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作者：Briat, Corentin; Khammash, Mustafa
作者单位：Swiss Federal Institutes of Technology Domain; ETH Zurich
摘要：In-silico control of complex stochastic biological systems is a promising area of cybergenetics, which provides enabling theoretical and practical tools for the real-time control of living cells with digital computers. We demonstrate here that simple proportional-integral control laws can be used to control both the mean and the variance of the expression product of a simple gene expression network. Extensions to more general unimolecular networks, networks with input delay, and to a gene expr...
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作者：Vinod, Abraham P.; Oishi, Meeko M. K.
作者单位：University of New Mexico; University of Texas System; University of Texas Austin; University of New Mexico
摘要：Probabilistic occupancy, the likelihood that the state at a known future time lies in a given set, is important in a variety of stochastic motion planning problems. We provide efficient computational techniques, based in Fourier transforms, to characterize the stochasticity of the future state for Markov jump affine systems. This class of systems captures a variety of important dynamics in planning problems, including the Dubins' vehicle. We employ convex optimization to compute outer approxim...
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作者：Ma, Lifeng; Wang, Zidong; Hu, Jun; Han, Qing-Long
作者单位：Nanjing University of Science & Technology; Shandong University of Science & Technology; Brunel University; Harbin University of Science & Technology; Swinburne University of Technology
摘要：This article deals with the recursive filtering problem for nonlinear time-varying stochastic systems subject to possible measurement outliers. In order to mitigate the effects from possible abnormal measurements, we construct a filter with a saturation constraint imposed on the innovations where the saturation level is adaptively determined according to the estimation errors. Two performance indices, namely, the finite-horizon H-infinity specification and the envelope-constraint criterion wit...
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作者：Chi, Ronghu; Hui, Yu; Chien, Chiang-Ju; Huang, Biao; Hou, Zhongsheng
作者单位：Qingdao University of Science & Technology; Huafan University; University of Alberta; Qingdao University
摘要：This article investigates a challenging open problem of convergence analysis of sampled-data iterative learning control for locally Lipschitz continuous (LLC) nonlinear nonaffine continuous-time systems. The restrictive repetitive conditions are relaxed by taking the LLC nonlinear nonaffine systems with iteratively variant initial states, reference trajectories, and exogenous disturbances into consideration. A new convergence analysis method is proposed by incorporating the mathematical induct...
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作者：Doria-Cerezo, Arnau; Olm, Josep M.; Biel, Domingo; Fossas, Enric
作者单位：Universitat Politecnica de Catalunya; Universitat Politecnica de Catalunya; Universitat Politecnica de Catalunya; Universitat Politecnica de Catalunya
摘要：A number of physical systems allow a complex-valued representation. This article extends the theory of sliding modes to a class of nonlinear systems described by complex-valued variables. Hence, states, parameters, control actions, and sliding manifolds belong, in general, to the complex field. In this article, it is also shown that the proposed design in the complex-valued framework provides shorter reaching times to the sliding manifold than the standard sliding-mode design at equal initial ...
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作者：Wen, Min; Topcu, Ufuk
作者单位：University of Pennsylvania; Alphabet Inc.; Google Incorporated; University of Texas System; University of Texas Austin
摘要：We study a safe reinforcement learning problem, in which the constraints are defined as the expected cost over finite-length trajectories. We propose a constrained cross-entropy-based method to solve this problem. The key idea is to transform the original constrained optimization problem into an unconstrained one with a surrogate objective. The method explicitly tracks its performance with respect to constraint satisfaction and thus is well suited for safety-critical applications. We show that...
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作者：Xiao, Qiang; Zeng, Zhigang; Huang, Tingwen; Lewis, Frank L.
作者单位：Huazhong University of Science & Technology; Qatar Foundation (QF); Texas A&M University Qatar; University of Texas System; University of Texas Arlington
摘要：In this article, positivity and global exponential stability for a class of timescale-type differential-difference equations with bounded time-varying delay are considered. At first, a sufficient and necessary condition for the positivity of matrix-valued timescale-type exponential function is obtained. Based on this, an explicit criterion for the positivity of coupled timescale-type differential-difference equations with delays bounded above is acquired by timescale-type induction method. Bes...
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作者：Xue, Wenchao; Chen, Sen; Zhao, Cheng; Huang, Yi; Su, Jianbo
作者单位：Chinese Academy of Sciences; Academy of Mathematics & System Sciences, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shaanxi Normal University; Shandong University; Shanghai Jiao Tong University
摘要：Proportional-integral (PI) control/loop has been widely used in numerous industrial processes. This article focuses on integrating uncertainty estimator into PI controller for better robustness and transient performance against uncertain nonlinear coupling dynamics and time-varying disturbances. First, the descriptions for the sizes of three kinds of uncertainties in a class of multi-input-multi-output nonlinear systems are discussed. Then, the tuning laws of the typical uncertainty estimator,...
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作者：Hastir, Anthony; Winkin, Joseph J.; Dochain, Denis
作者单位：University of Namur; University of Namur; Universite Catholique Louvain
摘要：Sufficient conditions are established for the exponential stability/instability of the equilibrium profiles for a linearized model of nonisothermal axial dispersion tubular reactors. The considered reactors are assumed to involve a chemical reaction of the form A -> B, where A and B denote the reactant and the product, respectively, and where the Peclet numbers appearing in the energy and mass balance partial differential equations are assumed to be equal. First, different kinds of linearizati...
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作者：Ma, Hong-Jun; Xu, Lin-Xing
作者单位：Northeastern University - China; Northeastern University - China
摘要：This article addresses the decentralized tracking control problem for a class of strong interconnected nonlinear systems with actuator faults. The considered interconnections are allowed to be dominated by some bounding functions, which are linear growth in the status of all subsystems. First, an adaptive high-gain technique is introduced to deal with the unknown strong interconnections. Then, a group of fault-tolerant controllers is designed to adaptively compensate for the effects of the act...
