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IEEE International Conference on Mechatronics and Automation

作者： Hongbiao Xiang Shoujun Wang Chunqiu Zhang Xingfei Li Jun Liu Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology Tianjin CN Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University Tianjin Tianjin CN

Nonlinear friction and elastic deformation seriously affect both static and dynamic performance of mechanical serve system, especially in the high-speed and high-precision systems. This paper focuses on modeling, identification, and compensation of non-linear friction and elastic deformation for ball screw drive system. Firstly, the parameters of the stribeck model are identified by the method of extended kalman filter. And then the parameters of stiffness model of the ball screw are identified by the method of the least square based on force analysis of system. Finally, the feed-forward compensation of friction and elastic deformation is performed. The experimental results show that: after the compensation, the steady state error of low-speed motion decreases from 42μm to ±3μm, and that of high-speed motion decreases from 95μm to ±5μm. Therefore, the method proposed can effectively compensate the disturbance of friction and elastic deformation, and improve the tracking accuracy of the ball screw drive system.

关键词： Friction Fasteners Mathematical model Servomotors Deformable models Tracking Force

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Design of dual-frequency bioreactor control system

Design of dual-frequency bioreactor control system

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IEEE International Conference on Mechatronics and Automation

According to tissue engineering and basic principle of bionic, the low-frequency high-amplitude loading on articular cartilage is to simulate human walking or other activities, and the high-frequency low-amplitude loading is to maintain the cartilage framework structure from muscles, ligaments and other tissue. In order to build appropriate mechanical environment for cartilage tissue engineering, this paper design a dual-frequency bioreactor, and the control precision and performance is improved by a method of friction compensation. The control system is full closed loop composed of liner motor and grating scale, based on PC+PMAC opened control platform. Firstly, a dynamic equation of an open servo system is given and the friction characteristics are described based on Stribeck model. Secondly, Considering the parameters of friction model changed with the system, the controller of adaptive sliding friction compensation is designed by backstepping method, and the corresponding adaptive laws and switching functions are given. Besides, this method give analysis of its global asymptotic stability, proved by Lyapunov theorem. Finally, the adaptive sliding friction compensation control strategy is realized by Programmable Multi-Axis controller (PMAC), and the effectiveness of the method is verified by experiments. Results show that the steady state error of sinusoidal motion is decreased from the ± 22μm to ± 4μm compared with the velocity and acceleration forward feed-compensation. The dual-frequency bioreactor can simulate the mechanical environment of artificial cartilage tissue engineering on micrometer level, furthermore, it laid a foundation for the research of mechanobiology of cartilage.

关键词： Friction Mathematical model Tissue engineering Loading Adaptation models Servomotors

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Study on Tool Path Optimization in Multi-axis NC Machining

Study on Tool Path Optimization in Multi-axis NC Machining

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2015年第二届机电一体化与机械工程国际学术会议

作者： Xinghua Niu Tianding Wang Bofei Shen Tiemin Zhao Qianyou Huang Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology

This paper presents a new generation algorithm for tool path based on the optimization of traditional ***,the tool path on an impeller is generated with UG software,and it is used to make contrasts and verifications for the effect of ***,VERICUT software with the function of the simulating on the whole manufacturing process is utilized to verify the feasibility of the optimized algorithm.

关键词： NC machining path optimization UG VERICUT

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Path planning for mobile robot using the novel repulsive force algorithm

Path planning for mobile robot using the novel repulsive for...

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2015 5th International Conference on Computer Sciences and Automation Engineering(ICCSAE 2015)

作者： Yunwei Jia Guoqiang Yin Lianyu Zhao Xueping Li Siyue Sun School of Mechanical Engineering Tianjin University of Technology Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System

A new type of repulsive force algorithm is proposed to solve the problem of local minimum and the target unreachable of the classic artificial potential field method in this paper. The Gaussian function that is related to the distance between the robot and the target is added to the traditional repulsive force, solving the problem of the goal unreachable with the obstacle nearby;variable coefficient is added to the repulsive force component to resize the repulsive force, which can solve the local minimum problem when the robot, the obstacle and the target point are in the same line. The effectiveness of the algorithm is verified by simulation experiments based on MATLAB.

关键词： Artificial potential field localminimum goal unreachable mobile robot

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An Electrostatic Repulsive-Force Based Micro Actuator for Capacitive RF MEMS Switch

An Electrostatic Repulsive-Force Based Micro Actuator for Ca...

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IEEE International Conference on Nanotechnology

作者： Gang Li Xingjun Guo Qinghua Zhao Jie Hu Pengwei Li Wendong Zhang Chaoqun Cheng College of information engineering Taiyuan University of Technology Taiyuan China Key Lab of Advanced Transducers and Intelligent Control System (Ministry of Education) Taiyuan University of Technology Taiyuan China

ISBN: (纸本)9781467381574

A novel electrostatic repulsive force based micro actuator was firstly proposed to drive the capacitive radio frequency (RF) micro-electromechanical (MEMS) switch. The charging effects, which normally take place in the traditional electrostatic attractive force based MEMS switches, can be theoretically mitigated by using the proposed micro actuator, where no electric field will be produced across the dielectric when the proposed structure is actuated by the electrostatic repulsive force. The analytical models related to dielectric charging respectively derived from the electrostatic repulsive force and the electrostatic attractive force were analyzed and compared. In order to optimize the proposed micro actuator for further switch design, the formation mechanism and the operating principle of the electrostatic repulsive force was firstly analyzed, and then the relationships between displacement of movable electrode and the applied voltage were investigated by using the COMSOL Multiphysics software with the different micro actuator structures. The simulation results show that the maximum displacements of three new structures are bigger than the basic structure.

关键词： MEMS switch Charge accumulation Electrostatic repulsive force COMSOL

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Corrigendum to “Surface stress-based biosensors” [Biosens. Bioelectron. 51 (2014) 124–135]

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Biosensors and Bioelectronics 2015年 73卷 265-266页

作者： Shengbo Sang Yuan Zhao Wendong Zhang Pengwei Li Jie Hu Gang Li MicroNano System Research Center Taiyuan University of Technology Taiyuan Shanxi 030024 People's Republic of China Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education Taiyuan University of Technology Taiyuan Shanxi 030024 People's Republic of China

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Association rules mining algorithm using sharing mechanism niche leaping ant colony based on apriori algorithm

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Journal of Computational and Theoretical Nanoscience 2015年第10期12卷 3223-3231页

作者： Wang, Yang Xu, Yakun Li, Gang Wang, Hongliang MicroNano System Research Center College of Information Engineering Taiyuan University of Technology Taiyuan Shanxi China Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education Taiyuan University of Technology Taiyuan Shanxi China Ministry of Education North University of China Taiyuan China

Based on the alarm data in the information communication network under the context of big data, the paper discusses the classic association mining algorithms of Apriori and FP-Growth with living examples, elaborates the ant colony algorithm and the niche technology, combines the Apriori algorithm thought and the Travelling Salesman Problem (TSP) of the ant colony algorithm, and proposes association rules mining algorithm using Sharing mechanism Niche Leaping Ant Colony based on Apriori algorithm (SN-APLAC algorithm). The algorithm achieves the thought of "leaping ants" by accelerating support calculation through a sparse linked list and setting the route point of non frequent item sets as "stimulation point" and retains the local optimal solution to further improve the quality of association rules mining utilizing the technique of sharing mechanism niche. Copyright © 2015 American Scientific Publishers.

关键词： Association rules

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The Validity Analysis of Regression: Combining Uniform Experiment Design with Nonlinear Regression

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Applied Mathematics 2015年第6期6卷 996-1008页

作者： Nan Yang Dawei Zhang Yanling Tian School of Mechanical Engineering Tianjin University Tianjin China Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System School of Mechanical Engineering Tianjin University of Technology Tianjin China

The data topology structure of uniform experiment design (UD) is too complex to be reasonable regressed. In this paper, the principle and method of distinguish the training data and testing data were described to make a reasonable regression when uniform experiment design combined with support vector regression (SVR). Two equivalent ways which were the smallest enclosing hypersphere perceptron (SEH) and the enclosing simplex perceptron (ES) were provided to discover the topology relationship of the process parameter datum. To give an application, a series of experiments about laser cladding layer quality were conducted by UD to get the relationship of load, velocity and wearing capacity. Results showed that only the testing datum recommended by the two perceptrons got a good forecasting by SVR. Therefore, the two perceptrons could guide experiments with process parameter data of complex topology structure. Further, the application could be extended over a much wider field of experiments.

关键词： the enclosing simplex support vector machine uniform experiment design the smallest enclosing hyper sphere

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Tooth Surface Design for Variable Transmission Ratio Bevel Gearing

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Applied Mathematics 2015年第10期6卷 1685-1695页

A novel CAD method for tooth profile based on the gearing feature has been proposed in this paper, and this method could be applied to the variable transmission ratio and three-dimension situation. The two pitch curves of the two gears can be generated due to the given transmission ratio. The tooth profile curves are formed in each coordinate system of its pitch curve by the gearing process. Finally, the tooth profile could be extracted and translated into a real dimension by CAD method. It is provided a simply thought for tooth profile design to avoid so much complicated mathematical reasoning.

关键词： Computer-Aided Design Computational Geometry Gear Design Gear Geometry

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Effects of the pectus excavatum on the spine in patients of pectus excavatum with scoliosis

Effects of the pectus excavatum on the spine in patients of ...

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第十一届全国生物力学学术会议暨第十三届全国生物流变学学术会议

作者： Weihong Zhong Jinduo Ye Jifu Liu Chunqiu Zhang Linwei Lü Chunyue Zhang Bolun Liu Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Military General Hospital of Beijing PLA

Objective:Pectus excavatum(PE)is the most frequently observed congenital deformity of the chest with a deep depression of the sternum in the anterior thoracic *** more than 20%of pectus excavatum patients were reported to have *** to now,no comprehensive analysis about the impact that pectus excavatum has on scoliosis has been performed,although previous research has involved correlation among scoli-

关键词： Effects of the pectus excavatum on the spine in patients of pectus excavatum with scoliosis

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