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作者： Zhou, Xuesong Li, Chao Ma, Youjie Li, Ji Yu, Yang School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin 300384 China

ISBN: (纸本)9787894631046

Regarding different operating conditions under different wind speed in Variable-Speed Constant-Frequency Wind Energy Generation using Doubly-Fed Induction Generator, the ADRC methods as applied to Grid-Connected, Maximal Power Point Tracking and Constant Power Output are presented. Finally, ADRC was prospected in the Variable-Speed Constant-Frequency Wind Energy Generation with Doubly-Fed Induction Generator.

关键词： Speed

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A Fast Generalized Predictive control Algorithm Based on Toeplitz Matrix

A Fast Generalized Predictive Control Algorithm Based on Toe...

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International Conference on Computational Intelligence and Software Engineering (CiSE)

作者： Zaiping Chen Lan Yu Enzeng Dong Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems School of Electrical Engineering Tianjin University of Technology Tianjin China Department of Automation Tianjin University of Technology Tianjin Hebei Anping Department of Automation Tianjin University of Technology Hebei Anping

In order to reduce the computational a novel approach is proposed in which the generalized predictive control (GPC) algorithm is improved based on toeplitz matrix in this paper. The control algorithm proposed is simplified by reconstructing the performance index. This approach has good adaptive ability and robustness with low-cost computation. The effectiveness and rapidity of this algorithm is demonstrated by the simulation results.

关键词： Prediction algorithms Predictive control Mathematical model Equations Simulation Predictive models Computational modeling

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Calibration Research on Fish-eye lens

Calibration Research on Fish-eye lens

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International Conference on Information and Automation (ICIA)

作者： Xiaofeng Wang Weijia Feng Qingjie Liu Baofeng Zhang Zuoliang Cao School of Mechanical Engineering Tianjin University of Technology Tianjin China State Key Laboratory of State Key Laboratory of Technology and Instruments Tianjin University TJU Tianjin China School of Computer Science and Engineering Beihang University Beijing China Tianjin Key Laboratory for Control Theory & Applications in Complicated Industry Systems Tianjin University of Technology Tianjin China

ISBN: (纸本)9781424457014

A novel calibration method for fisheye lens camera is proposed in this paper. The method is based on equidistance projection model of fisheye lens. The inner structure of the fisheye lens which consists of many pieces of lens is so complex that it is very difficult and unnecessary to construct its physical model. The optical center of the fisheye lens (u 0 ,v 0 ), the virtual focal of the fish-eye lens l and the ration of the distortion in x coordinate Kx and the Ky in y coordinate should be calibrate in the mathematical mode proposed by us. Some special calibration patterns have been designed for calibrating them. Here, the optical center is the precondition for other parameters precise calibration. Therefore, we discuss four different methods to get it. The experiment results show that the methods we present are accurate and stable.

关键词： Calibration Lenses Optical distortion Cameras Mathematical model Optical sensors Mechanical engineering Laboratories Robot vision systems Machine vision

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A Dual-Frequency Loading Device for Tissue Engineering Cartilage

A Dual-Frequency Loading Device for Tissue Engineering Carti...

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International Conference on Bioinformatics and Biomedical Engineering (ICBBE)

作者： Qiang Xu Chunqiu Zhang Yubo Fan Han Wu Shuqing Zhang School of Mechanical Engineering Tianjin Key Laboratory of Control Theory & Applications in Complicated Industry Systems Tianjin University of Technology Tianjin China Department of Bioengineering Beihang University Beijing China China-Japan Friendship Hospital Jilin University Changchun China

Cartilage degradation or defects cause joint pain, activity obstacles, or even completely losing the joint function. At present, using many new technologies and methods for treatment clinically, but it only relieves the patients of pain. The development of cartilage tissue engineering is becoming an ideal way of permanently repairing tissue defects. Mechanical factors play a major role during the cartilage growing and developping. Currently, a variety of mechanical conditions are applied to cartilage bioreactors, such as Fluid shear stress, Liquid Pressure, Direct compression etc., or some combinations of these. But these mechanical conditions have not reflected the real mechanical environment of the cartilage. According to the biomimic principle of tissue engineering, from the mechanical characteristic of human activities, we have developed a dual-frequency loading device using in cartilage culture, adopting dual-frequency loading *** are two frequencies and corresponding amplitudes working on the building cartilage at any time, and it achieves that low-frequency high-amplitude coupling high-frequency low-amplitude loads acting on artificial cartilage constructions, that is, under dual-frequency dynamic loading conditions. The kind of dual-frequency loading method maybe contribute to the construction of the cartilage. The structure size of the device is enough small to fit for working in the general culture box, and we will test it with biological experiment in future.

关键词： Tissue engineering Joints Pain Degradation Medical treatment Mechanical factors Bioreactors Stress Humans Frequency

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Study on dynamic object attitude based on a binocular stereo vision system with orthogonal optical axes

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2010年第11期21卷 1893-1897页

作者： Zhang, Xiao-Ling Zhang, Bao-Feng Lin, Yu-Chi Liu, Dong-Mei Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems School of Automation Tianjin University of Technology Tianjin 300384 China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University Tianjin 300072 China

The binocular vision measurement system is adopted to obtain the attitude of dynamic object. in which two CCDs are used and their optical axes are orthogonal. At first, the axis vector of the measured object is obtained using the orthogonal principle of two CCDs'optical axes. Then the attitude of the moving object such as pitch angle, yaw angle and rotation angle can be obtained by the relationship between the axis vector and the attitude of the measured object. The results of experiment and analysis show that the measurement method has higher precision, and can meet the measurement requirements for the dynamic parameter of the moving object in a long distance.

关键词： Stereo image processing

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Describing fuzzy sets using a new concept:fuzzify functor

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Optoelectronics Letters 2009年第1期5卷 69-72页

作者：魏克新王兆霞王权 Tianjin Key Laboratory of Control Theory & Applications in Complicated Systems Tianjin University of Technology Department of Electrical and Computer Engineering National University of Singapore

This paper proposed a fuzzify functor as an extension of the concept of fuzzy *** fuzzify functor and the first-order operated fuzzy set are *** the theory analysis,it can be observed that when the fuzzify functor acts on a simple crisp set,we get the first order fuzzy set or type-1 fuzzy *** operating the fuzzify functor on fuzzy sets,we get the higher order fuzzy sets or higher type fuzzy sets and their membership *** the fuzzify functor we can exactly describe the type-1 fuzz...

关键词： Membership functions

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DSP-based control of the new current hystersis PWM rectifier system

DSP-based control of the new current hystersis PWM rectifier...

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2009 International Workshop on Intelligent systems and applications, ISA 2009

作者： Wei, Kexin Li, Huaping Wang, Shuiming Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin China

ISBN: (纸本)9781424438945

In this paper, according to the control requirement and actual project conditions of three-phase high power factor rectifier, the research of low switching losses three-phase PWM rectifier adopts hysteresis current control strategy which bases on load current feed-forward control. The system not only improves the high-frequency switching problem, but also makes that the system has much lower dependence on the PI parameters of the outer-loop voltage regulator than conventional hysteresis current control PWM rectifiers. The system works well even under unbalance power conditions. Both simulated and experimental results confirm the validity of the new control strategy and lower dependence on the PI parameters of the outerloop voltage regulator.

关键词： Voltage regulators

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Design of fault diagnosis system of FPSO production process based on MSPCA

Design of fault diagnosis system of FPSO production process ...

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5th International Conference on Information Assurance and Security, IAS 2009

作者： Gao, Qiang Han, Miao Hu, Shu-Liang Dong, Hai-Jie Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin China

ISBN: (纸本)9780769537443

Based on the theory of wavelet analysis and principal component analysis, Multi-scale PCA is introduced which combines the ability of PCA to decorrelate the variables by extracting a linear relationship, with that of wavelet analysis to extract deterministic features and approximately decorrelate autocorrelated measurements to improve the performance of PCA whose modeling is limited to a single scale. It is applied to the fault monitor and diagnose of Floating Production Storage and Off-loading system. The result show: the fault diagnose method based on multi-scale principal components analysis can realized FPSO earlier period fault monitor and diagnose accurately, and the capability of multi-scale principal components analysis fault diagnosis is better than the principal components analysis for the small disturbance. © 2009 IEEE.

关键词： Failure analysis

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A robust control for TCSC based on a multiple model adaptive control strategy

A robust control for TCSC based on a multiple model adaptive...

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2009 International Conference on Information Engineering and Computer Science, ICIECS 2009

作者： Wang, Hong-Jun Zhao, Hui Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology TUT Tianjin China

ISBN: (纸本)9781424449941

Linear TCSC damping controller is bad in adaptability and robustness, but its control strategy is simple and easy to be implemented;on the contrary, the nonlinear TCSC damping controller has the better adaptability and robustness, but its control strategy is too complicated. A multiple model adaptive control strategy for robust damping of interarea oscillation in power system is put forward in this thesis. Based on the recursive Bayes theorem, the weight for each model is calculated and final output of the controller is synthesized by the weights. A more satisfied performance in adaptive and robust for the new model is proofed by the simulation result. ©2009 IEEE.

关键词： Robust control

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Research of 3-phase reversible rectifier based on current hysteresis regulator

Research of 3-phase reversible rectifier based on current hy...

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2nd International Workshop on Computer Science and Engineering, WCSE 2009

作者： Wei, Kexin Yang, Zishan Dong, Chao Tianjin Key Laboratory of Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin 300384 China

ISBN: (纸本)9780769538815

According to the control requirement and actual project condition of three-phase high power factor rectifier, for the sake of eliminating inconstant switching frequency in the converter that brought on rather serious power supply harmonic pollution and shock damage of power devices and reducing difficulty of filter circuit design, based on these problems the constant switching frequency control algorithm adopting current hysteresis regulator was put forward. It combines their respective advance of current hysteresis control and constant switching frequency strategy, enhanced the system's dynamic response and well robust character, and minimized its switching loss. In terms of simulation results analysis, and construction of an experimental prototype based on DSP TMS320F2812, both of them verified the validity and superiority of the proposed algorithm. © 2009 IEEE.

关键词： Electric rectifiers

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