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作者：Rabehi, Djahid; Meslem, Nacim; El Amraoui, Adnen; Ramdani, Nacim
作者单位：Universite de Orleans; Communaute Universite Grenoble Alpes; Institut National Polytechnique de Grenoble; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Universite d'Artois
摘要：This article addresses the modeling and the design of an interval state observer for a linear time-invariant plant in the presence of sporadically available measurements corrupted by unknown-but-bounded errors and noise. The interval observer is modeled as an impulsive system where an impulsive correction is made whenever a measurement is available. The non-negativity of the observation error between two successive measurements is preserved by applying the internal positivity based on the Mull...
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作者：Lesage-Landry, Antoine; Taylor, Joshua A.; Shames, Iman
作者单位：University of California System; University of California Berkeley; University of Melbourne; University of Toronto; University of Melbourne
摘要：We present the online Newton's method, a single-step second-order method for online nonconvex optimization. We analyze its performance and obtain a dynamic regret bound that is linear in the cumulative variation between round optima. We show that if the variation between round optima is limited, the method leads to a constant regret bound. In the general case, the online Newton's method outperforms online convex optimization algorithms for convex functions and performs similarly to a specializ...
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作者：Fotiadis, Filippos; Rovithakis, George A.
作者单位：University System of Georgia; Georgia Institute of Technology; Aristotle University of Thessaloniki
摘要：This article considers the problem of prescribed performance tracking control for a class of uncertain, multi-input multi-output (MIMO) nonlinear systems having a low-triangular structure, with possibly discontinuous reference signals. Prescribed performance means that the output tracking errors should converge to a prescribed maximum residual set in fixed time, exhibiting a predefined maximum overshoot. The controller we propose is of low complexity and is designed according to the philosophy...
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作者：Koenig, Adam W.; D'Amico, Simone
作者单位：Stanford University
摘要：This article presents a new fast and robust algorithm that provides fuel-optimal impulsive control input sequences that drive a linear time-variant system to a desired state at a specified time. This algorithm is applicable to a broad class of problems where the cost is expressed as a time-varying norm-like function of the control input, enabling inclusion of complex operational constraints in the control planning problem. First, it is shown that the reachable sets for this problem have identi...
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作者：Lu, Junjie; She, Zhikun; Liu, Bodan; Ge, Shuzhi Sam
作者单位：University of Science & Technology Beijing; Beihang University; National University of Singapore
摘要：This article concerns the theoretical analysis and mechanical verification of input-to-state stability (ISS) for nonautonomous discrete-time switched systems. To start with, based on a bounded function and the average dwell time, we successively propose less conservative sufficient conditions for uniform input-to-state stability, global uniform asymptotic input-to-state stability, and global uniform exponential input-to-state stability of nonautonomous switched nonlinear systems. Then, for sys...
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作者：Feketa, Petro; Schaum, Alexander; Meurer, Thomas
作者单位：University of Kiel
摘要：We prove the existence of a multidimensional nontrivial invariant toroidal manifold for the Kuramoto network with adaptive coupling. The constructed invariant manifold corresponds to the multicluster behavior of the oscillators phases. Contrary to the static coupling, the adaptive coupling strengths exhibit quasiperiodic oscillations preserving zero phase-difference within clusters. The derived sufficient conditions for the existence of the invariant manifold provide a tradeoff between the nat...
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作者：Haesaert, Sofie; Soudjani, Sadegh
作者单位：Eindhoven University of Technology; Newcastle University - UK
摘要：Discrete-time stochastic systems are an essential modeling tool for many engineering systems. We consider stochastic control systems that are evolving over continuous spaces. For this class of models, methods for the formal verification and synthesis of control strategies are computationally hard and generally rely on the use of approximate abstractions. Building on approximate abstractions, we compute control strategies with lower- and upper-bounds for satisfying unbounded temporal logic spec...
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作者：Halder, Abhishek
作者单位：University of California System; University of California Santa Cruz
摘要：In this article the problem of ellipsoidal bounding of convex set-valued data, where the convex set is obtained by the p-sum of finitely many ellipsoids, for any real p >= 1 is studied. The notion of p-sum appears in the Brunn-Minkowski-Firey theory in convex analysis, and generalizes several well-known set-valued operations, such as the Minkowski sum of the summand convex sets (here, ellipsoids). We derive an outer ellipsoidal parameterization for the p-sum of a given set of ellipsoids, and c...
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作者：Gagrani, Mukul; Ouyang, Yi; Rasouli, Mohammad; Nayyar, Ashutosh
作者单位：University of Southern California; Stanford University
摘要：Consider a remote estimation problem where a sensor wants to communicate the state of an uncertain source to a remote estimator over a finite-time horizon. The uncertain source is modeled as an autoregressive process with bounded noise. Given that the sensor has a limited communication budget, the sensor must decide when to transmit the state to the estimator who has to produce real-time estimates of the source state. In this article, we consider the problem of finding a scheduling strategy fo...
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作者：Koch, Anne; Montenbruck, Jan Maximilian; Allgower, Frank
作者单位：University of Stuttgart
摘要：Due to their relevance in controller design, we consider the problem of determining the L-2-gain, passivity properties, and conic relations of an input-output system. While, in practice, the input-output relation is often undisclosed, input-output data tuples can be sampled by performing (numerical) experiments. Hence, we present sampling strategies for discrete time and continuous time linear time-invariant systems to iteratively determine the L-2-gain, the shortage of passivity and the cone ...
