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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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Digital down conversion of the simulink modeling and FPGA implementation

Digital down conversion of the simulink modeling and FPGA im...

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Joint Conference of the 2009 Symposium on Piezoelectricity, Acoustic Waves, and Device applications, SPAWDA 2009 and 2009 China Symposium on Frequency control Technology

作者： Sun, Hong He, Hong Li, Li Jiuquan Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Application in Complicated Systems Tianjin 300384 China Tianjin Tig Construction Co. Ltd. Tianjin 300010 China

ISBN: (纸本)9781424449507

Digital down converter is the core technology of soft radio receivers. It lets the high-speed-sampled digital signals down-conversion to base band down at first. Then extraction, low-pass filter are conducted. This paper focuses on modeling and simulation by SIMULINK of digital mixing converter part and CIC decimation filter part of digital down converter and the realization on FPGA. The results show that the digital down-conversion, to reduce redundant data extraction method, can effectively solve those issues of too large computation pressure and too broad frequency-band channel encountered in the conventional A / D sampling DSP digital signal processing. © 2009 IEEE.

关键词： Finite element method

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A novel fingerprint recognition algorithm using 2DPCA and RBFNN

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Journal of Information and Computational Science 2009年第4期6卷 1899-1906页

作者： Ni, Jianyun Xu, Qinmin Lei, Ming Luo, Jing Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin 300191 China School of Electrical Engineering Tianjin University of Technology Tianjin 300191 China School of Computer Science and Technology Tianjin University of Technology Tianjin 300191 China College of Electrical Engineering and Automation Tianjin Polytechnic University Tianjin 300160 China

Fingerprint recognition algorithm based on minutiae has large computation, slow recognition speed as a result of complex processing, such as image enhance, smooth, binary, and thinning. A novel fingerprint recognition algorithm Using 2DPCA(Two-Dimensional Principal Component Analysis) has been proposed in this paper. Firstly, original images are decomposed into high-frequency and lowfrequency components with the help of Wavelet Transform (WT), and high-frequency components are ignored, so the prime features of original images can be attained. Secondly, the projected features are solved by 2DPCAFinallyfingerprint recognition can be realized by Radial Basis Function Neural Network (RBFNN). The algorithm combines the optimization of the 2DPCA and the adaptability of RBFNN. The experimental results based on FVC2002 have verified that the proposed algorithm has higher robustness to the fingerprint images which has the change of shift and rotation and light than IDFFWNN. © 2009 Binary Information Press.

关键词： Wavelet transforms

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Research and realization of no-medium Hardware-In-The-Loop simulation system

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Beijing Gongye Daxue Xuebao / Journal of Beijing University of Technology 2008年第SUPPL. 2期34卷 108-112页

作者： Gao, Qiang Li, Si-Jun Han, Miao Liu, Yi-Lin Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems School of Electrical Engineering Tianjin University of Technology Tianjin 300383 China

This paper aims at the problem that Hardware-In-The-Loop (HITL) simulation still relies on the medium in flow industry and designs a new kind of HTIL simulation system, in which there is no medium and the controllers are software simulation. The paper which makes use of the simulation modeling theoretics, control and communication technology realizes this kind of system with the boiler of flow industry as the typical target. The practice results show this technology is feasible, completely satisfies practice request, and due to no-medium in the system, it not only debases costs of constitution and maintenance, but also has the characteristic of green and environmental protection.

关键词： Hardware-in-the-loop simulation

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Automatic Vacuum Mud Still (AVMS) control system for gas measuring and logging

Automatic Vacuum Mud Still (AVMS) control system for gas mea...

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4th International Symposium on Precision Mechanical Measurements

作者： He, Hong Cui, Xin Pan, Hongyan Han, Shenglei Jia, Hengtian Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Application in Complicated Systems Tianjin 300191 China Tianjin Radio TV University Tianjin 300191 China

Gas Logging is important for discovering and evaluating oil gas zones in the course of logging. Aimed at the features of gas logging in our country, a new method of automatic vacuum mud still (AVMS) is presented for the first time, which has no basic distortion of gas samples and overcomes the limitations of basic distortions caused by uncontrolled blending air in the samples in traditional degassing methods. This paper develops the theoretical basis of the system design, the working principle of AVMS, the gas flow path and its characteristics. It is proved by experimental results, that the hydrocarbon content of the sample produced by this system is ten times higher than by routine degasser. As a result, the accuracy of gas reconnaissance is improved. © 2008 SPIE.

关键词： Gases

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The applications and simulation of adaptive filter in noise canceling

The applications and simulation of adaptive filter in noise ...

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International Conference on Computer Science and Software Engineering, CSSE 2008

作者： Ying, He Hong, He Li, Li Yi, Wu Hongyan, Pan Tianjin Key Laboratory for Control Theory and Application in Complicated Systems Tianjin University of Technology Tianjin 300191 China Tianjin Radio and TV University Tianjin 300191 China

ISBN: (纸本)9780769533360

In practical application, the statistical characteristics of signal and noise are usually unknown or can't have been learned so that we hardly design fix coefficient digital filter. In allusion to this problem, the theory of the adaptive filter and adaptive noise cancellation are researched deeply in the thesis. According to the LMS and the RLS algorithms realize the design and simulation of adaptive algorithms in noise canceling, and compare and analyze the result then prove the advantage and disadvantage of two algorithms. We simulates the adaptive filter with MATLAB, the results prove its performance is better than the use of a fixed filter designed by conventional methods. © 2008 IEEE.

关键词： Adaptive filters

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The Modeling and Simulation of the Car-following Behavior Based on Fuzzy Inference

The Modeling and Simulation of the Car-following Behavior Ba...

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International Workshop on Modelling, Simulation and Optimization, WMSO

作者： Qiang Gao Shuliang Hu Chao Dong Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems TianJin University of Technology Tianjin China

Car-following is hard to describe drivers' behavior with precise algorithm because of its indetermination and fuzzy characteristic when the drive controls the vehicle. An algorithm of car-following model is founded and simulated based on fuzzy inference on the basis of it. The simulation results show that it is feasible to describe drivers' behavior with fuzzy controller.

关键词： Vehicle driving Fuzzy control Vehicles Fuzzy systems control systems Inference algorithms Vehicle safety Chaos Laboratories control theory

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Application of drilling fluid density detection based on intelligent sensor

Application of drilling fluid density detection based on int...

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4th International Symposium on Precision Mechanical Measurements

作者： He, Hong Jia, Hengtian Pan, Hongyan Han, Shenglei Cui, Xin Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Application in Complicated Systems Tianjin 300191 China Tianjin Radio and TV University Tianjin 300191 China

This paper introduces a new method to detect drilling fluid density based on intelligent sensor, the core of which is silicon resonant sensor technology. Two H model resonant beams locating single crystal silicon resonant sensor con vert differential pressure to frequency signals respectively, then difference of two frequency signals are transmitted to CPU, export 4~20mA signal corresponding drilling fluid density after D/A converter. This method get over the short comings of typical drilling fluid density detection used piezocapacitive sensor, such as low accuracy, shattered easily, easy drift...ect., has high precision, stability and reliability characters. © 2008 SPIE.

关键词： Single crystals

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The Study of Model-Free Adaptive controller Based on dSPACE

The Study of Model-Free Adaptive Controller Based on dSPA...

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International Symposium on Intelligent Information Technology Application, IITA

作者： Gao Qiang Ren Dexue Dong Chao Jia Zefang Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

This paper introduces the study of the model-free adaptive controller based on the dSPACE real-time simulation system, and analyses its control algorithms and application steps. It uses the model-free adaptive control algorithm based on the tight format linear method; this method has simple structure and can translate a complex non-linear system into a single parameter with time-varying linear system. The analysis and simulation tests show good functions of the model-free adaptive control method.

关键词： Programmable control Adaptive control Mathematical model Real time systems Analytical models control system synthesis Software testing System testing Process control Open loop systems

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Omnidirection image restoration based on spherical perspective projection

Omnidirection image restoration based on spherical perspecti...

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IEEE Asia-Pacific Conference on Circuits and systems

作者： Baofeng Zhang Zhiqiang Qi Junchao Zhu Zuoliang Cao Tianjin Key Laboratory for Control Theory & Applications Complicated Systems Tianjin University of Technology Tianjin China School of Mechanical Engineering Tianjin University of Technology Tianjin China

Because of its advantage of panoramic sight with a single compact visual scene, omni-directional vision technology has extreme application value in many fields. One of the most effective ways to establish omni-directional vision system is using fisheye lens. However it brings a strong unavoidable inherent distortion while it provides hemispherical field of view. But it can be corrected by some image processing techniques. A method for correction of such distorted image is derived in this paper. After introducing two kings of perspective projection model briefly, we will transform the fisheye image to perspective projection image by using spherical perspective projection model and establish a mathematic transform model from fisheye image to perspective projection image. In addition, a simple method to find out the optic center and the radius of the projection sphere from the property of the fisheye image which needed in rectifying the fisheye image will be derived. Usually the algorithm is implement by software on PC, but its processing speed is too slow for some applications, which need the real time image information. Considered these, we implement the algorithm of rectification on FPGA to make the processing speed to fit the requirement of the real time application. The experiments demonstrate the correctness and effectiveness of the model and the results are satisfactory.

关键词： Image restoration Mathematical model Application software Layout Machine vision Lenses Image processing Mathematics Nonlinear optics Optical distortion

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