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ESA in high-order descriptor linear systems via output feedback

International Journal of control, automation and Systems 2010年第2期8卷 408-417页

作者： Yu, Hai-Hua Duan, Guang-Ren Department of Automation Heilongjiang University and the School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China

This paper considers eigenstructure assignment (ESA) in high-order descriptor linear systems via output feedback. Parametric expressions for the left and right closed-loop eigenvectors associated with the finite closed-loop eigenvalues and two simple and complete parametric solutions to the feedback gain matrix are obtained on the basis of the parametric solution to the generalized high-order Sylvester matrix equation. This approach does not impose any restriction on the closed-loop eigenvalues. The numerical example illustrates the effectiveness of the proposed approach.

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Hardware design of features extraction using wavelet packet method for intelligent diagnostic system

Hardware design of features extraction using wavelet packet ...

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International Symposium on Computer Communication control and automation (3CA)

作者： Chung-Chi Huang Cong-Hui Huang Yi-Ming Tsao Shih-Chuan Huang Hao-Lun Huang Department of Automation and Control Engineering Far East University Tainan Taiwan Department of Electrical Engineering National Taiwan University of Science and Technology Taipei Taiwan

ISBN: (纸本)9781424455652;9781424455669

This paper aims to develop a hardware architecture of features extraction using wavelet packet method for an intelligent diagnostic system. Verilog-based features extraction architecture is proposed and implemented. Test results verify the design architecture of features extraction using wavelet packet method. A CNC spindle motor commonly featured in intelligent diagnosis of manufacturing systems is chosen to verify this architecture. Under the normal and eccentric spindle states, system modeling is built up for a high speed (10,000RPM), medium speed (5,000RPM) and low speed (1,000RPM) The test results of samples of different rotating speeds under the normal and eccentric spindle states show the effect of the hardware of features extraction and verify the feasibility of hardware design.

关键词： Hardware Feature extraction Wavelet packets Intelligent systems Low pass filters Wavelet transforms Intelligent manufacturing systems Intelligent sensors Signal generators Design automation

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A multithread based new sparse matrix method in bioluminescence tomography

A multithread based new sparse matrix method in bioluminesce...

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Medical Imaging 2010 - Biomedical Applications in Molecular, Structural, and Functional Imaging

作者： Zhang, Bo Tian, Jie Liu, Dan Sun, Li Yang, Xin Han, Dong Sino-Dutch Biomedical and Information Engineering School of Northeastern University Shenyang 110004 China Medical Image Processing Group Institute of Automation Chinese Academy of Sciences P. O. Box 2728 Beijing 100190 China Department of Electronic Information and Control Engineering Beijing University of Technology China

ISBN: (纸本)9780819480279

Among many molecular imaging modalities, bioluminescence tomography (BLT) stands out as an effective approach for in vivo imaging because of its noninvasive molecular and cellular level detection ability, high sensitivity and low cost in comparison with other imaging technologies. However, there exists the case that large scale problem with large number of points and elements in the structure of mesh standing for the small animal or phantom. And the large scale problem's system matrix generated by the diffuse approximation (DA) model using finite element method (FEM) is large. So there wouldn't be enough random access memory (RAM) for the program and the related inverse problem couldn't be solved. Considering the sparse property of the BLT system matrix, we've developed a new sparse matrix (ZSM) to overcome the problem. And the related algorithms have all been speeded up by multi-thread technologies. Then the inverse problem is solved by Tikhonov regularization method in adaptive finite element (AFE) framework. Finally, the performance of this method is tested on a heterogeneous phantom and the boundary data is obtained through Monte Carlo simulation. During the process of solving the forward model, the ZSM can save more processing time and memory space than the usual way, such as those not using sparse matrix and those using Triples or Cross Linked sparse matrix. Numerical experiments have shown when more CPU cores are used, the processing speed is increased. By incorporating ZSM, BLT can be applied to large scale problems with large system matrix. © 2010 Copyright SPIE - The International Society for Optical engineering.

关键词： Phantoms

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Hybrid powertrain concept evaluation using optimization

Hybrid powertrain concept evaluation using optimization

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25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010

作者： Murgovski, Nikolce Fredriksson, Jonas Sjöberg, Jonas Norén, Bengt Department of Signals and Systems Division of Automatic Control Automation and Mechatronics Chalmers University of Technology Gothenburge Sweden Complete Powertrain Powertrain Engineering Volvo Cars Corporation. Dept 97520-PV3B-Gothenburge Sweden

This paper describes automatic evaluation of series-parallel (combined) powertrain models using optimization. The novelty with the approach is the possibility to work with non-transparent industrial vehicle models, hidden for intellectual property reasons. The contribution extends the functionality of a recently developed tool for parallel hybrids, with the ability to operate on combined powertrains. Given the user inputs, which include dynamic vehicle model and driving cycle, the tool first produces a simplified powertrain model in the form of static maps, before dynamic programming is used to find an optimal torque split that minimizes fuel consumption. The main use of the tool is to evaluate the potential of a powertrain configuration. The paper contains an illustration of the tool operation on a non-transparent industrial vehicle model. The only requirement on the model is to provide access to some general variables and that it has a torque split that can be fully controlled.

关键词： Hybrid vehicles

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Striking Sound Extracting Based on Approximate Entropy

Striking Sound Extracting Based on Approximate Entropy

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The 22nd China control and Decision Conference(2010年中国控制与决策会议)

作者： Zhihua Qiao Chuan Lin Zijuan Wang Automation College Shenyang Institute of areonautical Engineering Shenyang 110136 Electronic Information And Control Engineering Department of Guangxi University Of Technology Liuzh Shenyang Northeastern Automation Company Shenyang 110179

ISBN: (纸本)9781424451814;9781424451821

The extract accuracy of signal is vital to signal process, directly affects result of all next doing. To sound signal Approximate Entropy was taken as acoustics character to analyze sound signal got by experiment, and judging it’s start and stop point accurately, then extracting striking sound from original signal. It is proved by experiment result the aim of extracting striking signal is satisfied by the method and preferences.

关键词： Approximate Entropy (ApEn) striking sound environment noise threshold mode

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Real-time on-line parameter estimation of linear switched reluctance motor

Real-time on-line parameter estimation of linear switched re...

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International Conference on Electrical Machines, ICEM

作者： N.C. Cheung J.F. Pan Jin-quan Li Department of Electrical Engineering Hong Kong Polytechnic University Hong Kong China Department of Automation College of Mechatronics and Control Engineering Shenzhen University Shenzhen China

The on-line least-square identification method is applied for the linear switched reluctance motor (LSRM) based closed-loop control system. Since switched reluctance motors have severe nonlinear characteristics, on-line system identification for model parameters is the basis for precise modeling and effective control algorithms. By on-line parameter identification of LSRM with least-square scheme, the parameter characteristics can be predicted despite of operation variations. The experimental results demonstrate the identification scheme has fast response and converging speed and the capability of effective parameter prediction under different conditions.

关键词： Parameter estimation Switches Reluctance motors Mathematical model Electrical engineering Real time systems

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The optical property measurement of the mixture of methanol and ethanol based on laser interferometer

The optical property measurement of the mixture of methanol ...

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International Symposium on Computer Communication control and automation (3CA)

作者： Kuo-Ying Chen Ming-Jyi Jang Chia-Hsing Shen Yen-Liang Yeh Cheng. Chi. Wang Chi. Wen. Lee Department of Mechanical Engineering Far East University Tainan Taiwan Department of Automation and Control Engineering Far East University Tainan Taiwan Department of Mechanical Engineering Far East University South Korea

ISBN: (纸本)9781424455652

This study develops a high precision non destructive measurement technique based on a laser interferometer for determining the mixture of methanol and ethanol from its refractive index. The optical metrology system is employed to measure the refractive indexes of mixture sample with known methanol and ethanol. The ratio set of the mixture sample have seven sets. The refractive index of the ethanol solution with the methanol alcohol is reduced. When the mixture solution includes the methanol and ethanol, the refractive index of the mixture solution is between the refractive index of the ethanol and methanol. When the refractive index of the solution is very close the refractive index of the ethanol alcohol, the effect of the mixture solution in refractive index is very small. From this experimental result, the effect of the refractive index of the mixture solution in the refractive index of the ingredient liquid is very clear.

关键词： Optical interferometry Methanol Ethanol Refractive index Optical refraction Optical variables control Optical sensors Optical mixing Mechanical engineering Biomedical optical imaging

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Investigation of a rotary-linear switched reluctance motor

Investigation of a rotary-linear switched reluctance motor

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International Conference on Electrical Machines, ICEM

作者： J.F Pan N.C. Cheung Guang-zhong Cao Department of Automation College of Mechatronics and Control Engineering Shenzhen University Shenzhen China Department of Electrical Engineering Hong Kong Polytechnic University Hong Kong China

A novel direct-drive rotary-linear switched reluctance motor (RLSRM) is proposed. The motor has the advantages of robust mechanical structure, low manufacture cost and capability of operation under hostile environments. Simulation tools such as finite element analysis (FEA) are applied for the verification of motor performance and corresponding experiments are carried out to testify the simulation results. The authors expect that the innovative actuator design can be applied in industrial applications that require both rotary and linear motions.

关键词： Reluctance motors Force Torque Finite element methods Stator windings Switches

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Parameter identification of a linear permanent magnet motor using particle swarm optimization

Parameter identification of a linear permanent magnet motor ...

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7th Annual International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2010

作者： Therdbankerd, Tithiwat Sanposh, Peerayot Chayopitak, Nattapon Fujita, Hideaki Department of Electrical Engineering Intelligent Mechatronics Automation Robotics and Control Laboratory Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center 112 Thailand Science Park Phahonyothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand Department of Electrical and Electronic Engineering Tokyo Institute of Technology S3-18 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan

ISBN: (纸本)9789746724913

Accurate and effective parameter identification is an important engineering task in high performance control system design. One emerging approach to effectively identify such nonlinear or dynamic unknown parameters is to use Particle Swarm Optimization (PSO) algorithm. Linear Permanent Magnet (LPM) motor is a high performance actuator employed in many applications that require direct linear motion without mechanical transmission for high acceleration and accurate positioning. Therefore, accurate motor parameters are necessary to effectively control the LPM motors. This paper proposes a simple PSO based method with chirp inputs to identify the LPM motor's parameters. The simulations and experiments are conducted to verify the results and determine the effectiveness of the proposed method.

关键词： Parameter estimation

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Single Source Current Drive Patterns for Electrical Impedance Tomography

Single Source Current Drive Patterns for Electrical Impedanc...

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IEEE Instrumentation & Measurement Technology Conference

作者： Lifeng Zhang Huaxiang Wang Department of Automation North China Electric Power University Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation TianjinUniversity

ISBN: (纸本)9781424428328;9781424428335

Electrical impedance tomography (EIT) is a technique for reconstructing conductivity of an inhomogeneous medium by injecting currents at the boundary of an object and measuring the resulting changes in voltage. The SNR of acquisitive data and the reconstructed image quality of EIT system are directly determined by current drive patterns. In this paper, eight current drive patterns with the same boundary voltage measurement strategy have been studied. The isopotential lines, the number of independent measurements, measured voltage dynamic range, voltage change with conductivity change and reconstructed image quality of these patterns are compared, through which an optimal current drive pattern was obtained.

关键词： Electrical impedance tomography Current drive pattern Finite element method Image reconstruction

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