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Analysis for Transverse Sensitivity of the Microaccelerometer

Engineering（科研） 2009年第3期1卷 196-200页

作者： Yu LIU Guochao WANG Changwen GUO Automobile College Chongqing University of Technology Key Laboratory of Automobile Parts & Test Technique in Chongqing Chongqing Engineering Research Center for Automobile Power System and Control

For the microaccelerometer, strong axial response and weak cross-axial one are always expected. This paper presents a general analysis about transverse sensitivity of the microaccelerometer. The analysis model is developed, where the influence of response stiffness and damping in different axes, as well as symmetrical decline angles of 3 degrees of freedom system is considered. Moreover, multi-freedom vibration equations based on the analysis model are established. And the equations are solved on condition that damping force is ignored. Finally, the theoretical analysis about transverse sensitivity is accomplished, and some effective methods, which are beneficial to reduce cross disturbance, are provided.

关键词： MEMS Accelerometers Transverse Sensitivity Multi-Freedom Vibration Equation

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Study of PID control System for Ant Colony Algorithm

Study of PID Control System for Ant Colony Algorithm

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GCIS, WRI Global Congress on Intelligent Systems

作者： Hong He Fang Liu Li Li Jin-Rong Yang Lei Su Yi Wu Tianjin Key Laboratory for Control Theory and Application in Complicated Systems Tianjin University of Technology and Education Tianjin China Tianjin Power Grid Company Power Test and Research Institute Tianjin China

The key of PID control systematic optimization design is PID parameter optimization. Traditional PID controller parameter adopt experiment to add the way of trying to carry out optimization by man. It is fairly time-consuming, PID controller have no self-adaptive ability, can only rely on artificial optimization parameter. This paper puts forward a kind of algorithm to select the PID parameters based on the crowd algorithm of ant. Scientists have put forward the crowd algorithm of ant by imitating the ant collective in nature and. Imitation research has shown the validity of this algorithm. this algorithm have surmounted the disadvantages of traditional PID regulator parameter optimization.

关键词： Three-term control control systems Ant colony optimization Design optimization Cities and towns Algorithm design and analysis Regulators Robustness Intelligent systems Laboratories

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Subspace Semi-supervised Fisher Discriminant Analysis

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自动化学报 2009年第12期35卷 1513-1519页

作者： YANG Wu-Yi LIANG Wei XIN Le ZHANG Shu-Wu Hi-tech Innovation Center Institute of Automation Chinese Academy of Sciences Beijing 100190 P.R. China Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Minister of Education Xiamen University Xiamen 361005 P. R. China College of Oceanography and Environmental Science Xiamen University Xiamen 361005 P. R. China School of Electronics Information and Control Engineering Beijing University of Technology Beijing 100124 P. R. China

Fisher discriminant analysis (FDA) is a popular method for supervised dimensionality reduction. FDA seeks for an embedding transformation such that the ratio of the between-class scatter to the within-class scatter is maximized. Labeled data, however, often consume much time and are expensive to obtain, as they require the efforts of human annotators. In order to cope with the problem of effectively combining unlabeled data with labeled data to find the embedding transformation, we propose a novel method, called subspace semi-supervised Fisher discriminant analysis (SSFDA), for semi-supervised dimensionality reduction. SSFDA aims to find an embedding transformation that respects the discriminant structure inferred from the labeled data and the intrinsic geometrical structure inferred from both the labeled and unlabeled data. We also show that SSFDA can be extended to nonlinear dimensionality reduction scenarios by applying the kernel trick. The experimental results on face recognition demonstrate the effectiveness of our proposed algorithm.

关键词：费希尔判别分析法鉴别分析离散度降维方法

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Subspace Semi-supervised Fisher Discriminant Analysis

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Acta Automatica Sinica 2009年第12期35卷 1513-1519页

作者： Wu-Yi YANG Wei LIANG Le XIN Shu-Wu ZHANG Hi-tech Innovation Center Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Minister of Education Xiamen University Xiamen 361005 P. R. China College of Oceanography and Environmental Science Xiamen University Xiamen 361005 P. R. China School of Electronics Information and Control Engineering Beijing University of Technology Beijing 100124 P. R. China

关键词： Fisher discriminant analysis (FDA) semi-supervised learning manifold regularization dimensionality reduction

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Based on Single-Chip Adaptive Fuzzy Algorithm Escalator Energy-Saving control System

Based on Single-Chip Adaptive Fuzzy Algorithm Escalator Ener...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Hao Liu Hong He Sheng-Lei Han Jin-Rong Yang Lei Su Fang Liu Tianjin Key Laboratory for Control Theory and Application Complicated Systems Tianjin University of Technology Tianjin China Tianjin Power Grid Company Power Test and Research Institute Tianjin China

To solve the problem caused by the inherent design of AC motor that 20%~40% energy of traditional escalator goes to waste in vain in the form of heat, this paper puts forward to the best control project of the escalator energy-saving control-adopting instantaneous detect technology, single-chip control, intelligent control system with speed control and voltage control and frequency converter, based on adaptive fuzzy algorithm to diagnose the fault of the escalator, detect dynamic state person (two class) by single-chip control, automatic transformation escalator frequency converter controller's work method like speed control and voltage control, and safety monitor protection circuit to optimize the performance of the escalator. The practice shows that energy can be saved more than 40% by this system.

关键词： Programmable control Adaptive control Fuzzy control Fuzzy systems control systems Temperature control Automatic voltage control Fault detection Velocity control Voltage control

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A novel temperature-insensitive strain sensor based on tapered fiber grating

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Optoelectronics Letters 2007年第5期3卷 342-345页

作者： YANG Xian-hui YU Yong-sen ZHANG Qiu-hua SUN Sheng-he Department of Automatic Test and Control Harbin Institute of Technology Harbin 150001 China State Key Laboratory on Integrated Optoelectronics Jilin University Changchun 130023 China Department of Astronautic Engineering and Mechanics Harbin Institute of Technology Harbin 150001 China

A novel temperature-insensitive strain sensor based on bandwidth demodulation of the reflected light from the tapered fiber grating is presented, which is simple and low-cost and has considerable potential particularly application for strain sensing,and with the development of the interrogation system, it can demodulate both the bandwidth and the center wavelength of the reflected light from TFG to measure strain and temperature simultaneously.

关键词：光学纤维光栅传感器温度

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Strain sensing method based on the measurement of the reflected bandwidth from tapered fiber grating

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2007年第5期18卷 600-602页

作者： Yang, Xian-Hui Yu, Yong-Sen Zhang, Qiu-Hua Sun, Sheng-He Institute of Automatic Test and Control Harbin Institute of Technology Harbin 150001 China State Key Laboratory on Integrated Opto-electronics Jilin University Changchun 130023 China Dept. of Astronautic Engineering and Mechanics Harbin Institute of Technology Harbin 150001 China

We demonstrate the feasibility to make a temperature-independent strain sensor by measuring the bandwidth of the reflected light from the tapered fiber grating (TFG). This simple and low-cost sensor approach has a considerable potential, particularly application to strain sensing in the smart structures. The experimental results show that the method is suitable for distribution measurement, and it can restrain the influence of source fluctuation.

关键词： Diffraction gratings

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Hierarchical Identification Principle and a Family of Iterative Methods

Hierarchical Identification Principle and a Family of Iterat...

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Chinese control Conference (CCC)

作者： Feng Ding Ming Li Jiyang Dai Control Science and Engineering Research Center Southern Yangtze University Wuxi China Key Laboratory of Nondestructive Test Nanchang Institute of Aeronautical Technology China

In this paper, we extend the well-known Jacobi and Gauss-Seidel iterations to present a large family of iterative methods. The proposed methods are applied to develop iterative solutions to the matrix equation AXB = F and the generalized Sylvester matrix equation AXB + CXD = F by means of a hierarchical identification principle. We prove that the iterative solutions converge to the exact solutions for any initial values. The algorithms proposed require less storage capacity than the existing numerical ones. The iterative methods can be applied to system parameter identification problems.

关键词： Iterative methods Jacobian matrices Gaussian processes Equations Speech synthesis Field-flow fractionation Laboratories Nondestructive testing control engineering education Educational technology

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Blind signal separation and reverberation cancelling with active sonar data

Blind signal separation and reverberation cancelling with ac...

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8th International Symposium on Signal Processing and its Applications, ISSPA 2005

作者： Cong, Fengyu Hu, Yifan Shi, Xizhi Chen, Chi Hau Lin, Liangji State Key Laboratory of Vibration Shock and Noise Shanghai Jiao Tong University Dongchuan Road 800# Shanghai China Electrical and Computer Engineering Dept. University of Massachusetts Dartmouth Dalian Scientific Test and Control Technology Institute

ISBN: (纸本)0780392434

With easily available prior knowledge, we explore a new approach for nulling of reverberation through separating active sonar data into reverberation and moving target echo. From the perspective of signal processing, the method, as outlined below, is based on active sonar data properties and the process of how reverberation is formulated. It is assumed that active sonar data can be separated into two parts that are target echo signal and reverberation. First, we generate a backward matrix from active sonar data to approximate the classical blind signal separation model. Second, after blind signal separation is performed on the backward matrix, separation is done. Third, the estimated signal with the largest kurtosis is selected as the desired target echo signal and the reverberation is cancelled at the same time. Fourth, the human hearing feature helps the process to be adaptive. The real sea experiment proves the method to be effective. © 2005 IEEE.

关键词： Blind source separation

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Blind signal separation and reverberation cancelling with active sonar data

Blind signal separation and reverberation cancelling with ac...

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International Symposium on Signal Processing and Its Applications (ISSPA)

作者： Fengyu Cong Yifan Hu Xizhi Shi Chi Hau Chen Liangji Lin State Key Laboratory of Vibration Shanghai Jiaotong University Shanghai China Electrical and Computer Engineering Department University of Massachusetts Dartmouth USA Dalian Scientific Test and Control Technology Research Institute

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