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

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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Fuzzy control of clutch engagement with engine running at local constant speed

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Journal of Computational Information Systems 2013年第9期9卷 3423-3430页

作者： Zang, Huaiquan Fan, Jinlong Key Lab. of Industrial Computer Control Engineering of Heibei Province Yanshan University Qinhuangdao 066004 China

Aiming at the starting process of automated mechanical transmission, control algorithm of engaging process of clutch is studied. Firstly, the simplified dynamic model of clutch engagement is established. Secondly, the starting process of automobile is analyzed and the relationship between clutch engagement speed and jerk is obtained. Finally, fuzzy control algorithm of clutch engagement with engine running at local constant speed is proposed by combining engine constant speed control with fuzzy control of engaging process of clutch. Simulation results show that the algorithm can not only embody the driver's operation intention, but also ensure clutch engagement quickly and smoothly. © 2013 by Binary Information Press.

关键词： Clutches

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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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Fuzzy adaptive backstepping sliding mode control for the hydraulic gap nonlinear system

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Journal of Computational Information Systems 2013年第3期9卷 1113-1120页

作者： Wu, Zhongqiang Tang, Yachao Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

In this paper, a fuzzy adaptive backstepping sliding mode controller is presented for the hydraulic gap nonlinear system with uncertain parameters and load disturbances. Fuzzy adaptive systems are employed to approximate the uncertain parameters and load disturbances, which eliminates the impacts of uncertain parameters and load disturbances. According to the characteristics of the hydraulic gap nonlinear system, the appropriate Lyapunov functions are selected to reduce the steps of the backstepping design and an effective solution is given to the problem of the explosion of calculation of the backstepping design process of high-order systems. The sliding mode control method is introduced in the final step of backstepping design to further improve the robustness of the system. In the controller design, the adaptive laws of uncertain parameters are given and the convergence of the system tracking error is proved. The simulation results show that the controller can achieve fast, accurate and stable tracking of the specified location. Copyright © 2013 Binary Information Press.

关键词： Backstepping

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Rapid ILC with variable index gain for manipulator trajectory tracking

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Journal of Computational Information Systems 2013年第12期9卷 4739-4746页

作者： Wang, Hongrui Wang, Na Wang, Yueling Wang, Chao Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

A non-causal iterative learning control (ILC) with variable index gain is presented to solve the trajectory tracking problem of rigid robot manipulator with non-zero initial error. This scheme eliminates the restriction that the initial state must be fixed or be consistent with the desired state. Compared with fixed learning gain, ILC with variable index gain not only avoids choosing gain aimlessly but also significantly enhances the convergent speed. In this paper, the proposed non-causal algorithm uses error information of future time in previous iteration, then the controller can offset future disturbances in advance. From the perspective of execution, the proposed scheme is easy to implement. Moreover, we analyze the convergence of the new algorithm. Finally, applying the proposed algorithm in manipulator trajectory tracking system, we present simulation results to illustrate the effectiveness of the control scheme. © 2013 by Binary Information Press.

关键词： Iterative methods

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Tension control study in the finishing mill of aluminum hot rolling mills based on PSO+CMAC

Tension control study in the finishing mill of aluminum hot ...

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2013 3rd International Conference on Advanced Measurement and Test, AMT 2013

作者： Yang, Jing-Ming Chen, Li Wan-Hong, Wang Che, Hai-Jun Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China National Engineering Research Center for Equipment and Technology of C.S.R Yanshan University Qinhuangdao 066004 China Henan Mingtai Al. Industrial Co. Ltd of Gongyi Henan Province 451200 China

ISBN: (纸本)9783037857168

Aimed at decreasing the tension variation during transforming process of "1+4" aluminum hot rolling mills unit in one factory of Henan, we analyzed the factors affecting tension variation and improved the tension formula of hot rolling mills process considering the influence of tension on forward slip value. The tension forming process of hot rolling mills from stand 1 to stand 4 is simulated, and the tension structure diagrams of the four-stands are constructed. Due to nonlinear characteristics of the aluminum hot rolling mills tension system, conventional PID controller could not meet the requirement of the system. So we proposed the mixed control of Cerebellar Model Articulation controller (CMAC) coupled with PID to solve the problem of online parameters control and we used Particle Swarm Optimization (PSO) algorithm to optimize PID controller parameters. By simulation, it could be found that the using of PSO+CMAC significantly reduced surplus adjustment and transition time, and strip tension coupling degree among stands was also reduced. © (2013) Trans Tech Publications, Switzerland.

关键词： Aluminum

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A fuzzy-PI hybrid controller based on a disturbance observer

A fuzzy-PI hybrid controller based on a disturbance observer

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International Conference on Natural Computation (ICNC)

作者： Manjun Cai Yue Wang Key lab of industrial computer control engineering in Hebei province Yanshan University Qinhuangdao China

This paper proposes a fuzzy PI hybrid speed controller for a PMSLM (Permanent Magnet Synchronous Linear Motor), which is based on a friction disturbance observer. It can improve the problems caused by the friction disturbance and the system parameters perturbation. Also the problem of the blind area for fuzzy control is eventually eliminated, because of the introduction of the PI control. Finally, through the simulation test and comparative analysis with the traditional PID control method, the validity and rationality of the control scheme is illustrated.

关键词： Observers Mathematical model Fuzzy control PD control Steady-state Equations Friction

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