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Journal of Systems Engineering and Electronics 2010年第4期21卷 688-697页

作者： P.Balasubramaniam G.Nagamani Department of Mathematics Gandhigram Rural University

The problem of passivity analysis is investigated for uncertain stochastic neural networks with discrete interval and distributed time-varying *** parameter uncertainties are assumed to be norm bounded and the delay is assumed to be time-varying and belongs to a given interval,which means that the lower and upper bounds of interval time-varying delays are *** constructing proper Lyapunov-Krasovskii functional and employing a combination of the free-weighting matrix method and stochastic analysis technique,new delay-dependent passivity conditions are derived in terms of linear matrix inequalities（LMIs）.Finally,numerical examples are given to show the less conservatism of the proposed conditions.

关键词： linear matrix inequality(LMI) stochastic neural network passivity interval time-varying delay Lyapunov method.

passivity breakdown on 436 ferritic stainless steel in solutions containing chloride

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Journal of Materials Science & Technology 2019年第4期35卷 637-643页

作者： Jiaming Wang Shengsheng Qian Yanhui Li Digby D.Macdonald Yiming Jiang Jin Li Department of Materials Science Fudan University Department of Materials Science and Engineering University of California at Berkeley Key Laboratory of Thermo-Fluid Science and Engineering of MOE Xi'an Jiaotong University

passivity breakdown on 436 ferritic stainless steel(FSS) has been investigated in solutions containing different concentrations of chloride at 25?C and interpreted in terms of the point defect model(PDM). The measured near-normal distributions of passivity breakdown potentials for 436 FSS under experimental conditions are in good agreement with the calculated results according to the PDM. The linear dependence of breakdown potential on the square root of potential scanning rate, which was described by the PDM,provides the estimation of the critical concentration of condensed vacancies at the metal/film interface,which leads to the passivity breakdown. This value is in good agreement with that calculated from the microstructure properties of the alloy substrate and the barrier layer of the passive film. This study demonstrates the validity of the PDM in describing the passivity breakdown on 436 FSS in NaCl solutions.

关键词： 436 ferrite stainless steel passivity breakdown Point defect model Chloride ions

Extensions in adaptive model tracking with mitigated passivity conditions

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Chinese Journal of Aeronautics 2013年第1期26卷 136-150页

作者： Itzhak BARKANA BARKANA Consulting 11/3 Hashomer St. Ramat Hasharon 47209 Israel

Feasibility of nonlinear and adaptive control methodologies in multivariable linear timeinvariant systems with state space realization {A, B, C} has apparently been limited by the standard strict passivity （or positive realness） conditions that imply that the product CB must be positive definite symmetric. More recently the symmetry condition has been mitigated, requiring instead that the not necessarily symmetric matrix CB be diagonalizable and with positive real eigenvalues. However, although the mitigated conditions are useful in proving pure stabilizability with Adaptive Controllers, the Model Tracking question has remained open and counterexamples seem to demonstrate total divergence of standard model reference adaptive controllers when the regular passivity conditions are not fully satisfied. Therefore, this paper further extends the previous results, showing that the new passivity conditions do guarantee stability with adaptive model tracking. Examples show how the new conditions solve the case of flexible structures with unknown parameters when perfect collocation is not possible. Also, the so-called counterexamples become simple, well-behaved, examples.

关键词： Almost strict passivity Control systems passivity Simple adaptive control Stability

passivity Analysis of Multi-Weighted Complex Dynamical Networks with Fixed and Switching Topologies 36

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Passivity Analysis of Multi-Weighted Complex Dynamical Netwo...

passivity-based Stabilization for a Strict-feedback Nonlinear System under a Proper State-dependent Switching 36

第36届中国控制会议

作者： ZHANG Xiao-Xiao WANG Jin-Liang HUANG Yan-Li REN Shun-Yan School of Computer Science and Software Engineering Tianjin Polytechnic University School of Mechanical Engineering Tianjin Polytechnic University

ISBN: (纸本)9781538629185

In this paper,we respectively discuss passivity of multi-weighted complex dynamical networks with fixed and switching ***,several passivity criteria for the complex dynamical network with fixed topology and multi-weights are established by employing Lyapunov functional approach and inequality ***,similar methods are used to derive some sufficient conditions for passivity of multi-weighted complex dynamical networks with switching ***,a numerical example with simulation results is given to show the correctness of the obtained passivity criteria.

关键词： Complex Dynamical Networks Multi-Weights passivity Fixed Topology Switching Topology

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Passivity-based Stabilization for a Strict-feedback Nonlinea...

Improved results on passivity analysis of discrete-time stochastic neural networks with time-varying delay

第36届中国控制会议

作者： Yaowei Sun Jun Zhao State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University) College of Information Science and EngineeringNortheastern University College of Mathematics and Statistics Zhoukou Normal University

ISBN: (纸本)9781538629185

In this paper, the passivity-based stabilization problem of a strict-feedback nonlinear system under a proper statedependent switching law is investigated. Here, the feedback passification problem of each subsystem does not need to be solvable. First, by using the recursive backstepping technique, a sufficient condition under which the closed-loop switched system with designed state feedback controllers is strictly passive from the new input to a designed virtual output is given under a state-dependent switching law. Moreover, the asymptotical stability property of the switched system is achieved by redesigning the introduced new input based on passivity. Finally, a numeral example shows the effectiveness of the proposed method.

关键词： Switched nonlinear systems passivity Recursive backstepping

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中南大学学报（自然科学版） 2009年第S1期40卷 63-67页

作者：于建江张侃健费树岷 School of Information Science and Technology Yancheng Teachers University School of Automation Southeast University

The problem of passivity analysis for a class of discrete-time stochastic neural networks (DSNNs) with time-varying interval delay was investigated. The delay-dependent sufficient criteria were derived in terms of linear matrix inequalities (LMIs). The results are shown to be generalization of some previous results and are less conservative than the existing works. Meanwhile, the computational complexity of the obtained stability conditions is reduced because less variables are involved. A numerical example is given to show the effectiveness and the benefits of the proposed method.

关键词： passivity discrete-time stochastic neural networks (DSNNs) interval delay linear matrix inequalities (LMIs)

Stability and passivity Analysis for Lur'e Singular Systems with Markovian Switching

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International Journal of Automation and computing 2013年第1期10卷 79-84页

作者： Ping-Fang Zhou Yue-Ying Wang Quan-Bao Wang Ji-An Chen Deng-Ping Duan School of Aeronautics and Astronautics Shanghai Jiao Tong University

This paper is concerned with the stochastic stability and passivity analysis for a class of Lur’e singular systems with time-varying delay and Markovian switching. By using the free-weighting matrices approach, a delay-dependent stability criterion, which guarantees that the system is stochastically stable and robustly passive, is derived in terms of linear matrix inequality （LMI）. Two numerical examples are provided to illustrate the effectiveness of the proposed method. 更多还原

关键词： Lur’e singular time-delay systems Markovian jump systems delay-dependent passivity linear matrix inequality (LMI)

Formation control for nonholonomic agents using passivity techniques

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Applied Mathematics and Mechanics(English Edition) 2010年第1期31卷 27-36页

作者：吴凡耿志勇 State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Aerospace EngineeringPeking University

This paper studies the problem of the formation control for the multiple nonholonomic agents on a plane. A dynamic feedback linearization method is used to transform the dynamical model of each agent into two third-order integrator chains. A decentralized formation control law with the inter-agent damping .injection is derived. The asymptotical stability of the overall system is proven using the Lyapunov method. The simulation of the formation maneuver of a planar vehicle shows the effectiveness of the proposed method.

关键词： nonholonomic agents formation full-state linearization passivity

On passivity of state delayed stochastic jump systems

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Journal of Systems Engineering and Electronics 2005年第2期16卷 394-397页

作者： LiuFei InstituteofAutomation SoutherYangtzeUniversityWuxi214036P.R.China

Based on the definition of passivity extended from deterministic system, the sufficient condition on passivity of stochastic jump system is given against unknown state time delay. By means of memoryless state feedback, a class of state delayed stochastic jump systems may be led to passive. The feedback controllers are mode-dependent and can be constructed in terms of the solutions of a set of coupled linear matrix inequalities. A numerical example illustrates the results.

关键词： stochastic jump systems passivity time delay linear matrix inequality.

passivity Control for Uncertain T-S Fuzzy Descriptor Systems

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自动化学报 2006年第5期32卷 674-679页

作者： ZHU Bao-Yan ZHANG Qing-Ling TONG Shao-Cheng Institute of Systems Science Northeastern University Shenyang 110004 College of Sciences Shenyang Jianzhu University Shenyang 110168 Department of Mathematics and Physics Liaoning Institute of Technology Jinzhou 121001

By means of matrix decomposition method a criterion is presented for the admissibility of T-S fuzzy descriptor system. Then, the problem of passivity control is studied for a kind of T-S fuzzy descriptor system with uncertain parameters, and sufficient conditions which make the closed-loop system admissible and strictly passive are obtained based on linear matrix inequality (LMI). The nonstrict LMIs restricted conditions which characterize the descriptor system are transformed into strict ones, so testing admissibility and passivity of the system can be finished simultaneously. The design scheme of state feedback controller is also obtained. Finally, a numerical example is given to show the validity and feasibility of the proposed approach.

关键词： Uncertain T-S fuzzy descriptor systems admissibility passivity linear matrix inequality (LMI)