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International Conference on Mechanic Automation and control engineering (MACE)

作者： Zhu Lihui E Shiju Zhu Xilin Gao Chunfu Institute of Mechanical Science and Engineering Jilin University Changchun China Institute of Mechinery Equipment and Measurement & Control Technology Zhejiang Normal University Jinhua China

In order to improve the performance of servo-valve and reduce its cost, a new type of piezoelectric hydroelectric servo-valve is developed. The electrical-mechanical converter of the servo-valve is constructed by piezoelectric bender, which also functions as baffle of the hydraulic amplifier made by double-nozzles-baffle. Dynamic and static characteristic tests are conducted on the piezoelectric bender developed. In line with the performance of the valve, the dimensions of its components are calculated. The characteristic test system for servo-valve is built and the servo-valve is tested with it. The results show that flux hysteresis loop is less than 2%, resolution is less than 0.5%, nonlinearity is less than 3.5%, and its band width is up to 140Hz. So the new type of piezoelectric servo-valve is characterized by good performance.

关键词： Valves Output feedback Displacement control System testing Pressure control Costs Hysteresis motors Servomotors Mechanical variables measurement Voltage

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Modelling and control of blood glucose regulation in type i diabetic mellitus

Modelling, Measurement and Control A

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Modelling, measurement and control A 2010年第1-2期83卷 17-32页

作者： Vinopraba, T. Sivakumaran, N. Radhakrishnan, T.K. Raghavan, S. Dept of Instrumentation and Control Engineering India Dept of Chemical Engineering India Dept of Electronics and Communication Engineering National Institute of Technology Tiruchirappalli-620 015 T.N India

Diabetes Mellitus is a serious disease in which production and use of insulin in body is impaired, causing glucose concentration level to increase or decrease in the blood stream. The blood glucose level of the human body should be within the normal range of 70-110mg/dL. As the human body is highly non-linear, optimal multi-model controllers are designed based on PID controller and Genetic Algorithm (GA). The performances of the controller are compared based on settling time, peak overshoots and error criteria's such as Integral square Error (ISE), integral Absolute Error (IAE) and Integral Time Absolute Error (TTAE). The simulation results show that the GA based optimal controller is able to control the blood glucose regulation in Type I diabetic patient effectively.

关键词： Genetic algorithms

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A switching piecewise-linear control approach for generating of multi-scroll chaotic attractors

A switching piecewise-linear control approach for generating...

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International Symposium on Systems and control in Aerospace and Astronautics (ISSCAA)

作者： Mao Wang Guanghui Sun Lilian Huang Harbin Institute of Technology Harbin Space Control and Inertial Technology Research Center Heilongjiang China Space Control and Inertial Technology Research Center Harbin Institute of Technology Heilongjiang China College of Information and Communication Engineering Harbin Engineering of Technology Harbin Heilongjiang China

ISBN: (纸本)9781424460434

This work presents a method to generate a multi-scroll chaotic attractor by switched fractional system. Based on two piecewise-linear nonlinear functions, sub-models are constructed with the system order less than one. The switched system can demonstrate n-scroll chaotic attractors if its parameters and switching rule are suitably chosen. By analyzing the lyapunov exponent and the stability of the system, It's illustrated that chaotic attractors can be obtained with system orders as low as 0.9. Finally, Numerical examples are provided to verify the effectiveness of the proposed scheme.

关键词： Chaos Switches Switched systems Eigenvalues and eigenfunctions Indexes Numerical stability Stability analysis

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Design and circuit simulation of the new Lorenz chaotic system

Design and circuit simulation of the new Lorenz chaotic syst...

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International Symposium on Systems and control in Aerospace and Astronautics (ISSCAA)

作者： Lilian Huang Xiaoyan Wang Guanghui Sun College of Information and Communication Engineering Harbin Engineering of Technology Harbin Heilongjiang China Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin Heilongjiang China

ISBN: (纸本)9781424460434

In this paper, a new chaotic system is proposed. It also belongs to Lorenz system, which has three parameters and two nonlinear terms, and one of the parameters is the bifurcation parameter. The nonlinear dynamic properties of the system such as strange attractor, the largest Lyapunov index, fractal dimension, spectrum, power spectrum and bifurcation are researched via theoretical analysis and digital simulation. EWB software is used to design and simulate the circuit. The numerical and circuit simulation indicates the new nonlinear system proposed can show chaotic characteristics.

关键词： Chaotic communication Bifurcation Presses Mathematical model Indexes Numerical models

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The Determination of Microbicidal Effects of Corona Discharge Using the Image Analysis

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IFAC Proceedings Volumes 2010年第24期43卷 227-231页

作者： H. Sousková L. Kommová V. Scholtz A. Korbářová J. Julák Department of Computing and Control Engineering Institute of Chemical Technology in Prague Czech Republic Department of Physics and Measurement Institute of Chemical Technology in Prague Czech Republic First Faculty of Medicine Charles University in Prague Czech Republic

This paper presents an experimental apparatus for the decontamination and sterilization of water suspension of microorganisms and demonstrates the application of image analysis for the evaluation of decontamination efficiency by automatic counting of colonies on surface of cultivating medium. It was shown that the presented procedure of image analysis is adequate for this problem. The error of the automated cfu counting procedure is less than 5% in the comparison with manual counting. From the microbiological point of view it was found, that total inhibition of all four bacterial species and one of yeast occurs after 3 and 6 minutes of exposition to the corona discharge. Total inhibition of mould spores occurs after 20 minutes for one of used species only but it does not occurs even after 30 minutes of exposition for next two species under study.

关键词： Corona discharges image analysis sterilization microorganisms biotechnology

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Complete synchronization in weighted complex networks

Complete synchronization in weighted complex networks

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International Symposium on Systems and control in Aerospace and Astronautics (ISSCAA)

作者： Lilian Huang Meng Gao Guanghui Sun College of Information and Communication Engineering Harbin Engineering of Technology Harbin Heilongjiang China Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin Heilongjiang China

ISBN: (纸本)9781424460434

In this paper, the model of the weighted NW small-world networks is established when the topology of the network is given. Then the sufficient condition for synchronization in weighted networks is obtained by stability theory and matrix theory under the conditions of the weight is fixed. Moreover, the H-R neurons network is used to verify its feasibility via numerical simulation. Finally, the smallest coupled strength is obtained when connection probability is existent.

关键词： Neurons Synchronization Numerical stability Stability analysis Couplings Jacobian matrices Numerical models

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The circular-scanning algorithm in laser marking based on mathematical morphology: Design and implementation

The circular-scanning algorithm in laser marking based on ma...

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作者： Liu, Ling Wu, Huaiyu Cheng, Lei Wang, Yongji Zhu, Quanmin Department of Information Wuhan University of Science and Technology Wuhan 430081 China Engineering Research Center of Metallurgical Automation and Measurement Technology Ministry of Education in China Wuhan University of Science and Technology Wuhan 430081 China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Bristol Institute of Technology University of West of England Bristol BS161QY United Kingdom

ISBN: (纸本)9780955529337

Laser processing has excellent processing performance, making the laser processing technology used widely, bringing huge economic benefits. An efficient algorithm of circular scanning and the corresponding design and implementation in laser marking will be introduced in this article. The algorithm is based on mathematical morphological, and realized on Visual c++ and GDI+ platform. The distance of the scanning line we got in the original graphic is in accordance with our expectation, and the scanning time is not more than ***. Such stability and accuracy is originated from the core portion of the algorithm that is one-step scanning which makes each closed contour widen inspired by the thought of corrosion expansion algorithm and is aplicable to any curves so that assure reliability, such widen size is in accordance to scanning distance setted by users. This article can be divided into three parts: basics introduction, algorithm design, implementation. The results of numerous circular-scanning examples verify the effectiveness of the algorithm.

关键词： Scanning

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Sonar image denoising based on HMT model in morphological wavelet domain

Sonar image denoising based on HMT model in morphological wa...

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International Conference on Image Analysis and Signal Processing, IASP

作者： Enfang Sang Zhengyan Shen Hongyu Bian Yuanshou Li Underwater Acoustic Technology Key Laboratory of Science and Technology of National Defense Harbin Engineering of Technology Harbin China Department of Measurement and Control Technology China Aerodynamics Research Institute of Aeronautics Harbin China

Sonar images are susceptible to noise pollution that results in low contrast. And sonar image denoising technology is the key for subsequent target recognition. In this paper, an image denoising algorithm using wavelet transform was studied. Firstly, we constructed a morphological mean wavelet for gray image processing. Then the noisy sonar image was trained by the Hidden Markov Tree model in the morphological wavelet domain. According to the characteristics of the morphological mean wavelet, we classified multiresolution analysis of the noisy image in different directions, and removed noise according to the training result with Bayesian estimation. Finally, a desired denoising effect could be obtained by computing the average of different reconstructed images. Computer experiments show that our denoising algorithm can remove Gaussian noise of sonar image effectively. Compared with some classical wavelet denoising methods, image details are retained better.

关键词： Sonar Image denoising Wavelet domain Noise reduction Hidden Markov models Pollution Target recognition Wavelet transforms Image processing Wavelet analysis

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Application of Flexible Fuzzy control in Membrane Structure Inflation System

Application of Flexible Fuzzy Control in Membrane Structure ...

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International Conference on E-Product E-Service and E-Entertainment

作者： Qiushuang Liu Xiaoli Xu School of Mechanical & Vehicular Engineering Beijing Institute of Technology Beijing China Key Laboratory of Modern Measurement & Control Technology (Ministry of Education) Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781424471591

In order to eliminate steady-state errors and chatter caused by quantization error of the conventional fuzzy controller, based on the self-adjustment of quantified proportionality factors fuzzy controller, this paper establishes the flexible fuzzy controller, and can achieve the online parameters self-adjusting function. This method is used in inflation process of pneumatic membrane structure, which enables the inflation process to produce the smooth change in flexible frequency conversion. The results show that the flexible fuzzy logic controller has fast response speed and small steady-state error, meanwhile the parameters change of the controlled object has some flexible adaptability.

关键词： control systems Fuzzy control Biomembranes Atmospheric modeling Steady-state Process control Frequency control

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Trajectory tracking control of mobile robot moving along wall using single laser range finder

Trajectory tracking control of mobile robot moving along wal...

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29th IASTED International Conference on Modelling, Identification and control, MIC 2010

作者： Furuno, Seiji Kobayashi, Minora Yanagi, Kohei Hirano, Go Dept. of Control and Information Systems Engineering Kitakyushu National College of Technology 5-20-1 Shii Kokuraminami-ku Kitakyushu Fukuoka 802-0985 Japan Dept. of Brain Science and Engineering Kyushu Institute of Technology 2-4 Hibikino Wakamatsu Fukuoka Japan Dept. of Electrical and Communication Engineering Faculty of Humanity-Oriented Science and Engineering Kinki University 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan

In this study, a trajectory tracking control method of a mobile robot moving along a wall is proposed. The trajectory tracking control method consists of three control methods. The first one is a method that controls the mobile robot to move along a wall maintained constant. The second one is a method that controls the mobile robot to move along a wall in case of the wall direction changes. The third one is obstacle avoidance on a path. To measure a distance between the mobile robot and the wall, the changing direction of the wall and obstacles, we use a laser range finder. We developed a mobile robot which has two-driven wheels and the LRF to confirm the proposed method.

关键词： Identification (control systems)

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