-
作者：Scroccaro, Pedro Zattoni; Kolarijani, Arman Sharifi; Esfahani, Peyman Mohajerin
作者单位：Delft University of Technology
摘要：In the past few years, online convex optimization (OCO) has received notable attention in the control literature thanks to its flexible real-time nature and powerful performance guarantees. In this article, we propose new step-size rules and OCO algorithms that simultaneously exploit gradient predictions, function predictions and dynamics, features particularly pertinent to control applications. The proposed algorithms enjoy static and dynamic regret bounds in terms of the dynamics of the refe...
-
作者：McAllister, Robert D.; Rawlings, James B.
作者单位：University of California System; University of California Santa Barbara
摘要：In this article, we establish a collection of new theoretical properties for nonlinear stochastic model predictive control (SMPC). Based on the concept of stochastic input-to-state stability (SISS), we define robust asymptotic stability in expectation (RASiE) and establish that nonlinear SMPC renders the origin of the closed-loop system RASiE. Moreover, we establish several new foundational results that have not been addressed in previous research. Specifically, we verify that, under basic reg...
-
作者：Naha, Arunava; Teixeira, Andre; Ahlen, Anders; Dey, Subhrakanti
作者单位：Uppsala University; Uppsala University
摘要：One of the most studied forms of attacks on the cyber-physical systems is the replay attack. The statistical similarities of the replayed signal and the true observations make the replay attack difficult to detect. In this article, we address the problem of replay attack detection by adding watermarking to the control inputs and then perform resilient detection using cumulative sum (CUSUM) test on the joint statistics of the innovation signal and the watermarking signal, whereas existing work ...
-
作者：Wang, Ji; Krstic, Miroslav
作者单位：Xiamen University; University of California System; University of California San Diego
摘要：In this article, we present an event-triggered boundary control scheme with a, likewise, event-triggered batch least-squares parameter identification for a $2\times 2$ hyperbolic PDE-ODE system, where two coefficients of the in-domain couplings between two transport PDEs, and the system parameter of a scalar ODE, are unknown. The triggering condition is designed based on evaluating both the actuation deviation caused by the difference between the plant states and their sampled values, and the ...
-
作者：Seeber, Richard; Dourdoumas, Nicolaos
作者单位：Graz University of Technology
摘要：Systems governed by Riccati differential equations arise in several areas of control system theory. In combination with a linear fractional output, observability of such systems is relevant in the context of robotics and computer vision, for example, when studying the reconstruction of point locations from their perspective projections. The so-called perspective observability criteria exist to verify this observability property algebraically, but they provide only a binary answer. The present ...
-
作者：Yan, Jiayuan; Hu, Bin; Guan, Zhi-Hong
作者单位：Huazhong University of Science & Technology
摘要：In this article, the controllability is investigated for nonlinear impulsive and switching systems with input delay. Using the fixed point method, two controllability conditions are developed for such systems under different nonlinear constraints. First, the Lipschitz nonlinear condition is considered. A control mapping is constructed based on the input matrix condition, and a nonlinear operator is introduced to convert the controllability into the existence of a fixed point. A sufficient cont...
-
作者：Zhang, Kuize
作者单位：University of Surrey
摘要：Detectability is a fundamental property in partially observed dynamical systems. It describes whether one can use observed output sequences to determine the current and subsequent states. Delayed detectability generalizes detectability in the sense that when doing state estimation at a time instant, some outputs after the instant are also considered, making the estimation more accurate. In this article, we use a novel concurrent-composition method to give polynomial-time algorithms for verifyi...
-
作者：Grigoletto, Tommaso; Ticozzi, Francesco
作者单位：University of Padua
摘要：The problem of reducing a hidden Markov model (HMM) to one of smaller dimension that exactly reproduces the same marginals is tackled by using a system-theoretic approach. Realization theory tools are extended to HMMs by leveraging suitable algebraic representations of probability spaces. We propose two algorithms that return coarse-grained equivalent HMMs obtained by stochastic projection operators: the first returns models that exactly reproduce the single-time distribution of a given output...
-
作者：Guo, Xiang-Gui; Liu, Pei-Ming; Wu, Zheng-Guang; Zhang, Dan; Ahn, Choon Ki
作者单位：University of Science & Technology Beijing; Zhejiang University; Chengdu University; Zhejiang University of Technology; Korea University
摘要：This article investigates the group consensus of heterogeneous multiagent systems (MASs) with time-varying unknown nonidentical direction (TVUND) faults under stochastic false data injection (FDI) attacks. A fault-tolerant mechanism based on the Nussbaum function method that does not require the upper and lower bounds of the fault scaling factors nor fault directions is proposed. To bypass the challenges resulting from the summation of multiple Nussbaum functions, a group of new Nussbaum funct...
-
作者：Qian, Jiachen; Duan, Zhisheng; Duan, Peihu; Li, Zhongkui
作者单位：Peking University; Royal Institute of Technology
摘要：Compared with linear time invariant systems, linear periodic system can describe the periodic processes arising from nature and engineering more precisely. However, the time-varying system parameters increase the difficulty of the research on periodic system, such as stabilization and observation. This article aims to consider the observation problem of periodic systems by bridging two fundamental filtering algorithms for periodic systems with a sensor network: consensus-on-measurement-based d...
