Conference Program of WCICA 2012

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Conference Program WCICA 2012 Saturday, July 7, 2012 PL-4 8:30-9:30 Room 305 Plenary Lecture IV Chair: Chen, Ben M. National University of Singapore ◮ PL-4 8:30-9:30 Cooperative Output Regulation of Multi-Agent Systems Huang, Jie Chinese University of Hong Kong In this talk, we will describe the cooperative output regulation problem for multi-agent systems. The formulation of this problem generalizes the leader-following consensus problem in the sense that the problem simultaneously addresses asymptotic tracking and disturbance rejection, accounts for large model uncertainty, and accommodates a general leader system. Like the full information output regulation problem, this problem can be handled by the feedforward control approach and the internal model approach. These two approaches can also be used to handle other control problems of multi-agent systems such as formation, rendezvous, flocking. We will also briefly overview some recent results on this problem, and point out some possible future research topics on this problem. PL-5 9:50-11:50 Room 305 Plenary Lecture V Chair: Tarn, Tzyh-Jong Washington University, USA ◮ PL-5 9:50-11:50 Memristor: Past, Present, and Future Chua, Leon O. University of California at Berkeley, USA Although the memristor was first postulated axiomatically in 1971, and although a proof of principle had been published via a bulky circuit using operational amplifiers, it was the hp publication of a nano memristor in the 1 May 2008 issue of Nature that had triggered worldwide attention, with the number of publications on memristor applications exploding at an exponential rate. This 2-hour lecture presents the circuit and system theoretic concept of the memristor and shows why it had generated so much unprecedented interest in both academia and industry. Among other things, it will illustrate why memristors will replace flash memories and DRAMs in the near future, and why brains are made of memristors. It will also show how action potentials (spikes) from the Hodgkin-Huxley axon model are generated by the sub-critical Hopf bifurcation nonlinear dynamics of the sodium and potassium memristor Hodgkin-Huxley neuron model operating near the edge of chaos. SaA01 13:30–15:30 Room 203A Networked Control Chair: Wang, Wei Co-Chair: Zhai, Feng Information school, Renmin Univ. of China China Electric Power Research Inst. ◮ SaA01-1 13:30–13:50 The Optimization Method for a Kind of Uncertain Networked Systems Based on the Stripping Principle and Optimal Control, pp.964–969 Wang, Wei Information school, Renmin Univ. of China In this paper, based on using the stripping principle and optimal control, we consider the method of optimization for a kind of uncertain networked systems which are composed of some heteromorphic subsystems. The method can be summarized as follows. Facing the complex structure of networked control system and the unavoidable uncertainties and/or disturbances, we use the integral feedback with a variable gain for each of the subsystems to remove or eliminate the interconnected parts, uncertainties and disturbances. So we translate the control problem of networked systems into that of decentralized control. And then we use optimal control for the remainder parts of the subsystems respectively. Then the fastness of the networked systems can be improved. The theoretical analysis and simulation results are provided to indicate the effectiveness of the proposed approach. ◮ SaA01-2 13:50–14:10 Uplink Dead Zone Analysis for Co-Channel Two-Tier Femtocell Network, pp.991–995 Han, Qiaoni Guan, Xinping Ma, Kai Liu, Zhixin Yanshan Univ. Yanshan Univ. Yanshan Univ. Inst. of Electrical Engineering,Yanshan Univ. This paper is concerned with the dead zone problem of uplink communication in two-tier femtocell network. In the uplink communication, the interference generated by a macrocell user at the edge of the macrocell base station (MBS) coverage area may cause the signal-tointerference-plus-noise ratio (SINR) received at the nearby femtocell base station (FBS) below the requirement, and the region in which the nearby FBS can not meet its SINR requirement is called a Femtocell Dead Zone (FDZ). In order to guarantee the quality-of-service (QoS) of macrocell users and femtocell users, the transmission power of femtocell users should be controlled properly. In this work, the uplink interference scenario that exists between a femtocell and a macrocell is modeled and discussed in detail, and then, the fundamental limit of the achievable SINR at MBS and FBS is shown. Numerical results present a straightforward way to establish the FDZ and show the impact of the uplink interference from macrocell user on the QoS of the nearby femtocell user. ◮ SaA01-3 14:10–14:30 Security Protection Technology of Intelligent Electricity Selling Terminal, pp.1005–1009 Zhai, Feng Zhao, Bing Cen, Wei China Electric Power Research Inst. China Electric Power Research Inst. China Electric Power Research Inst. In order to solve the problem of power user’s difficulty for powerpurchase, intelligent electricity selling terminal is widely used in power selling system. Data’s secure transmission and storage is the bases for intelligent electricity selling terminal to implement its function, ensuring the security of data has become the key technologies to be resolved for intelligent electricity selling terminal. Based on the SIM1 data encryption technology, PKI digital certification authentication technology and SSL communication technology, this paper has proposed the realization mode of the data’s safety protection technology between intelligent electricity selling terminal and power selling master station system. ◮ SaA01-4 14:30–14:50 Improved delay-dependent stability criteria for networked control systems, pp.892–897 Song, Yan Wang, Jingcheng electronic & electric engineering electronic & electric engineering This paper is concerned with robust H∞control of uncertain networked control systems with interval time-varying delay and packet dropout. For less conservative transformation, we propose a new integral inequality by dividing time interval into two subintervals and defining an appropriate scalar instead of introducing free weighting matrix. Based on this integral inequality, a new delay-dependent stability criteria for the systems are obtained by solving a convex domain. Moreover, we may obtain the feasible solutions by solving a minimization problem in terms of linear matrix inequalities. Finally numerical examples are used to illustrate the effectiveness and validity of the proposed methods. ◮ SaA01-5 14:50–15:10 Stability Analysis and Control of Bifurcation in a TCP Fluid Flow Model of Wireless Networks, pp.1026–1030 Liu, Feng Wang, Hua O. Guan, Zhi-Hong China Univ. of GeoSci. Boston Univ. Huazhong Univ. of Sci. & Tech. In this paper the bifurcation behavior of a TCP fluid flow model for Internet congestion control in Wireless Networks is investigated. These bifurcation behaviors may cause heavy oscillation of average queue length and induce network instability. An impulsive control method was proposed for controlling bifurcations in the Internet congestion control 148
WCICA 2012 Book of Abstracts: Saturday Sessions system. Simulation results show that the nonlinear behavior of the system can be controlled by this method. ◮ SaA01-6 15:10–15:30 Stabilization of Wireless Networked Control Systems with Packet Loss and Impulse Disturbance, pp.1031–1036 QU, Feng-Lin Huazhong Univ. of Sci. & Tech. Guan, Zhi-Hong Huazhong Univ. of Sci. & Tech. Yuan, Fushun Anyang Normal Univ. Zhan, Xisheng Huazhong Univ. of Sci. & Tech./Hubei Normal Univ. This paper considers the stabilization problem for the wireless networked control system(WNCS) with impulse disturbance in discretetime domain. The packet loss is modeled according to an independent and identically distributed(i.i.d) Bernoulli process. And the control input becomes zero when the data are lost. The necessary and sufficient conditions on the existence of stabilizing controllers are established. An iterative linear matrix inequality approach is employed to calculate the state-feedback gains. A numerical example is provided to illustrate the effectiveness of the theoretical results. SaA02 13:30–15:30 Room 203B Robust Control (I) Chair: Wang, Yijing School of Electrical Engineering & Automation Co-Chair: Sun, Weiwei Qufu Normal Univ. ◮ SaA02-1 13:30–13:50 Robust H∞control of linear systems with intervalnon-differentiable time-varying delays, pp.1507–1512 Emharuethai, Chanikan Niamsup, Piyapong Chiang Mai Univ. Chiang Mai Univ. In this paper, robust H∞control for a class of linear systems with timevarying delay is studied. The time delay is a continuous function belonging to a given interval, which means that the lower and upper bounds for the timevarying delay are available, but the delay function is not necessarily differentiable. Based on Lyapunov-Krasovskii theory combined with Leibniz-Newton’s formula, new delay-dependent sufficient conditions for the exponential stabilization and a prescribed H∞performance level of the closed-loop system for all admissible uncertainties, are established in terms of LMIs. Numerical examples are given to illustrate the effectiveness of the theoretical results. ◮ SaA02-2 13:50–14:10 Robust stability for uncertain switched systems with interval timevarying delay, pp.1305–1310 La-inchua, Teerapong Niamsup, Piyapong Chiang Mai Univ. Chiang Mai Univ. This paper addresses the design of switching rule for robust stability of a class of uncertain switched system with delay. The system to be considered is autonomous and the state delay is time-varying. Using Lyapunov functional approach, restriction on the derivative of time-delay function is not required to design switching rule for the robust stability of switched systems with time-varying delays. The delay-dependent stability conditions are presented in terms of the solution of LMIs which can be solved by various available algorithms. ◮ SaA02-3 14:10–14:30 Robust Stability Analysis of Hamiltonian Systems with Time-Varying Delays and Uncertainties, pp.1832–1837 Sun, Weiwei Wang, Pan Qufu Normal Univ. Qufu Normal Univ. This paper investigates the robust stability for time-delay Hamiltonian systems with polytypic uncertainties. Both delay-independent and delay-dependent criteria are established based on the dissipative structural properties of the Hamiltonian systems and the Lyapunov- Krasovskii (L-K) functional approach. All the proposed stability conditions are expressed in terms of Linear Matrix Inequality (LMI). Numerical examples demonstrate the validity of the new results proposed in this paper. ◮ SaA02-4 14:30–14:50 Robust Finite-Time Stochastic Stability Analysis and Control Synthesis of Uncertain Discrete-Time Markovian Jump Linear Systems, pp.1925– 1929 Zuo, Zhiqiang Li, Hongchao Wang, Yijing Liu, Yi Tianjin Univ. Tianjin Univ. School of Electrical Engineering & Automation Tianjin Univ. In this paper, the problems of finite-time stochastic stability analysis and controller synthesis of uncertain discrete-time Markovian jump linear systems are investigated. The uncertainties considered are that partial elements of the of transition probabilities are not available. By introducing the concept of finite-time stochastic stability for Markovian jump systems, a sufficient condition is proposed to guarantee that the state of the system does not exceed a certain bound in mean square sense during a fixed time interval. It is shown that the system which is not mean square stable may be finite-time stochastic stable and vice versa. For the controller synthesis case, mode-dependent state feedback controller can be developed based on the above stability analysis result. Some numerical examples are presented to illustrate the effectiveness of the proposed methods. ◮ SaA02-5 14:50–15:10 Robust Exponential Delay-Dependent Stability Criteria for Neutral Systems with Constant delay, pp.1698–1703 Warakorn, Sudsanguan Rojsiraphisal, Thaned Burapha Univ. Faculty of Sci., Chiang Mai Univ. In this paper, exponential stability criteria of linear neutral systems with/ without uncertainties are investigated. By applying a change of variable, the Leibniz-Newton formula, integral inequalities and Lyapunov- Krasovskii functionals without adding free matrices, improved exponential stability-delay dependent criteria of the systems are obtained in the form of linear matrix inequality (LMI). At the end, three numerical examples are given to indicate that the results presented in this research are effective and better than some criteria of previous works. ◮ SaA02-6 15:10–15:30 Robust H ∞ Fuzzy Control for Nonlinear Discrete-Time Systems by Nonquadratic Lyapunov Function Approach, pp.1710–1715 Horng, Wen-Ren Fang, Chun-Hsiung Kaohsiung Univ of Applied Sci. he serves as the President of National Kaohsiung Univ. of Applied Sci. In this paper, a new relaxed condition is proposed to deal with H-inf control for nonlinear discrete time systems that are represented by T- S fuzzy model. The main results are derived based on nonquadratic Lyapunov function and employed non-PDC controller. The new relaxed design conditions are expressed in terms of linear matrix inequalities, which can be efficiently solved by software. Finally, illustrative examples are given to show the performance of our approach. SaA03 13:30–15:30 Room 203C Adaptive Control and Learning Control Chair: Guo, Jing Co-Chair: Wei, Airong Beijing Inst. of Aerospace Testing Tech. shandong uniersity ◮ SaA03-1 13:30–13:50 Adaptive Control for Clutch Engagement on Starting up of Vehicle, pp.1230–1234 Dong, Yuehong Jiao, Xiaohong Chen, Dongzhi Yanshan Univ. Yanshan Univ. Yanshan Univ. Control problem is investigated for dry clutch engagement process during a standing start in AMT vehicles. Based on the control-oriented simplified driveline dynamic model under consideration of parametric uncertainties of the driveline due to the mechanical wear and tear, the e- lastic deformation of shaft and so on, an adaptive tracking control strategy is examined paying particular attention to the engagement comfort while not deteriorating the slipping time by using the crankshaft speed and the clutch disk speed as state variables and the engine torque and the clutch torque as control variables. The resulting analytically derived adaptive controller guarantees the fast smooth engagement of 149
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WCICA 2012 The 10 th World Congress
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