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作者：Mele, Adriano; De Tommasi, Gianmaria; Pironti, Alfredo
作者单位：University of Naples Federico II
摘要：In this article, the finite-time stabilization problem is solved for a linear time-varying system with unknown control direction by exploiting a modified version of the classical extremum-seeking algorithm. We propose to use a suitable oscillatory input to modify the system dynamics, at least in an average sense, so as to satisfy a differential linear matrix inequality condition, which in turn guarantees that the system's state remains inside a prescribed time-varying hyperellipsoid in the sta...
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作者：Bobtsov, Alexey; Yi, Bowen; Ortega, Romeo; Astolfi, Alessandro
作者单位：ITMO University; University of Sydney; Instituto Tecnologico Autonomo de Mexico; Imperial College London; University of Rome Tor Vergata
摘要：The problem of estimating constant parameters from a standard vector linear regression equation in the absence of sufficient excitation in the regressor is addressed. The first step to solve the problem consists in transforming this equation into a set of scalar ones using the well-known dynamic regressor extension and mixing technique. Then, a novel procedure to generate new scalar exciting regressors is proposed. The superior performance of a classical gradient estimator using this new regre...
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作者：Sarafrazi, Mohammad Amin; Kotta, Ulle; Bartosiewicz, Zbigniew
作者单位：Tallinn University of Technology; Bialystok University of Technology
摘要：Observability of nonlinear systems with unknown inputs was recently characterized in terms of dimension of an observability codistribution, obtained from Lie derivatives of outputs with respect to an infinite set of vector fields. However, the suggested stopping criterion does not apply to all systems, and the applicability condition is difficult to check. This article provides a new stopping criterion which holds universally and is easy to check. Moreover, we show that for systems with n stat...
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作者：Coutinho, Pedro Henrique Silva; Palhares, Reinaldo Martinez
作者单位：Universidade Federal de Minas Gerais; Universidade Federal de Minas Gerais
摘要：This technical article investigates the problem of event-triggered gain-scheduling control of nonlinear systems. The considered class of nonlinear systems is such that an equivalent local polytopic model is obtained. By following the codesign approach, it is performed the simultaneous design of the dynamic event-triggering mechanism (ETM) and the gain-scheduled controller parameterized in terms of state-dependent scheduling functions. As the state information is only available to the controlle...
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作者：Yao, Weijia; Lin, Bohuan; Anderson, Brian D. O.; Cao, Ming
作者单位：University of Groningen; University of Groningen; Australian National University
摘要：Accurately following a geometric desired path in a two-dimensional (2-D) space is a fundamental task for many engineering systems, in particular mobile robots. When the desired path is occluded by obstacles, it is necessary and crucial to temporarily deviate from the path for obstacle/collision avoidance. In this article, we develop a composite guiding vector field via the use of smooth bump functions and provide theoretical guarantees that the integral curves of the vector field can follow an...
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作者：Kumar, Sandeep; Belur, Madhu N.
作者单位：Defence Research & Development Organisation (DRDO); Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Bombay
摘要：Single-input single-output (SISO), systems with zeros interlacing poles (ZIP) have been extensively studied in the literature and have received interest widely. However, the ZIP property for multiple-input and multiple-output (MIMO), systems has not been pursued sufficiently. In this article, we pursue the ZIP property for MIMO systems and link this to strict passivity. For the class of systems that admit a symmetric state-space realization, which for the SISO case is equivalent to ZIP, we obt...
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作者：Bahraini, Masoud; Zanon, Mario; Falcone, Paolo; Colombo, Alessandro
作者单位：Chalmers University of Technology; IMT School for Advanced Studies Lucca; Universita di Modena e Reggio Emilia; Polytechnic University of Milan
摘要：In networked control systems, impairments of the communication channel can be disruptive to stability and performance. In this article, we consider the problem of scheduling the access to limited communication resources for a number of decoupled systems subject to state and input constraints, whose loops need to be closed over the network. The schedule must be designed to robustly preserve the invariance property of each system, which, in turn, guarantees constraint satisfaction. To that end, ...
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作者：Li, Wenjie; Assaad, Mohamad; Zheng, Shiqi
作者单位：Universite Paris Saclay; Huawei Technologies; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); China University of Geosciences
摘要：This article addresses a distributed optimization problem in a communication network where nodes are active sporadically. Each active node applies some learning method to control its action to maximize the global utility function, which is defined as the sum of the local utility functions of active nodes. We deal with stochastic optimization problem with the setting that utility functions are disturbed by some nonadditive stochastic process. We consider a more challenging situation where the l...
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作者：Zhao, Xueyan; Deng, Feiqi
作者单位：South China University of Technology
摘要：In this article, the Halanay inequality is generalized into the time-varying version under simple and natural conditions, without constant to bound the time-varying coefficients. The solution of the underlying inequality is estimated by virtue of the feasible function pair associated with the coefficients and delays. Corollaries are given for typical special cases. Some approaches are illustrated for the searching of the initial feasible pairs, and an iterative procedure is proposed for the op...
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作者：Fabiani, Filippo; Tajeddini, Mohammad Amin; Kebriaei, Hamed; Grammatico, Sergio
作者单位：University of Oxford; University of Tehran; Delft University of Technology
摘要：We propose a two-layer, semidecentralized algorithm to compute a local solution to the Stackelberg equilibrium problem in aggregative games with coupling constraints. Specifically, we focus on a single-leader, multiple-follower problem, and after equivalently recasting the Stackelberg game as a mathematical program with complementarity constraints (MPCC), we iteratively convexify a regularized version of the MPCC as the inner problem, whose solution generates a sequence of feasible descent dir...
