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

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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Analytical modeling of link duration for vehicular ad hoc networks in urban environment

Analytical modeling of link duration for vehicular ad hoc ne...

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10th ACM International Workshop on Vehicular Inter-Networking, Systems, and Applications, VANET 2013

作者： Hu, Miao Zhong, Zhangdui Zhu, Haoqing Ni, Minming Chang, Chih-Yung State Key Lab. of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China Dept. of Computer Science and Information Engineering Tamkang University Taipei Taiwan

ISBN: (纸本)9781450320733

Link duration determines the performance of many vehicular applications, especially for urban vehicular wireless communication networks. However, the theoretical analysis on link properties is always complicated, since parameters that should be considered include the inter-vehicle distance, the vehicle speed, the turning ratios in the intersection, the influence of traffic lights in the intersections, and the signal decay caused by the roadside buildings etc. To reduce the analytical complexity, most of the previous works proposed preliminary analysis on link duration property by considering some parameters. Even though some works considered all parameters, their assumptions on the parameters setting were somewhat ideal. For example, the events of meeting traffic lights for two consecutive vehicles in a communication route path were always assumed independent with each other, which is different from the actual situations. This paper proposes a discrete Markov process-based analytical model on link duration by considering a relatively complete set of parameters, including the influence of the inter-vehicle distance, vehicle speed, turning ratios in the intersection, traffic lights in the intersection, and the non-line-of-sight transmission for the intersection. Especially, the theoretical study on the link duration is based on a more realistic traffic lights scenario description model. Finally, simulations are carried to verify the accuracy of our analytical work.

关键词： Analytical models

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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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High-dimensional chaotic system and its circuit simulation

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Telkomnika - Indonesian Journal of Electrical engineering 2013年第8期11卷 4530-4538页

作者： Liu, Jianming Hebei Key Lab of Industrial Computer Control Engineering Yanshan University Qinhuangdao China

The chaotic system plays an important role in electronic and electrical equipment, computer cryptography, computer communication and so on. In this paper, we established three new six-dimensional complex chaotic systems and one new ten-dimensional complex chaotic system. The regularity to generate high-dimensional chaotic system is also found by overlaying a series of low-dimensional chaotic systems with Duffing chaotic system. The circiuts of the new high-dimensional complex chaotic system are designed. The simulation experiments of the high-dimensional complex chaotic circuits are tested. The results of theoretical analysis and experiment show that new high-dimensional complex chaotic systems and their circiuts have the hyperchaotic characteristics.2013 Universitas Ahmad Dahlan.

关键词： Chaotic systems

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A new regularity to generate high-dimensional hyperchaotic system

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Telkomnika - Indonesian Journal of Electrical engineering 2013年第8期11卷 4594-4601页

作者： Liu, Jianming Hebei Key Lab of Industrial Computer Control Engineering Yanshan University Qinhuangdao China

The chaotic system plays an important role in information communication, electrical equipment, computer cryptography and so on. In this paper, four new high-dimensional complex hyperchaotic systems are found. A new overlaying regularity to generate a new high-dimensional complex hyperchaotic system is found by overlaying a series of low-dimensional chaotic system with the Duffing chaotic system. The regularity to generate high-dimensional complex hyperchaotic system is analyzed. The features of chase space maps and Lyapunov exponents' maps are analyzed. The results of theoretical analysis and experiment show that new systems having strong chaotic features. © 2013 Universitas Ahmad Dahlan.

关键词： Chaotic systems

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Tumor gene expressive data classification based on locally linear representation Fisher criterion

Tumor gene expressive data classification based on locally l...

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9th International Conference on Intelligent Computing, ICIC 2013

作者： Li, Bo Tian, Bei-Bei Liu, Jin School of Computer Science and Technology Wuhan University of Science and Technology 430081 Wuhan China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan China State Key Lab. of Software Engineering Wuhan China

ISBN: (纸本)9783642394812

In this paper, a discriminant manifold learning method based on Locally Linear Embedding (LLE), which is named Locally Linear Representation Fisher Criterion (LLRFC), is proposed for the classification of tumor gene expressive data. In the proposed LLRFC, an inter-class graph and intra-class graph is constructed based on the class information of tumor gene expressive data, where the weights between nodes in both graph are optimized using locally linear representation trick. Moreover, a Fisher criterion is modeled to maximize the inter-class scatter and minimize the intra-class scatter simultaneously. Experiments on some benchmark tumor gene expressive data validate its efficiency. © 2013 Springer-Verlag.

关键词： Genes

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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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Multiple Relay Selection Scheme Based on Artificial Bee Colony Algorithm

Multiple Relay Selection Scheme Based on Artificial Bee Colo...

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International Conference on Instrumentation, Measurement, computer, Communication and control (IMCCC)

作者： Juan Wang Xinbin Li Kai Ma Key Lab of Industrial Computer Control Engineering Hebei Province Yanshan University Qinhuangdao China

ISBN: (纸本)9781479913930

Relay selection (RS) and power control are two essential parts in cooperative cognitive relay network. RS is equal to power control in the condition that a relay cooperates with its full power or doesn't cooperate at all. So the optimal signal-to noise ratio (SNR) value is described as a 0-1 nonlinear programming integer problem (NLIP). In this paper, a multiple relay selection (MRS) scheme based on artificial bee colony algorithm (ABC) is proposed that can fully obtain optimal SNR value. Simulations show the performance of MRS scheme by ABC algorithm is better than that of exhaustive search, single RS scheme and other sub optimal MRS schemes.

关键词： Signal to noise ratio Cognitive radio Power control Relay networks (telecommunications)

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Global dynamic sliding mode control of PMSM speed servo systems base on extended state observer

Global dynamic sliding mode control of PMSM speed servo syst...

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Chinese control Conference (CCC)

作者： Yangyang Wu Yiming Fang Le Liu Yongchao Zhang Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

Base on the the high performance requirements of permanent magnet synchronous motor(PMSM) speed servo system for non-sinusoidal oscillation control system of continuous casting mold, a global dynamic sliding mode(GDSM) control method is proposed, The reaching law of the sliding mode is designed by exponential fast terminal sliding mode(EFTSM) method and the controllers could effectively diminish chattering by designing the first derivative of control output which contains discontinuous function of sliding mode control; Considers the time variation of parameters perturbation and load disturbance of PMSM, a extended state observer (ESO) is constructed to observe the dynamic observation of total system perturbation and conduct feedforward compensation; theoretical analysis shows that the closed-loop system is global bounded stability; The simulated results show that the static and dynamic performance of the PMSM speed servo control system can be significantly improved by using the proposed method.

关键词： Electronic mail Sliding mode control Servomotors Observers Zirconium Digital control Educational institutions

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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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