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作者：Chesi, Graziano
作者单位：University of Hong Kong
摘要：This article addresses the problems of establishing structural stability and the L-2 gain of 2-D mixed continuous-discrete time systems. The first contribution is to show that Lyapunov functions quadratically dependent on the frequency are exact for establishing structural stability. This is particularly important since the existing works that exploit Lyapunov functions provide a much larger upper bound on the dependence on the frequency or other parameters. The second contribution is to propo...
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作者：Nguyen, Quan; Sreenath, Koushil
作者单位：University of Southern California; University of California System; University of California Berkeley
摘要：We present a novel method of optimal robust control through quadratic programs that offers tracking stability while subject to input and state-based constraints as well as safety-critical constraints for nonlinear dynamical robotic systems in the presence of model uncertainty. The proposed method formulates robust control Lyapunov and barrier functions to provide guarantees of stability and safety in the presence of model uncertainty. We evaluate our proposed control design on dynamic walking ...
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作者：Wang, Guoliang; Xu, Lei
作者单位：Liaoning Petrochemical University
摘要：This article addresses the exponential almost sure (EAS) stability and stabilization problems of continuous-time Markovian jump systems with additional stochastic switches. Sufficient conditions for EAS stability are established by applying a method to its stochastic transfer matrix. Particularly, both sojourn time and distribution of such random switchings are considered in the design of a state-feedback controller. Compared with some existing references, the proposed controller could bear un...
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作者：Yang, Junyi; Yu, Hao; Chen, Tongwen
作者单位：University of Alberta
摘要：This article revisits the sampled-data cooperative output regulation problem in a hybrid system framework. Due to the inevitable network-induced imperfections caused by communication among agents, we consider the problem under asynchronous transmissions and time-varying delays. A hybrid system model is introduced to incorporate the aforementioned communication imperfections and facilitate the analysis on internal stability andL(2) (L-infinity) performance of closed-loop systems. A novel Lyapun...
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作者：Dong, Rui-Qi; Wu, Ai-Guo; Zhang, Ying
作者单位：Harbin Institute of Technology
摘要：In this article, anti-unwinding attitude maneuver control for rigid spacecraft is considered. First, in order to avoid the unwinding phenomenon when the system states are restricted to the switching surface, a novel switching function is designed by a hyperbolic sine function such that the switching surface contains the two equilibriums. Then, a sliding mode attitude maneuver controller is developed based on the proposed switching function to ensure the robustness of the closed-loop system to ...
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作者：You, Surong; Hu, Liangjian; Lu, Jianqiu; Mao, Xuerong
作者单位：Donghua University; University of Strathclyde
摘要：This article is concerned with the design of a feedback control based on past states in order to make a given unstable hybrid stochastic differential equation (SDE) to be stable in distribution (stabilization in distribution). This is the first article in this direction. Under the global Lipschitz condition on the coefficients of the given unstable hybrid SDE, we will show that the stabilization in distribution can be achieved by linear delay feedback controls. In particular, we discuss how to...
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作者：Kitsos, Constantinos; Besancon, Gildas; Prieur, Christophe
作者单位：Centre National de la Recherche Scientifique (CNRS); Universite de Toulouse; Communaute Universite Grenoble Alpes; Institut National Polytechnique de Grenoble; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS)
摘要：This article addresses the problem of high-gain observer design for a class of quasi-linear hyperbolic systems (with one characteristic velocity), possibly including nonlocal terms, making them systems of partial integro-differential equations. The design relies on distributed measurement of a part of the state vector. The observer is presented and discussed and the exponential stability in the C-1 spatial norm of the origin for the error system is fully established via Lyapunov-based analysis...
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作者：Wu, Jenq-Lang
作者单位：National Taiwan Ocean University
摘要：This article considers the design of optimal static output feedback controllers with priori structural constraints for linear systems. The structural constraints impose individual elements of the feedback matrix to satisfy certain equality or inequality constraints. The barrier method is used to address an auxiliary minimization problem to attain an approximate solution to the original nonconvex constrained optimization problem. The Lagrange multiplier method is applied to derive necessary con...
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作者：Chen, Jing; Ma, Junxia; Gan, Min; Zhu, Quanmin
作者单位：Jiangnan University; Jiangnan University; Qingdao University
摘要：In this article, a multidirection-based gradient iterative (GI) algorithm for Hammerstein systems with irregular sampling data is proposed. The algorithm updates the parameter estimates using several orthogonal directions at each iteration. The convergence rate is significantly improved with an increasing number of directions. The convergence property and two simulation examples are provided to demonstrate the effectiveness of the proposed algorithm. In addition, the multidirection-based GI al...
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作者：Deng, Wen; Hong, Yiguang; Anderson, Brian D. O.; Shi, Guodong
作者单位：Tongji University; Tongji University; Hangzhou Dianzi University; Commonwealth Scientific & Industrial Research Organisation (CSIRO); CSIRO Data61; Australian National University; University of Sydney
摘要：In this article, we study methods to solve a Sylvester equation in the form of AX + XB = C for given matrices A, B, C is an element of R-nxn, inspired by the distributed linear equation flows. The entries of A. B. and C are separately partitioned into a number of pieces (or sometimes we permit these pieces to overlap), which are allocated to nodes in a network. Nodes hold a dynamic state shared among their neighbors defined from the network structure. Natural partial or full row , column parti...
