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作者：Ren, Qifeng; Kao, Yonggui; Wang, Changhong; Xia, Hongwei; Wang, Xiaoli
作者单位：Ocean University of China; Harbin Institute of Technology; Harbin Institute of Technology; Harbin Institute of Technology
摘要：Dynamic characteristics of sliding variables for the generalized discrete reaching law are investigated, such as phenomena of reaching condition and ultimate boundedness of sliding variables. The discussed reaching law is relatively more general than some others in the literature, because it contains a wider range of decay factors, which could be positive or negative. First, a sufficient and necessary condition is obtained ensuring that the generalized reaching law satisfies the reaching condi...
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作者：Xu, Yuhang; Yang, Hao; Jiang, Bin; Polycarpou, Marios M.
作者单位：Nanjing University of Aeronautics & Astronautics; University of Cyprus; University of Cyprus
摘要：This article addresses the distributed optimal fault estimation (FE) and fault-tolerant control (FTC) issues under the bidirectional interaction between a possibly faulty interconnected system and its associated diagnostic interconnected observer. The proposed methodology is based on a framework, named Stackelberg differential graphical game, in which the interconnected observer and its corresponding interconnected system are formulated as two graphical games, and they, respectively, play the ...
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作者：Zhu, Hao; Zhang, Guorui; Li, Yongfu; Leung, Henry
作者单位：Chongqing University of Posts & Telecommunications; University of Calgary
摘要：In this article, a novel variational Bayesian (VB) adaptive Kalman filter with inaccurate nominal process and measurement noise covariances (PMNC) in the presence of outliers is proposed. The probability density functions of state transition and measurement likelihood are modeled as Gaussian-Gamma mixture distributions. The VB inference is used to perform the state and PMNC simultaneously. Simulations show that the effectiveness of the proposed method with inaccurate noise covariances in the p...
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作者：Kato, Rui; Cetinkaya, Ahmet; Ishii, Hideaki
作者单位：Institute of Science Tokyo; Tokyo Institute of Technology; Research Organization of Information & Systems (ROIS); National Institute of Informatics (NII) - Japan
摘要：Motivated by the recent security issues in cyber-physical systems, this article studies the stabilization problem of networked control systems under denial-of-service (DoS) attacks. In particular, we consider to stabilize a nonlinear system with limited data rate via linearization. We employ a deterministic DoS attack model constrained in terms of attacks' frequency and duration, allowing us to cover a large class of potential attacks. To achieve asymptotic stabilization, we propose a resilien...
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作者：Zhang, Wenhan; Wang, Zhenhua; Raissi, Tarek; Shen, Yi
作者单位：Harbin Institute of Technology
摘要：This article proposes an intervalestimation method for discrete-time Lipschitz nonlinear systems via observer design and ellipsoidal analysis. A robust observer with novel structure is presented, which provides more degrees of design freedom and can be applied to enhance the interval estimation performance. To handle the nonlinear term in Lipschitz systems, we use the reformulated Lipschitz property to transform the nonlinear error dynamics into a linear parameter-varying form. After the trans...
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作者：Dragan, Vasile; Costa, Eduardo Fontoura; Popa, Ioan-Lucian; Aberkane, Samir
作者单位：Institute of Mathematics of the Romanian Academy; Romanian Academy; Academy of Romanian Scientists (AOSR); Universidade de Sao Paulo; 1 Decembrie 1918 University Alba Iulia; Universite de Lorraine; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute for Information Sciences & Technologies (INS2I); Centre National de la Recherche Scientifique (CNRS); CNRS - Institute for Information Sciences & Technologies (INS2I); Universite de Lorraine
摘要：This article is devoted to the problem of detectability of a large class of linear stochastic systems with time varying coefficients simultaneously affected by state multiplicative white noise perturbations and Markovian switching. The main contribution of this article is to propose a Popov-Belevich-Hautus-type test, which is equivalent to the detectability of the considered stochastic systems in the sense that all unstable modes produce some nonzero output. The proposed setting unifies in som...
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作者：Watanabe, Ana T. Y.; Leal, Andre B.; Cury, Jose E. R.; de Queiroz, Max H.
作者单位：Universidade do Estado de Santa Catarina; Universidade Federal de Santa Catarina (UFSC)
摘要：In this article, we combine fault diagnosis and prognosis to generalize the notion of safe controllability of discrete-event systems. To do so, we reformulate the notions of safe diagnosability, prognosability, safe controllability by diagnosis, and safe controllability by prognosis in the context of strings. Moreover, we combine these notions to introduce the concept of safe controllability by diagnosis or prognosis, or simply DP-safe controllability. We show that a language can be DP-safe co...
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作者：Adibi, Mahya; van der Woude, Jacob
作者单位：Delft University of Technology
摘要：In this article, we present a reinforcement learning-based scheme for secondary frequency control of lossy inverter-based microgrids. Compared with the existing methods in the literature, we relax the common restrictions on the system, i.e., being lossless, and the transmission lines and loads to have known constant impedances. The proposed secondary frequency control scheme does not require a priori information about system parameters and can achieve frequency synchronization within an ultima...
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作者：Ye, Huawen
作者单位：Central South University
摘要：This article provides finite-time stabilizing control laws for the continuous triangular systems, in which the nominal dynamics is the chain of power integrators with the power of a positive odd rational number. For a class of continuous lower-triangular systems, the linear controllers are designed. By invoking a vector Lyapunov function theory, there is no need to use the usual back-stepping technique and a quite number of inequality computations are avoided. For a class of continuous upper-t...
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作者：Sjoberg, Alexander Meyer; Egeland, Olav
作者单位：Norwegian University of Science & Technology (NTNU)
摘要：An unscented Kalman filter (UKF) for matrix Lie groups is proposed where the time propagation of the state is formulated on the Lie algebra. This is done with the kinematic differential equation of the logarithm, where the inverse of the right Jacobian is used. The sigma points can then be expressed as logarithms in vector form, and time propagation of the sigma points and the computation of the mean and the covariance can be done on the Lie algebra. The resulting formulation is to a large ext...
