Table of Content

10 December 2012, Volume 23 Issue 23

Previous Issue    Next Issue

Characteristic Analysis of Self-lubricantion Metal Bonded CBN Wheel during Dry Grinding

HE Wen-Guo-1, 2, XU Jiu-Hua-3, FU Yu-Can-3, CU Hou-Jun-2

2012, 23(23):  2773-2777. 

Asbtract ( )   PDF (726KB) ( )  

References | Related Articles | Metrics

The technique of self-lubricantion metal bonded CBN abrasive wheel was proposed for dry grinding titanium alloy, and therefore has been expected to reinforce the cutting ability. Metal bonded grinding wheel was prepared successfully. This paper also studied the cutting ablitiy of self-lubricantion metal bonded CBN wheel experimentally on the wheel wear, workpiece surface topography, metallurgical structure and micro hardness on dry grinding Ti6Al4V comparing with SiC wheel in detail. The results indicate that self-lubricantion metal bonded CBN wheel show excellent performance during dry grinding titanium alloy. A combination of wheel speed 15m/s, workpiece speed 2m/min, depth of cut 0.025mm accomplishes with the expected good machining results.

Study on a New Non-uniform and Intermittent Mechanism

SHU Gao-Gong-1, CHEN Zhi-Wei-1, XIE Bing-Liang-1, DIAO Jun-1, SHU Jian-Beng-2

2012, 23(23):  2778-2782,2787. 

Asbtract ( )   PDF (561KB) ( )  

References | Related Articles | Metrics

A new type of non-uniform and intermittent mechanism with non-circular gear and incomplete non-circular gear was designed on the basis of the analysis of recent advances. Working principles and structural feature of the mechanism were introduced, and the kinematics model was established. The software of computer-aided analysis for this non-uniform and intermittent mechanism was developed. By human-computer conversation, structural parameters were obtained, which can meet the demands of driving. Based on these parameters, 3D model and simulation analysis of this non-uniform and intermittent mechanism were completed. This mechanism was used successfully in plug seedling pick-up mechanism, thus the feasibility of the theoretical model was verified.

A Force/Position Control and Experimental Research for a Vertical CNC Plane Lapping Machine

YAN Wen, HUANG Yu-Mei, GAO Feng

2012, 23(23):  2783-2787. 

Asbtract ( )   PDF (503KB) ( )  

References | Related Articles | Metrics

A control scheme was put forward for vertical CNC plane lapping machine based on torque limit and dimensioned mechanism, aiming at some technology characteristics and practical requirements of plane lapping. Through the theoretical analysis and experiments, the pressure was equivalent to torque, and the functional relationship between output torque of Z axis motor and lapping pressure was set up. A method of controlling the lapping pressure was achieved by controlling the motor output torque in speed mode. In addition, the torque limit was an effective way to avoid phenomenon known as surface burns. A dimensioned mechanism was designed by which a position detection of terminal load in outer loop was achieved. The mechanism makes the size control of workpiece directly, the errors of intermediate links can be ignored. The results show that, using the force/position control scheme, lapping effect is satisfactory, stabilization of pressure control and positioning accuracy meet the technological requirements. Compared with traditional methods, the lapping vertical machine tool using the proposed control scheme can get rid of complicated hydraulic or pneumatic actuator, which simplifies machine structure and reduce production costs. Simultaneously, manual measurement in the case of shutdown is avoided, which both reduces the cycle time and reject rate.

Research on Driving Characteristics of an Oscillating Piezoelectric Actuator

FAN Wei, LI Zhong-Shen, CUI Chang-Cai

2012, 23(23):  2788-2792. 

Asbtract ( )   PDF (635KB) ( )  

References | Related Articles | Metrics

A driving test system of oscillating piezoelectric actuator was constructed by using PCI-7484 data acquisition card, grating and acceleration sensor. By analyzing the driving features of the system experimentally, the additional vibration rules of oscillating piezoelectric actuator in AC drive mode and the nanoscale drive characteristic curves in DC drive mode were obtained, which provides the scientific method and reference to further improve the driving system control precision of the oscillating piezoelectric actuator.

Digital Robust Sliding Mode Control of Robot Manipulator with Dynamic Friction Block Compensation Using Fuzzy RBF Neural Network

LI Min, WANG Jia-Xu, XIAO Ke, HUANG Chao, XU Chao

2012, 23(23):  2792-2796. 

Asbtract ( )   PDF (622KB) ( )  

References | Related Articles | Metrics

Combining with nonlinear,strong coupling dynamics model of  a robot manipulator,this paper presented a digital robust sliding mode robot control
algorithm,which compensated for the uncertainties of robot manipulator-LuGre
dynamic friction with three fuzzy RBF neural network,and trained parameters of nonlinear dynamic friction on-line and adaptively.Then this paper analyzed the Lyapunov stability
of the algorithm.The simulation of a two degrees of freedom robot manipulator proves
that the algorithm is of high accuracy,high reliability,high quality,
stable and strong robustness.Meanwhile,nonlinear kinetic phenomena,such as rhombus
attractor,lie in the kinetic properties of the friction model of the robot manipulator. 

AP1000 Nuclear Power Plant Containment Cylinder Measurement

ZHOU Cheng, HONG Jin-Hua

2012, 23(23):  2797-2801. 

Asbtract ( )   PDF (540KB) ( )  

References | Related Articles | Metrics

Aiming to measure AP1000 nuclear containment cylinder, based on the actual production situation and assembly precision of the containment cylinder, the authors created a containment cylinder docking model, and studied the cylinder radius and the verticality measurement methods. A set of measurement methods for AP1000 nuclear containment cylinder were made eventually, which brings a reference for other measurements of nuclear power plants. 

Design of Transmission Scheme for 8-speed AT Based on Lever Method

YOU Meng-Fu-1, LI Zhi-Wei-2, GAN Wei-2, GAO Ai-Feng-2

2012, 23(23):  2801-2804. 

Asbtract ( )   PDF (456KB) ( )  

References | Related Articles | Metrics

A new transmission scheme based on original lever method was expanded. The transmission and transmission scheme of ZF6 AT were analyzed detailedly by using the explanded lever method. The results prove the correctness of the explanded lever method, and a transmission scheme of 8-speed AT was designed and researched as well.

A Novel Method of Planning Path for DDWMR

SHI En-Xiu-1, HUANG Yu-Mei-1, SHU Cong-Min-2, ZHANG E-Xu-1

2012, 23(23):  2805-2809. 

Asbtract ( )   PDF (549KB) ( )  

References | Related Articles | Metrics

According to the motion characteristics of WMR and the characteristics of Hermite polynomial  which has the continuous curvature,a novel method
of path planning for DDWMR was proposed based on Hermite interpolation.The method was used to plan path in order to control DDWMR moving smoothly to the target with accurate pose(position and attitude).It is proved that WMR can arrive on the target with accurate pose and the driving wheels changes smoothly and continuously through by the simulation.After that,the experiments  were done on XAUT.AGV100 made by authors.It is verified that the designed method insures DDWMR to arrive at the target with the pose required and track the planned path stably through by experiments.It is indicated that the proposed path planning method is effective when it is used to plan path for DDWMR.It can control WMR to move smoothly along the path planed,and arrive at the target with an accurate pose. 

Semantic-based Model of New Product Design Service Task Management

GUO Gang, LI Guang-Dui, SHANG Hua-Mao, DONG Yuan-Fa

2012, 23(23):  2810-2816. 

Asbtract ( )   PDF (832KB) ( )  

References | Related Articles | Metrics

To deal with the common needs of new product development network design services, a design service pattern of combination of online and offline resources,a network design service public platform system architecture and a management model of design services task types, characteristics and attributes were proposed herein.Then formal definitions and description of the design service tasks were carried out by using OWL language, and a semantic-based design service task management model was built. Correctness and feasibility were validated by an application instance on network design service public platform.

Research on Knowledge Sharing for Customer Collaborative Product Innovation Based on Knowledge Grid

GENG Jing-Song-1, 2, YANG Yo-1, LIU Ai-Jun-1, TAO Hao-3

2012, 23(23):  2817-2824. 

Asbtract ( )   PDF (765KB) ( )  

References | Related Articles | Metrics

The features of customer collaborative product innovation knowledge sharing on knowledge grid were analyzed, a knowledge sharing model was put forward and its correlated key points were deeply researched. An “innovation-problem-function” model was presented to realize the non-structure creativity transformation; then an ontology concept of product innovation knowledge sharing and its top-bellow relation was established and defined.And the ontology concept was divided according to concept type, rule type and instances type, on the basis of this the means of product innovation knowledge ontology semantic based on OWL were propounded. Finally, the access mechanism and prototype system of knowledge sharing was constructed, and the feasibility and validity were testified by the product innovation design of an electric drill.

Simulation and Dynamic Analysis of Outer Ring Fault on Rolling Bearings Using Explicit Finite Element Method

LI Guo-Chao-1, BANG Wei-2, LI Yong-Cai-3, GAO Li-Xin-1, ZHANG Jian-4

2012, 23(23):  2825-2829. 

Asbtract ( )   PDF (738KB) ( )  

References | Related Articles | Metrics

In order to study the operation and the vibration characteristics of rolling bearings with an early and weak fault, using software ANSYS/LS-DYNA a finite element model of the rolling bearing with an outer ring fault was built. The model was based on an explicit algorithm, the element used single point integral algorithm and the model fully considered the rotational speed, radial force, contact and friction. It was simulated successfully the operation of the fault rolling bearing. From the simulation results, the effective stress value of the fault outer ring is much higher than the value of the inner ring, the cage and the rolling elements which have no fault. By the analysis of the nodes on the raceway of the outer ring, the displacement responses of the nodes can reflect the fault characteristic frequency, while the amplitudes of the vibration responses are slightly different. After FFT analysis, the velocity responses and the acceleration responses can partly find the fault characteristic frequency. These provide a method for researching failure mechanism and detecting the faults of rolling bearing. 

Research and Simulation of a New Hydraulic Drive Technology for Engineering Mechanical Arm

LIU Zhong-1, 2, LIU Deng-2, JIN Yao-2, SHU Gao-3

2012, 23(23):  2830-2835. 

Asbtract ( )   PDF (672KB) ( )  

References | Related Articles | Metrics

A new electro-hydraulic position control system, which used the high speed on/off valve as the pilot valve for the cone valve, was designed in accordance with the features of high power engineering mechanical arm. A model of the hydraulic system was established by the AMESim software. Then the simulations were conducted with PID control and the PWM strategy based on five-point switch thought. The results show that the new system has stronger self-adaptability, track position with high precision, realizes the digital control with large flow which can arrive at 215L/min, and meets the drive needs of engineering mechanical arm.

Research on Change-point Estimation of Control Charts Based on Fuzzy Clustering Approach

CHEN Wei-Lei, DIAO Han, ZHOU Rong

2012, 23(23):  2835-2838. 

Asbtract ( )   PDF (448KB) ( )  

References | Related Articles | Metrics

Traditional control charts did not indicate the real time of the process changes which were change-point. A fuzzy-statistical clustering approach was given to estimate the time of changes based on the fuzzy cluster and statistical theory. The proposed approach has a good result of change -point compared with traditional Shewhart control chart method and FCM method to estimate the change-point of different control charting methods with or without variable sampling strategies in a good deal of simulation. Finally, the method was used in the engine cylinder manufacturing process. The effectiveness and feasibility of this study were tested.

SPM System Based on a New-stylus Fabricated by PVDF Membrane

WEI Jin-Feng, HUANG Jiang-Xian, ZHANG Cuo-Feng, CHENG Xiu-Li

2012, 23(23):  2839-2843. 

Asbtract ( )   PDF (655KB) ( )  

References | Related Articles | Metrics

Using PVDF piezoelectric film and PZT-actuators, combined with a tungsten probe derived from electrochemical grinding, a new scanning stylus with a symmetrical structure of tapping mode was developed. In the stylus, PVDF piezoelectric film as a vibrating beam and the tungsten probe fixed below the middle of the beam were in the state of resonance driven by the PZT. At the same time, PVDF film as a micro-force sensor to probe the atomic force between the top of probe and the surface of sample. A new SPM system was constituted from the constructed probe combined with three-dimensional locator and control procedures etc. This paper described such contents as the composition, working principle, characteristics of the stylus, in addition, the overall structure, measuring principle, three-dimensional positioning table control, signal processing and properties of the whole system test of the SPM system were also described, and three-dimensional image scanning was completed by taking a standard one-dimensional raster as the specimen, and the feasibility and effectiveness of the new SPM system were proved.

Study on a New Type of Differential with Variable Ratio for Off-road Vehicles

GU Ju-Min, GAO Bei, SUO Wen-Chi, SUN Ai-Li

2012, 23(23):  2844-2847. 

Asbtract ( )   PDF (505KB) ( )  

References | Related Articles | Metrics

A new type of differential with variable ratio for off-road vehicles was put forward, in which the transmission ratio varied at a circle of the planetary gear, which had half the number of the teeth of the half-axle gear. The variable range of ratio can go extreme as much as ±40%, resulting in locking coefficients of 2.33(theoretical) and 3.15(practical), which would be of great help to improve the passing capability of the vehicle. Based on the round trip mapping algorithm with preserved geodesic curvature between a sphere and a plane, the design methods of the pitch curves as well as the tooth profiles were presented, and an actual case study was illustrated to show the effectiveness of the new differential. 

Application of Time Calibration Signals in Noise and Vibration Measurement at Hypoid Gearing

XU Ai-Jun-1, 2, DENG Xiao-Zhong-2, ZHANG Jing-2, XU Kai-2, LI Ju-Bei-2

2012, 23(23):  2847-2851. 

Asbtract ( )   PDF (627KB) ( )  

References | Related Articles | Metrics

Based on gear noise and vibration measurement, an approach was proposed for the data collected with time calibration signals generated by a rotary encoder for circumferential index. Through the analysis of the harmonic features at gearing mesh, a measuring model of gear noise and vibration with time synchronous calibration signals was established. With the frequency characteristics of time calibration to be derived, the filtering effect was analyzed. Then, the simulation and analysis of the gear meshing frequency and its harmonics were implemented by the filter in Matlab software. Finally, the noise and vibration measurement experiments of hypoid gears were verified on the platform installed on the Y9550-type rolling tester. Experiments indicate that the measurement method using time calibration signals can effectively isolate the vibration of machine itself and reduce the unknown noise disturbance. Through the results, the relevant frequency information associated with gear mating cycle can be extracted accurately.

#br# Design and Reuse of Curves on Manifold Triangulation Based on Discrete Exponential Maps

HAN Lin, LIU Bin

2012, 23(23):  2852-2857,2863. 

Asbtract ( )   PDF (717KB) ( )  

References | Related Articles | Metrics

By introducing exponential mapping parameterization into curve design on the surface, a reuse approach of geodesic B-spline curve on mesh surface was proposed. The exponential map had the property of local differentiable homeomorphism, which can guarantee the effectiveness of mesh parameterization. As for the generated geodesic B-spline curve, its control points were parameterized using discrete exponential maps and its normal coordinates will be obtained, then under the prerequisite conditions that those normal coordinates remained unchanged, the geodesic B-spline curve could be moved, rotated and scaled by changing parameterized region. The generation of geodesic B-spline curve and the parameterization of local mesh did not depend on the scale of overall mesh vertices,so it had wide adaptability. The results show that, the method is robust, effective, and able to meet the requirements of curve interaction design on surface.

Dynamics Analysis and Control of a New Eight-wheel-legged Mobile Robot

WANG Gong-Mei-1, 2, ZHANG Meng-Lu-1, ZHANG Xiao-Dun-1, MENG An-Zhu-1

2012, 23(23):  2858-2863. 

Asbtract ( )   PDF (603KB) ( )  

References | Related Articles | Metrics

A new type of eight-wheel-legged mobile robot was designed to meet the needs of the emergency rescue system for mobile robots, which should have the ability of fast speed and terrain requirements. In the structure, this robot could change the angle among the legs to achieve attitude adjustment, and could raise wheels and legs to complete jump over, which could improve the ability of terrain through. In the control, Rolls equation was used to obtain the dynamic model of the robot. Sliding mode control was used for robot trajectory tracking. To reduce the steady-state error, switching function adopted integral type. In order to avoid chatter phenomenon, switching gain could be self-adjustment by integral form. From the simulation results, the tracking error of the robot can approach zero with fast velocity and small overshoot.

Tolerance Design of Complex Quality Characteristics

BO Guo-Li-1, 2, SU Qin-2

2012, 23(23):  2864-2868. 

Asbtract ( )   PDF (484KB) ( )  

References | Related Articles | Metrics

On the basis of traditional way of “design- experiment-model-optimization”, CCD was employed to consider multi quality characteristics simultaneously at stage of experiment. Trust region and simulation approaches were used to design tolerance and overcome the computation complexity at stage of optimization. An example was discussed to verify the effectiveness of proposed method.

Research on Non-circular CNC Turning Technology Based on High Response Linear Motor

LI Cheng, AI Wu, DUAN Chun, CHEN Guo-Pei, XIAO Yi

2012, 23(23):  2869-2874. 

Asbtract ( )   PDF (711KB) ( )  

References | Related Articles | Metrics

A kind of fast tool feeding mechanism through linear drive was proposed and the overall design of non-circular turning system was accomplished,which focused on the formation of soft mould of non-circular cross-section parts.A new kind of modeling method of non-elliptic was proposed.Taking the machining of convex oval piston for example,a real convex oval piston model with the maximum ovality of 6mm and the maximum error of 15μm,is processed through fast tool feeding mechanism.The experimental results show that the design completes the taskes of non-circular turning successfully.

Dynamics and Statics Analysis of Column-Spindle System Considering Guide Joint Characteristics

SUN Wei-1, LU Meng-2, HONG Bo-1, WEN Bang-Chun-1

2012, 23(23):  2874-2878. 

Asbtract ( )   PDF (556KB) ( )  

References | Related Articles | Metrics

The NSK LH35-type linear rolling guide was taken as study object, the finite element modeling methods of guide joint were described in detail by virtual materials and spring-damper units. Statics and modal analysis of linear guide system were done using the above guide models and the rationality of finite element modeling was verified by experimental modal test. Moreover, introducing the guide system model to the column-spindle system of a vertical machining center, statics and modal analysis of the whole system were calculated. The results were compared with that which was solved without considering the effect of guide joint and the large difference between the two results was found. Comparative analysis of the results shows the guide joint has an important impact on the dynamic performance of the whole machine, the mechanical properties of guide system must be considered when the whole machine is modeled and analyzed.

Decoupling Study of a Powertrain Mounting System with Effect of a Compliant Base

HU Jin-Fang, CHEN Mo-Wei, XIE Xian-Jun

2012, 23(23):  2879-2885. 

Asbtract ( )   PDF (811KB) ( )  

References | Related Articles | Metrics

In order to achieve the TRA decoupling of a powertrain mounting system in the full vehicle model,a coupling model with a compliant base(flexible chassis,suspensions,wheels) and powertrain mounting system was established analytically.
The accuracy of the model was verified by comparing the natural frequencies of the compliant base with the finite element method.The effects of compliant base on the coupled motions of a powertrain mounting system were analysed.A method of the TRA decoupling
for the powertrain mounting system in the full vehicle model was proposed based on the modes' properties and decoupling index of the coupled system.The simulation and experimental results indicate that:the TRA of  a powertrain mounting system in the full vehicle model is indeed decoupled and the vehicle comfort is improved when the proposed method is satisfied.

Research on Cipher Anti-theft System of Automotive

ZHANG Juan-Hua-1, 2, SHU Yin-Fa-1, SHANG Jun-Lang-2

2012, 23(23):  2885-2887. 

Asbtract ( )   PDF (471KB) ( )  

References | Related Articles | Metrics

By using a self-designed one-way coil solenoid valve in the engine intake pipe,and using SCM a password security system of a car was developed with the keyboard and type. Through installing digital keyboard multi-function steering wheel,the car open password was inputted and judged to be correct or not then to control opening and closing of the engine gas path, so as to achieve the vehicle anti-theft feature. Simulating the security system with the developed SCM slabs, the experimental results show that the password security system is safe and reliable,inexpensive, easy to conceal, and can effectively reduce the rate of car theft.

Lightweight Design and Optimization of Bumper Beam Based on Automotive Crash Safety

CAO Li-Bei, CHEN Jie, OU Yang-Zhi-Gao, LIU Kuo

2012, 23(23):  2888-2893. 

Asbtract ( )   PDF (558KB) ( )  

References | Related Articles | Metrics

The requirements of lightweight design of bumper beam with consideration of crashworthiness and pedestrian protection were introduced. An aluminum alloy bumper beam for a production car was designed according to these requirements. With minimizing the mass of beam as the objective, thickness optimization was conducted through central composite design method and adaptive response surface method. Compared with the original beam, the weight of the aluminum beam is reduced significantly and the performance of crashworthiness and pedestrian protection is enhanced effectively.

Study on Clamping Force of Metal V-belt Type CVT Based on Slip Control

CAO Cheng-Long-1, ZHOU Yun-Shan-1, GAO Shuai-2, AN Ying-2

2012, 23(23):  2893-2897. 

Asbtract ( )   PDF (597KB) ( )  

References | Related Articles | Metrics

Compared to mechanical transmission, the efficiency of the metal V-belt type CVT is lower. Using clamping force based on slip control which reduced the clamping force,and no big slip happen was ensured in any conditions,also improved the efficiency of power transfer and reduced the fuel consumption of a vehicle.The tansmission mechanism of metal V-belt type CVT was represented, then CVT slip dynamic mathematic model was established, and put forward slip control strategy.The slip rate clamping force control strategy was proved on the bench and in vehicle, the results show that the slip control can improve the transmission efficiency of 8%~10%, on ECE+EUDC working circulation fuel consumption reduces 5.2%. 