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作者：Viana, Gustavo S.; Alves, Marcos V. S.; Basilio, Joao Carlos
作者单位：Universidade Federal do Rio de Janeiro
摘要：We address, in this article, the problem of codiagnosability of networked discrete event systems with timing structure (NDESWTS) subject to delays and loss of observations of events between the measurement sites (MS) and local diagnosers (LD). To this end, we first introduce a new timed model that represents the dynamic behavior of the plant based on the, a priori, knowledge of the minimal activation time for each transition of the plant and on the maximal delays in the communication channels ...
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作者：Yi, Bowen; Wang, Ruigang; Manchester, Ian R.
作者单位：University of Sydney; University of Sydney
摘要：In this article, we propose a new approach to design globally convergent reduced-order observers for nonlinear control systems via contraction analysis and convex optimization. Despite the fact that contraction is a concept naturally suitable for state estimation, the existing solutions are either local or relatively conservative when applying to physical systems. To address this, we show that this problem can be translated into an offline search for a coordinate transformation after which the...
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作者：Zafar, Armaghan; Cantoni, Michael; Farokhi, Farhad
作者单位：University of Melbourne
摘要：A structured preconditioned conjugate gradient (PCG) based solver is developed for implementing the Newton updates in second-order methods for a class of constrained network optimal control problems. Of specific interest are problems with discrete-time dynamics arising from the path-graph interconnection of N heterogeneous subsystems. The arithmetic complexity of each PCG step is O(NT), where T is the length of the time horizon. The proposed preconditioning involves a fixed number of block Jac...
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作者：Shakouri, Amir; Assadian, Nima
作者单位：Sharif University of Technology
摘要：This article introduces a class of time-varying controllers for Euler-Lagrange systems such that the convergence occurs at an arbitrary finite time, independently of initial conditions, and free of chattering. The proposed controller is based on a mapping technique and is designed in two steps: First, a conventional (obstacle avoidance) asymptotically stable controller is specified for the nominal system; then, by a simple substitution, a prescribed-time (obstacle avoidance) controller is achi...
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作者：Davila, Jorge; Tranninger, Markus; Fridman, Leonid
作者单位：Instituto Politecnico Nacional - Mexico; Graz University of Technology; Universidad Nacional Autonoma de Mexico
摘要：A finite-time observer for a class of linear time-varying systems with bounded unknown inputs is presented in this note. The design of the observer exploits structural properties of the system and, through a linear operator, allows applying the robust exact differentiator in a block form without requiring additional stabilizing terms. The proposed observer provides an exact estimate of the states after a finite transient time despite the possible instability of the system and the effects of bo...
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作者：Goswami, Debdipta; Paley, Derek A.
作者单位：Princeton University; University System of Maryland; University of Maryland College Park; University System of Maryland; University of Maryland College Park
摘要：This article considers the problem of bilinearization and optimal control of a control-affine nonlinear system by projecting the system dynamics onto the Koopman eigenspace. Although there are linearization techniques like Carleman linearization for embedding a finite-dimensional nonlinear system into an infinite-dimensional space, they depend on the analytic property of the vector fields and work only on polynomial space. The proposed method utilizes the Koopman canonical transform, specifica...
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作者：Cong, Yirui; Wang, Xiangke; Zhou, Xiangyun
作者单位：National University of Defense Technology - China; Australian National University
摘要：Set-membership filter (SMF) has been extensively studied for state estimation in the presence of bounded noises with unknown statistics. Since it was first introduced in the 1960s, the studies on SMF have used the set-based description as its mathematical framework. One important issue that has been overlooked is the optimality of SMF. In this article, we put forward a new mathematical framework for SMF using concepts of uncertain variables. We first establish two basic properties of uncertain...
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作者：Liu, Zhaocong; Yin, Xiang; Shu, Shaolong; Lin, Feng; Li, Shaoyuan
作者单位：Shanghai Jiao Tong University; Tongji University; Wayne State University
摘要：We investigate state estimation and safe controller synthesis for networked discrete-event systems (DESs), where supervisors send control decisions to plants via communication channels subject to communication delays. Previous works on state estimation of networked DES are based on the open-loop system without utilizing the knowledge of the control policy. In this article, we propose a new approach for online estimation and control of networked DES with control delays. We first propose a new s...
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作者：Sasahara, Hampei; Ishizaki, Takayuki; Imura, Jun-ichi
作者单位：Royal Institute of Technology; Institute of Science Tokyo; Tokyo Institute of Technology
摘要：This article investigates a parameterization of all output-rectifying retrofit controllers for distributed design of a structured controller. It has been discovered that all retrofit controllers can be characterized as a constrained Youla parameterization, which is difficult to solve analytically. For synthesis, a tractable and insightful class of retrofit controllers, referred to as output-rectifying retrofit controllers, has been introduced. An unconstrained parameterization of all output-re...
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作者：Babiarz, Artur; Cuong, Le Viet; Czornik, Adam; Doan, Thai Son
作者单位：Silesian University of Technology; National University of Civil Engineering; Vietnam Academy of Science & Technology (VAST)
摘要：We consider a version of the pole placement problem for one-sided linear discrete time-varying linear systems. Our purpose is to prove that uniform complete controllability is equivalent to possibility of arbitrary assignment of the dichotomy spectrum.
