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2012 9th IEEE International Conference on Networking, Sensing and control, ICNSC 2012

作者： Zou, Juan Wei, Yong Wu, Weimin State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

ISBN: (纸本)9781467303880

An emergency control system for shipping is an indispensable part of the modern maritime operation system. Petri nets are useful for describing and studying information processing systems that are characterized as being concurrent, distributed parallel and asynchronous. In this paper, a generalized stochastic Petri net with finite capacity and inhibitor arc is exploited to model the emergency control system for shipping. The obtained model is analyzed using the software of PIPE. The analyzed results on modeling time and resource performance show that the obtained model is able to describe well the real physics system and provide some suggestion on improving the performance of the emergency control system for shipping. © 2012 IEEE.

关键词： Stochastic systems

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Hysteretic optimization for the 3D protein folding based on the lattice model

Hysteretic optimization for the 3D protein folding based on ...

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2012 International Applied Mechanics, MechatronicsAutomation and System Simulation Meeting, AMMASS 2012

作者： Xiong, Ru Lu, Yong-Zai Zhou, Xuanhao Xu, Weihua State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

Due to the critical positions of the studies of protein folding in medical and biological systems, the intelligent computation has been playing more and more important role in modeling and optimization for protein folding systems. This paper presents the applications of hysteretic optimization (HO) being a recent proposed physical principle inspired intelligent optimization solution for a 3D protein folding problem with lattice model. According to the characteristics of 3D protein folding model, the four key ingredients of HO approach, namely dynamics, distance, reference states and point of avalanche, are well defined. A proposed modified HO algorithm is successfully implemented for studies on 3D protein folding problems. Furthermore, the benchmark based numerous simulation results show the efficiency of the proposed HO method, and the relationship between the HO parameter setting and the resulting performance. © (2012) Trans Tech Publications, Switzerland.

关键词： Protein folding

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An algorithm for detection of malicious messages on CAN buses

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2012 National Conference on Information technology and Computer Science, CITCS 2012

作者： Ling, Congli Feng, Dongqin State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

ISBN: (纸本)9789491216381

control systems are encountering increasing security threats;as one of the common systems, CAN control system is very facile to be attacked. Aiming at the improvement of CAN control system security, an algorithm for detection of malicious CAN messages is given, and it has been implemented in the CANoe simulation environment. The result shows that this algorithm has powerful detection function and valuable practice signification. © 2012. The authors - Published by Atlantis Press.

关键词： Signal detection

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A Robust Strictly Passive Output—Error Identifier for Continuous—Time systems

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IFAC Proceedings Volumes 2013年第11期46卷 170-175页

作者： Lei Wang Romeo Ortega Hongye Su Xiangbin Liu Yang Zhu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 P.R.China Laboratoire des Signaux et Systèmes L2S CNRS UMR 8506 Supélec Univ Paris Sud-P11 91192 Gif sur Yvette France Beijing Jiaotong University Beijing 100044 China

This paper shows that the adaptive output error identifier for linear time–invariant continuous–time systems proposed by (Betser and Zeheb [1995]) is robust vis–à–vis measurement noise. More precisely, it is proven that the map from the noise to the estimation error is –stable—provided a tuning parameter is chosen sufficiently large. A procedure to determine the required minimal value of this parameter is also given. If the noise is exponentially vanishing, asymptotic convergence to zero of the prediction error is achieved. Instrument for the establishment of the results is a suitable decomposition of the error system equations that allows us to strengthen—to strict —the well-known passivity property of the identifier. The estimator does not require fast adaptation, a dead-zone, nor the knowledge of an upperbound on the noise magnitude, which is an essential requirement to prove stability of standard output error identifiers. To robustify the estimator with respect to non–square integrable (but bounded) noises a prediction error-dependent leakage term is added in the integral adaptation. A simulated example, which is unstable for the equation error identifier and the output error identifier of (Betser and Zeheb [1995]), is used to illustrate the noise insensitivity property of the new scheme.

关键词： Output-error identification identification of continuous-time systems passivity

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A Review for Model Plant Mismatch Measures in Process Monitoring

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Chinese Journal of Chemical Engineering 2012年第6期20卷 1039-1046页

作者：王洪谢磊宋执环 State Key Laboratory of Industrial Control Technology Institute of Industrial Process ControlZhejiang University Institute of Cyber-Systems and Control Zhejiang University

Model is usually necessary for the design of a control loop. Due to simplification and unknown dynamics, model plant mismatch is inevitable in the control loop. In process monitoring, detection of mismatch and evaluation of its influences are demanded. In this paper several mismatch measures are presented based on different model descriptions. They are categorized into different groups from different perspectives and their potential in detection and diagnosis is evaluated. Two case studies on mixing process and distillation process demonstrate the efficacy of the framework of mismatch monitoring.

关键词： model plant mismatch process monitoring control loop behavior

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Improved LQG benchmark for control performance assessment on ARMAX model process

Improved LQG benchmark for control performance assessment on...

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8th International Symposium on Advanced control of Chemical Processes, ADCHEM 2012

作者： Liu, Zhe Su, Hong-Ye Xie, Lei Gu, Yong State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 Zhejiang China

ISBN: (纸本)9783902823052

control performance assessment for MPC systems has attracted a lot of interest in recent years. Compared with the typical MVC benchmark, the LQG benchmark gives a pragmatic assessment result. Based on the traditional LQG benchmark, the equigrid approach can improve the regression performance. In addition to the numerical algorithm, the recursive algorithm and the analytical algorithm were introduced to analyze the essential relationship in the LQG benchmark, which can save the computing cost and improve the regression effect. Based on the ARMAX model, the detailed procedures for these algorithms were discussed. In the simulation to a SISO process and a MIMO process, the different types of LQG benchmarks were calculated. © 2012 IFAC.

关键词： Benchmarking

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High temperature proton exchange membrane fuel cell hybrid power system monitoring platform designing

High temperature proton exchange membrane fuel cell hybrid p...

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International Conference on Automatic control and Artificial Intelligence, ACAI 2012

作者： Su, Hongye Zhang, Bo Cao, Zhixing Li, Xiuliang Chen, Xuelan State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou Zhejiang Province 310027 China

ISBN: (纸本)9781849195379

The design of 5kw high temperature proton exchange membrane fuel cell (HTPEMFC) hybrid power system monitoring platform is presented in this paper. The purpose of the system is to overcome the problems of low temperature proton exchange membrane fuel cell (LTPEMFC), such as poor water management and requirement of high-purity hydrogen. The present computerized real-time monitoring system is based on NI's PXIe hardware system and Labview software. The platform has two working modes - test mode and simulation mode. In the test mode, it provides the conditions for studying the problems of fuel cell hybrid power system, such as system performance, modelling and optimization, by completely monitoring all the working parameters in real-time. And in the simulation mode, besides the problems mentioned above, those with feeding control under changing loads, stability of output power and optimization of energy efficiency, can also be studied with multi-energy management system.

关键词： Monitoring

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Multiple model predictive control for oxygen starvation prevention of fuel cell system

Multiple model predictive control for oxygen starvation prev...

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International Conference on Automatic control and Artificial Intelligence, ACAI 2012

作者： Chen, Xuelan Li, Xiuliang Su, Hongye Cao, Zhixing Zhang, Bo State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou Zhejiang Province 310027 China

ISBN: (纸本)9781849195379

The purpose of this work is to prevent oxygen starvation of fuel cell system with the compressor surge and choke constraints considered. It has been already known that the compressor inertia causes the oxygen excess ratio to drop rapidly when the current drawn out of the fuel cell steps up dramatically. Thus we introduce a load actuator model to extract the load current out of the fuel cell as a performance variable. Then we are able to regulate the input of load actuator not only to smooth the transitions of load current to prevent the oxygen starvation, but also to track the desired current of fuel cell. Moreover, air supply system of fuel cell has strong nonlinear behaviors while working in a wide range. Thus a multiple multivariable model predictive controller has been introduced based on linearized models obtained from the fuel cell's nonlinear model linearized at operation points. The simulation results have demonstrated that the proposed control strategy is effective when applied to the fuel cell's nonlinear system.

关键词： Model predictive control

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Stability analysis for discrete linear systems with state saturation by a saturation-dependent Lyapunov functional

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控制理论与应用（英文版） 2012年第4期10卷 539-542页

作者： Xiaofu JI Mingwei REN Hongye SU Jinfeng GAO School of Electrical and Information Engineering Jiangsu University National Key Laboratory of Industrial Control Technology Institute of Cyber-systems and ControlZhejiang University Institute of Automation Zhejiang Sci-Tech University

This paper concerns the stability analysis problem of discrete linear systems with state saturation using a saturation-dependent Lyapunov functional. We introduce a free matrix characterized by the sum of the absolute value of each elements for each row less than 1, which makes the state with saturation constraint reside in a convex polyhedron. A saturation-dependent Lyapunov functional is then designed to obtain a sufficient condition for such systems to be globally asymptotically stable. Based on this stability criterion, the state feedback control law synthesis problem is also studied. The obtained results are formulated in terms of bilinear matrix inequalities that can be solved by the presented iterative linear matrix ineoualitv algorithm. Two numerical examoles are used to demonstrate the effectiveness of the nronosed method_

关键词： Discrete linear systems state saturation Saturation-dependent Iterative linear matrix inequality

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Computational linear dynamics for sensor deployments toward leakage detection in offshore pipelines

Computational linear dynamics for sensor deployments toward ...

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31st Chinese control Conference, CCC 2012

作者： Tehuan, Chen Chao, Xu Weihua, Xu Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China

ISBN: (纸本)9789881563811

In this work, we discuss the leakage detection problem arising in offshore pipeline transport which is much more challenging than that in ground fluid transport systems due to the lack of measurements along the pipelines. We consider the linear dynamics using the transmission line model, then we compare the frequency responses of the transfer functions obtained via both finite difference method and PDE Laplace transform. The simulation result shows the effectiveness of the finite dimensional models which can approximate the original linearized model accurately in low frequencies. Due to the scarcity of sensors in the SCADA (the Supervisory control And Data Acquisition) systems of offshore pipelines, we propose a novel integrated drifting sensor solution for this type of detection problem and make a brief introduction of the data assimilation framework. © 2012 Chinese Assoc of Automati.

关键词： Finite difference method

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