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IEEE International Conference on Mechatronics and Automation

作者： Yuefei Wang Jianghong Han Ye Wu Hao Peng Engineering Research Center of Measurement and Control in Safety Critical Industry Ministry of Education School of Mechanical and Automobile Engineering School of Computer and Information Hefei University of Technology Hefei Anhui China School of Computer and Information School of Instrument Science and Opto-Electronic Engineering Hefei University of Technology Hefei Anhui China

-The dynamic performance quality of SCDCS (Safety Critical Distributed control System) is pertinent to its dependability. To achieve the prescribed dynamic performance, a performance index describing converged speed of system states is established based on the model-building of SCDCS that is networked on its state feedback loop. Meanwhile, a sufficient condition, which can guarantee SCDCS to be asymptotically stable under prescribed performance constraints, is derived by employment of the Lyapunov theory and the matrix measurement. Based on the condition, an algorithm for obtaining maximum allowable transfer interval is presented. Results of simulation indicate that the design method is less conservative and can not only guarantees system asymptotically stable, but also make it have desired dynamic performance.

关键词： Distributed control Stability control systems Vehicle safety Vehicle dynamics Automotive engineering Electrical equipment industry Industrial control Performance analysis Actuators

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3D measurement technology based on gray coding light by combining gray code with trapezoidal phase shift

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Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2009年第SUPPL.期30卷 300-304页

作者： Shan, Lina Yu, Xiaoyang Fu, Xiao Wu, Haibin Chen, Deyun College of Measurement Control Tech. and Communication Engineering Harbin University of Science and Technology Harbin 150080 China

An 3D measurement scheme by combining Gray code with Trapezoidal phase-shift is presented. The scheme computes the relative intensity ratios in a Trapezoidal phase-shift period using Trapezoidal phase-shift pattern. Combining the Trapezoidal phase-shift with Gray code corresponding to sampling point, and the absolute intensity ratio of sampling point is determined. Then, 3D measurement is realized using projection geometry matrix model. Encoding and decoding principles by combining Gray code with Trapezoidal phase-shift are presented;period dislocation between Gray code and Trapezoidal phase-shift in course of decoding is analyzed, which could be corrected by judging the consistency between Gray code value increasing and phase mutation of adjacent pixels. Finally, simulation and real system were experimented. The experimental results indicate that relative measurement error of simulation system is about 0.0325% and that of real system is less than 4.0329%.

关键词： Decoding

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Study of assembly line dynamic balancing based on simulation

Study of assembly line dynamic balancing based on simulation

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International technology and Innovation Conference 2009 (ITIC 2009)

作者： Hongjun Wang Hongfeng Wang Huaicun Zhang School of Mechanical and electronic Engineering Beijing Information Science and Technology University Beijing China Key Laboratory of Modem Measurement & Control Technology Ministry of Education Beijing China Yantai Economic Technology Development Zone Yantai China

An assembly line balancing method based on Genetic algorithm (GA) and visual simulation is proposed for the assembly line dynamic balancing in order to take into account more factors in addition to the implicit factors. Firstly, the assembly line virtual digital model is created based on systematic layout planning (SLP). Secondly, the GA for solving assembly line dynamic balancing is presented on the conditions that minimize the number of stations and the tasks assigned to a set of workstations with the same cycle time. In the view of assembly line visual modelling and simulation, the visual simulation based on eM-plant is adopted. This system framework and simulation process is discussed. The assembly line balancing system is developed based on the object-oriented language VC++6.0 with the access database. The gear-box assembly line case is studied by using this system. The results showed the method is valid and effective. It can be used to provide the technology support for improving the production efficiency and redesigning the assembly line for the manufacturing plant.

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Data Filtering Based Recursive Least Squares Parameter Estimation for ARMAX Models

Data Filtering Based Recursive Least Squares Parameter Estim...

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WRI International Conference on communications and Mobile Computing, CMC

作者： Yuwu Liao Dongqing Wang Feng Ding Department of Physics and Electronics Information Technology Xiangtan University Xiangtan China College of Automation Engineering Qingdao University of China Qingdao China School of Communication and Control Engineering Jiangnan University Wuxi China

This paper uses an estimated noise transfer function to filter the input-output data and presents a filtering based recursive least squares algorithm for ARMAX models. Through the data filtering, we obtain two identification models, one including the parameters of the system model, and the other including the parameters of the noise model. Thus, the recursive least squares method can estimate the parameters of these two identification models, respectively, by replacing unmeasurable noise terms in the information vectors with their estimates. The proposed F-RLS algorithm has high computational efficiency because the dimensions of its covariance matrices become small and can generate more accurate parameter estimation compared with other existing algorithms.

关键词： Least squares approximation Parameter estimation Autoregressive processes Recursive estimation Filtering algorithms Least squares methods Mobile communication Educational institutions Predictive models Mobile computing

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Analysis on influence of image quality for errors of CCD mosaics technology

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Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2009年第SUPPL.期30卷 115-119页

作者： Yang, Ling School of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150040 China

Present application status of CCD mosaics is introduced the error type which the technology of CCD mosaic produced is analyzed. A model which can analyze influence for overlap error of CCD mosaics to image quality is built. Modulation transfer function (MTF) is used as evaluating indicator which analyzes the influences of overlap error linear error and coplane error. The emulation produced that the three kinds of error influenced the image quality linear error influence is more at one direction with the same deflection angle coplane error influence decrease with the increasing of F number. Overlap error influenced image quality of adjacent of CCD edge and reduction pixel size can decrease the influence.

关键词： Errors

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Design of optimal fuzzy logic-PID controller using bee colony optimization for frequency control in an isolated wind-diesel system

Design of optimal fuzzy logic-PID controller using bee colon...

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IEEE/PES Transmission and Distribution Conference and Exhibition: Asia and Pacific

作者： T. Chaiyatham I. Ngamroo S. Pothiya S. Vachirasricirikul Department of Electrical Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Center of Excellence for Innovative Energy Systems King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand School of Communication Instrumentation & Control Sirindhorn International Institute of Technology Thammasat University Thailand

ISBN: (纸本)9781424452293

Generally, the inevitable problems in the fuzzy logic-PID (FLPID) control design are the trial and error of the setting of scale factors, membership functions and control rules. To solve these problems, this paper proposes the optimal FLPID controller design using bee colony optimization (BCO) for the load frequency control in the microgrid system. The considered microgrid is the hybrid wind-diesel isolated system. The BCO is applied to automatically optimize the FLPID controllers of governor in the diesel side and blade pitch control in the wind side. Simulation studies show the superior robustness of the optimal FLPID against system parameters variation in comparison with the optimal PID controller and the non-optimal FLPID controller.

关键词： Fuzzy control Fuzzy logic Fuzzy systems Optimal control control systems Design optimization Frequency control Automatic control Fuzzy sets control design

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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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A novel load variation compensation algorithm in a sensor-less brushless DC motor drive for a reciprocating compressor

A novel load variation compensation algorithm in a sensor-le...

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International Conference on Telecommunications Energy (INTELEC)

作者： Sang-Taek Lee Hee-Jun Kim Dae-Kyong Kim Kwang-Woon Lee Dept. of Electronics Electrical Control and Instrumentation Engineering Hanyang Univ. Korea Digital Convergence Center Korea Electronics Technology Institute Korea School of Electrical Engineering and Computer Science Hanyang Univ. Korea Division of Maritime Electronics and Communication Engineering Mokpo National Maritime Univ. Korea

ISBN: (纸本)9781424424900

This paper presents a novel load variation compensation algorithm in a sensor-less BLDC motor drive for a reciprocating compressor. Periodic load variation of a reciprocating compressor leads to commutation position error and instantaneous speed variation and causes large peak currents. The major concept of this study includes tracking the pattern of load torque and controlling the motor input voltage by the commutation point and PWM depending on the tracked load torque. The suggested method can reduce the cost because this method does not require additional current sensing or voltage comparison circuit. The utility of the suggested algorithm was confirmed by simulation and experimental results of a sensor-less BLDC motor drive.

关键词： Load management Brushless DC motors Torque Commutation Pistons Voltage control Refrigeration Rotors Home appliances Force control

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Cooling hot rolling steel strip using combined tactics

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Journal of University of Science and technology Beijing 2008年第3期15卷 362-365页

作者： Li Peng Qing Li Zhou Zhou School of Communication and Control Engineering Jiangnan University Wuxi 214122 China School of Information Engineering University of Science and Technology Beijing Beijing 100083 China

The coiling temperature control of a typical steel strip mill was investigated. Due to the high speed of a strip and complex circumstance, it is very hard to set up a cooling model with high accuracy. A simplified dynamic model was proposed, based on which a cooling control scheme with combined feedforward, feedback and adaptive algorithms was developed. Meanwhile, the genetic algorithms were used for the optimization of model parameters. Simulations with a model validated using actual plant data were conducted, and the results have confirmed the effectiveness of the proposed control methods. At last, a simulation system for coiling temperature control was developed. It can be used for new product trials and newcomer training.

关键词： coiling temperature temperature control feedforward feedback adaptive algorithm simulation

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Distribution of combustible gas alarm based on embedded Ethernet technology

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Journal of Harbin Institute of technology(New Series) 2008年第2期15卷 220-223页

作者：丁喜波张俊杰王洋 Space Optics Research Center School of AstronauticsHarbin Institute of Technology College of Measure-control Technology & Communication Engineering Harbin University Science and Technology Heilongjiang Provincial Institute of Measurement and Verification

One kind of combustible gas alarms based on industrial Ethernet was designed to prevent the gas leakage in industrial production sites, The alarm adopted the high performance microprocessor LPC2214 as the main chip. The embedded operating system μC/OS-Ⅱand TCP/IP protocol stack uIP running on LPC2214 constitute a development platform of application of the combustible gas alarm, The test shows that it can automatically and continuously detect combustible gas in industrial production sites in several positions;it can give out sound-light alarm and take protective measures immediately against the gas leakage; and it can send the detected data to PC through the Ethernet interface to realize the remote detection. The designed project provides a reference to design industrial devices based on industrial Ethernet

关键词： industrial Ethernet combustible gas alarm embedded system

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