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A coal hopper blockage detection based on multi-signal feature fusion

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society 2015年 30卷 561-564页

作者： Pan, Pan Wu, Hai Li, Haibin Huanghua Port Affairs of China Shenhua Energy Co. Ltd. Cangzhou061000 China Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao066004 China

Aiming at the requirements of high real-time and high accuracy for a coal hopper blockage detection in port, the paper proposed a program based on multi-signal feature fusion analysis to detect the coal hopper blockage. First we respectively extracted short-time energy and short-time zero crossing ratio, maximum spectrum of feature vectors of unit box of the vibration sensors and acoustic sensors, then use the Euclidean of neighboring eigenvectors combined with Kalman filter to judge the transient abnormal. Finally, the coal hopper blockage was synthetically judged by anomaly features. The results of the experiments based on labview virtual instrument platform showed that the scheme can quickly achieve funnel signals with high accuracy. ©, 2015, The editorial office of Transaction of China Electrotechnical Society. All right reserved.

关键词： Coal

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Output feedback control for T-S fuzzy models with unknown inputs

Output feedback control for T-S fuzzy models with unknown in...

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World Congress on Intelligent control and Automation (WCICA)

作者： Jianxiong Li Yiming Fang Chunyang Hu Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao Hebei Province China

This paper proposes an observer-based controller to stabilize Takagi-Sugeno (T-S) fuzzy models with unknown inputs, in which the unknown inputs need not satisfy the so-called observer matching condition. Firstly, an unknown input observer (UIO) is constructed to estimate the system states and unknown inputs, the observer gains are given in linear matrix inequality (LMI) terms. The controller is then developed under the framework of backstepping design, and a first-order filter is employed in each step of the recursive structure. The system stability is investigated based on the Lyapunov theory, and uniform boundedness property of the closed loop system is achieved. Finally, numerical simulation results are presented to illustrate the effectiveness of the proposed method.

关键词： Observers Output feedback Backstepping Numerical models Mathematical model Estimation error Closed loop systems

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Robust H-infinity space vector model of permanent magnet synchronous motor based on genetic algorithm

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Journal of Computational Information Systems 2014年第14期10卷 5897-5905页

作者： Zang, Huaiquan Qin, Zhe Dai, Yan Key Lab of Industrial Computer Control Engineering of Hebei Province Institute of Electrical and Engineering Yanshan University Qinhuangdao China

A robust H-infinity controller based on genetic algorithm optimization is designed for space vector control model of permanent magnet synchronous motor to improve the speed of tracking performance. A space vector control model of the system has been formed, and a quadrature-axis current loop transfer function based on a dynamic mathematical model of motor combined with decoupling technology is established. In order to obtain a good dynamic performance, the selection of the weighting function uses genetic algorithm to optimize in the process of designing the robust H-infinity. Simulation and analysis results show that the robust controller that based on genetic algorithm effectively improves the tracking performance and robustness of the system. © 2014 by Binary Information Press

关键词： Genetic algorithms

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Distributed edge control for multi-agent based on binocular vision system

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Journal of Computational Information Systems 2014年第7期10卷 2907-2915页

作者： Shao, Nuan Li, Huiguang Zou, Liying Liu, Le Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

For multiple Lagrange systems, the objective of distributed edge control problem is to drive all the followers converge to the edge of the convex hull spanned by the leaders. In this approach, we choose binocular vision system as sensing devices. Firstly, a pseudo-stereo visual model is proposed based on the concept of depth information sensitivity which can be used to provide the generalized coordinates of the leaders for all followers in the image coordinate system. Then, based on this new model, a distributed adaptive control algorithm is designed to compensate for the parametric uncertainties under a directed graph. Finally, the proposed control algorithm is applied to the multi-manipulators grasping control, simulation examples are provided to show the effectiveness of the controller. © 2014 Binary Information Press.

关键词： Multi agent systems

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The study of NAO robot arm based on direct kinematics by using D-H method

The study of NAO robot arm based on direct kinematics by usi...

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UKACC International Conference on control (control)

作者： Shuhui Wen Zhiyuan Ma Shuhuan Wen Yongsheng Zhao Jiantao Yao Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University QinHuangDao China

Direct and inverse kinematics are commonly implemented to determine main parameters affecting humanoid robots behavior and specify the reliable method to control motion and preserve stability. This paper presents a direct kinematics method for humanoid NAO model. The approach is analytical based on classic methods like Denavit-Hartenberg convention which are employed to derive forward kinematics equations. Firstly, it analyses the upper limb topology of NAO model and establishes the kinematics models. Secondly, the homogeneous transformation matrix of upper limb joints of the robot is derived in this paper. Finally, the simulations are given by using the Robotic Toolbox from MATlab software to test the derivation.

关键词： Robot kinematics Kinematics Joints Mathematical model MATlab Grasping

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An equalization algorithm based on constellation matched phase error for M-ary phase shift keying signals

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Journal of Computational Information Systems 2014年第3期10卷 895-902页

作者： Wang, Xinlin Liu, Bin Li, Haibin Liu, Shuang College of Information Science and Engineering Yanshan University Qinhuangdao 066004 China Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

The inter-symbol interference (ISI) and phase error caused by non-ideal character of channel can result in severe degradation of bit error rate performance in communication system. The existing equalization algorithm can effectively eliminate the ISI of M-ary phase shift keying signals (MPSK), but do not inhibit the phase error. A new equalization algorithm that accomplishes blind equalization and phase information recovery simultaneously is proposed for MPSK signals. In the algorithm, the cost function is weighted sum of two separate well-defined terms: one is identical to the constant modulus algorithm case to enhance the robust of the algorithm, and another is a constellation matched phase error (CMPE) term that is constructed in this paper. The CMPE term is used to cancel the phase error of the equalizer output. Simulation results demonstrate that the proposed algorithm is effective in removing ISI and correcting phase error at the same time. © 2014 Binary Information Press.

关键词： Phase shift keying

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A study on clutch multi-modal fuzzy control in AMT vehicle starting process

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Journal of Computational Information Systems 2013年第6期9卷 2121-2129页

作者： Zang, Huaiquan Li, Dongdong Key Lab of Industrial Computer Control Engineering of Hebei Province Institute of Electrical and Engineering Yanshan University Qinhuangdao 066004 China

In this paper, mathematical model of relationship between clutch engaging speed and engine output torque is firstly established to solve the problem of clutch engaging speed in AMT vehicle starting process, basing on analysis of the reduced kinetic model of clutch. Then multi-modal fuzzy control algorithm is adopted to precisely predict clutch engagement stage, and then driver's intension is considered to fuzzy control the clutch engaging speed. Finally, simulation modal is established. The simulation results show that, basing on the drivers intension and external environment, the control strategy proposed in this paper not only makes the vehicle start fast and stably, but also reduces slip friction work with the premise of comfort, which extends clutch working life and obtains better control performance in clutch starting process. Copyright © 2013 Binary Information Press.

关键词： Clutches

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Adaptive Backstepping control of Hydraulic Servo System with Input Saturation for Rolling Mill based on Multi-model Switching

Adaptive Backstepping Control of Hydraulic Servo System with...

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第三十二届中国控制会议

作者： LI Yehong FANG Yiming LI Jianxiong SHI Shengli Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University National Engineering Research Center for Equipment and Technology of Cold Strip Rolling

ISBN: (纸本)9781479900305

For the problems of parameters change abruptly and input saturation of the rolling mill hydraulic servo systems,an adaptive backstepping control method based on multi-model switching is presented in this ***,multiple models of the rolling mill hydraulic servo systems under different operating modes are ***,an auxiliary system is introduced to reduce the effects of input saturation,and the adaptive backstepping controllers are designed for all *** the help of common Lyapunov theory,the proposed method can guarantee stability of the multi-model switched system under arbitrary switching ***,the simulation results demonstrate the effectiveness of the proposed control method.

关键词： Hydraulic servo system Rolling mill Input saturation Multi-model switching Backstepping

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An improved method for MRAC system of indirectly designed

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2012 International Conference on Cybernetics and Informatics, ICCI 2012

作者： Han, Huishan Liu, Yan Cheng, Defang Gao, Xue Xingtai Polytechnic College Xingtai 054000 China Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

ISBN: (纸本)9781461438717

Based on Lyapunov stability theorem, a MRAC system was researched to solve that differential value of plant output is unknown. Meanwhile an improved design for MRAC system aimed on the factor of restricting convergence of system is given. The method not only solves the problem that makes the system cannot work well as a result of the adjustable parameters, but also improves the convergence of plant. The simulation graphs have shown that the plant can follow the output of the reference model quit well © 2013 Springer Science+Business Media.

关键词： MRAC system Lyapunov theory Convergence model reference adaptive control Converge design improvement adjustable parameter Lyapunov methods plants

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Parameter estimation and control for a neural mass model based on the unscented Kalman filter

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Physical Review E 2013年第4期88卷 042905-042905页

作者： Xian Liu Qing Gao Key Lab of Industrial Computer Control Engineering of Hebei Province Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 China

Recent progress in Kalman filters to estimate states and parameters in nonlinear systems has provided the possibility of applying such approaches to neural systems. We here apply the nonlinear method of unscented Kalman filters (UKFs) to observe states and estimate parameters in a neural mass model that can simulate distinct rhythms in electroencephalography (EEG) including dynamical evolution during epilepsy seizures. We demonstrate the efficiency of the UKF in estimating states and parameters. We also develop an UKF-based control strategy to modulate the dynamics of the neural mass model. In this strategy the UKF plays the role of observing states, and the control law is constructed via the estimated states. We demonstrate the feasibility of using such a strategy to suppress epileptiform spikes in the neural mass model.

关键词： PARAMETER estimation MATHEMATICAL models ELECTROENCEPHALOGRAPHY KALMAN filtering EPILEPSY NONLINEAR systems

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