-
作者：Sassano, Mario; Mylvaganam, Thulasi
作者单位：University of Rome Tor Vergata; Imperial College London
摘要：Infinite-horizon optimal control problems for nonlinear systems are considered. Due to the nonlinear and intrinsically infinite-dimensional nature of the task, solving such optimal control problems is challenging. In this article, an exact finite-dimensional characterization of the optimal solution over the entire horizon is proposed. This is obtained via the (static) minimization of a suitably defined function of (projected) trajectories of the underlying Hamiltonian dynamics on a hypersphere...
-
作者：Xu, Henglei; Mao, Xuerong
作者单位：University of Strathclyde
摘要：In this article, the authors apply the Razumikhin technique to investigate the stabilization of hybrid stochastic systems by feedback control based on discrete-time state observations, rather than the widely used comparison idea or Lyapunov functional method to this problem. Further, we extend the Razumikhin method to study the asymptotic boundedness of hybrid stochastic systems. The coefficients of these stochastic systems considered do not meet the usual linear growth condition, but are high...
-
作者：Shang, Chao; Ye, Hao; Huang, Dexian; Ding, Steven X.
作者单位：Tsinghua University; University of Duisburg Essen
摘要：The need for exact distributions in probabilistic fault detection design is hardly fulfilled. The recent moment-based distributionally robust fault detection (DRFD) design secures robustness against inexact distributions but suffers from overpessimism. To address this issue, we develop a new DRFD design scheme by using unimodality, a ubiquitous property of real-life distributions. To evaluate worst-case false alarm rates, a new generalized Gauss bound is first attained, which is less conservat...
-
作者：Shi, Kanghong; Petersen, Ian R.; Vladimirov, Igor G.
作者单位：Australian National University
摘要：This article provides a protocol to address the robust output feedback consensus problem for networked heterogeneous nonlinear negative-imaginary (NI) systems with free body dynamics. We extend the definition of nonlinear NI systems to allow for systems with free-body motion. A new stability result is developed for the interconnection of a nonlinear NI system and a nonlinear output strictly negative-imaginary (OSNI) system. Also, a class of networked nonlinear OSNI controllers is proposed to a...
-
作者：Aschenbruck, Tim; Petzke, Felix; Rumschinski, Philipp; Streif, Stefan
作者单位：Technische Universitat Chemnitz
摘要：Several control architectures, such as decentralized, distributed, and hierarchical control, have been elaborated over the past decades for controlling systems composed of a set of subsystems. However, computational complexity and constraint satisfaction are still challenging tasks. We present an approach to control an ensemble of similar heterogeneous systems with input and state constraints via an identical control input. This control input is globally admissible and computed based on an agg...
-
作者：Tayyebi, Ali; Anta, Adolfo; Dorfler, Florian
作者单位：Swiss Federal Institutes of Technology Domain; ETH Zurich; Austrian Institute of Technology (AIT)
摘要：This article introduces a new grid-forming control for a grid-connected dc-ac power converter, termed hybrid angle control (HAC) that combines the dc-based matching control with a novel nonlinear angle feedback reminiscent of (though not identical to) classic droop control. The synthesis of HAC is inspired by the complementary benefits of the dc-based matching and ac-based grid-forming controls as well as ideas from direct angle control and nonlinear damping assignment. The proposed HAC is app...
-
作者：Liu, Changxin; Shi, Yang; Li, Huiping; Du, Wenli
作者单位：East China University of Science & Technology; University of Victoria; Northwestern Polytechnical University
摘要：In this article, we study decentralized convex constrained optimization problems in networks. We focus on the dual averaging-based algorithmic framework that is well-documented to be superior in handling constraints and complex communication environments simultaneously. Two new decentralized dual averaging (DDA) algorithms are proposed. In the first one, a second-order dynamic average consensus protocol is tailored for DDA-type algorithms, which equips each agent with a provably more accurate ...
-
作者：Ng, Yonhon; van Goor, Pieter; Hamel, Tarek; Mahony, Robert
作者单位：Australian National University; Centre National de la Recherche Scientifique (CNRS); Universite Cote d'Azur; Institut Universitaire de France
摘要：This article develops an equivariant symmetry for second-order kinematic systems on matrix Lie groups and uses this symmetry for observer design. The state of a second-order kinematic system on a matrix Lie group is naturally posed on the tangent bundle of the group with the inputs lying in the tangent of the tangent bundle known as the double-tangent bundle. We provide a simple parameterization of both the tangent bundle state-space and the input space (the fiber space of the double-tangent b...
-
作者：Soloperto, Raffaele; Koehler, Johannes; Allgoewer, Frank
作者单位：University of Stuttgart
摘要：In this article, we propose a novel nonlinear model predictive control (MPC) scheme without terminal ingredients for output tracking. The control objective is to steer the output of the controlled system toward some desired set, or toward the best reachable set, in the case of unreachable targets. The considered MPC formulation combines a stabilizing MPC scheme without terminal ingredients with an output tracking formulation using an artificial steady state. In addition, we propose an offset c...
-
作者：Kost, Oliver; Dunik, Jindrich; Straka, Ondrej
作者单位：University of West Bohemia Pilsen
摘要：This article deals with noise identification of a system described by the linear time-varying state-space model using correlation methods. In particular, the stress is laid on the measurement difference method (MDM) as a universal tool allowing estimation of moments and parameters of the state and measurement noises. The recent results are summarized in a common framework and the full (and weighted) MDM implementation is developed. This implementation provides unbiased and weakly consistent es...
