensitivity, rigidity, vibration force, load force and moment resisting capability of oriented machinery and deputy campaign on process equipment is greatly improved.
User Interface Design of 1090ES Mode Embedded Ground-Based Transceiver System
Authors: Zhang De Yin , Yu Xiao , Liu Zhi Yong
Published: June 2014

The novel user interface design of 1090ES Mode embedded ground-based transceiver (GBT) system is introduced in this paper. 1090ES mode is applied to the GBT system to receive airborne Automatic Dependent Surveillance-Broadcast (ADS-B) data. The output data of the GBT system are obtained through system’s serial port by processing information of ADS-B segment in 1090ES information structure. The novel user interface is based on Linux operating system and cross-complied on ARM platform to realize flight display function. The 1090ES mode data sent from aircraft is accurately recognized by ADS-B system software based on Linux, and precisely located in graphical interface either. The improved ADS-B system software in this user interface design occupies less resource, and can be easily transplanted to other embedded platform through cross-complied embedded Quasar Technologies (Qt) software. The complicated receiving and display of GBT system can be transformed into small size and portable device (4.6 inches) through this user interface design.