-
作者：Lu, Jieying; Li, Junhui; Su, Weizhou
作者单位：South China University of Technology; South China University of Technology; Peking University
摘要：This work mainly investigates the mean-square stability for a single-input single-output networked linear feedback system. The control signal in the networked system is transmitted over an unreliable channel with data transmission delays and packet dropouts. The transmission delays and packet dropouts are modeled by an independent and identically distributed random process with a known probability mass function. At the channel terminal, a linear receiving strategy is adopted. Based on the unit...
-
作者：Zhou, Shijie; Yang, Luan; Qian, Xuzhe; Lin, Wei
作者单位：Fudan University; Fudan University; Fudan University; Fudan University
摘要：Investigating network stability and synchronization of multiagent systems (MASs) with time delays is crucial in real-world applications. This often involves solving transcendental characteristic equations (TCEs) from system linearization. While stability results for TCEs with real-valued coefficients induced by symmetric networks are well-studied, there is a gap for complex-valued coefficients arising from asymmetric networks. To bridge this gap, we propose a geometric approach by studying sta...
-
作者：Hou, Ruijie; Yu, Yang; Li, Xiuxian
作者单位：Tongji University; Tongji University; Tongji University
摘要：This article focuses on online composite optimization over multiagent networks. In the distributed setting, each agent has its own local loss function, which consists of a convex, strongly convex or strongly convex and smooth function, and a time-varying nonsmooth regularizer. Two distributed online algorithms are proposed and corresponding dynamic regrets are analyzed. Two proposed algorithms are based on signs of relative states. The first algorithm obtains O(root T(C-T + 1)) dynamic regret ...
-
作者：Zhao, Xuena; Liu, Zhijie; Zhang, Shuang; Liu, Yu; He, Wei
作者单位：University of Science & Technology Beijing; University of Science & Technology Beijing; South China University of Technology; South China University of Technology
摘要：In the context of increasingly networked control systems, this article concentrates on the noncollocated control issue of input and output quantization for industrial processes governed by semilinear parabolic partial differential equation (PDE) systems. Both the control and measurement signals are quantized and transmitted through the network, which causes signal errors and reduces the stability and robustness of the system. A Luenberger-type PDE observer is developed to overcome the control ...
-
作者：Ali, Usman; Egerstedt, Magnus
作者单位：De Montfort University; University of California System; University of California Irvine
摘要：This article addresses the problem of optimal mode scheduling subject to dwell time constraints, which is the minimum amount of time a system has to spend in one mode before it can transition to another. The constraint is important since most physical systems cannot switch rapidly between different modes and its presence also eliminates the problem of chattering solutions by construction. We investigate the topology of the optimization space and show that it lacks structure to define local min...
-
作者：Chen, Yiyue; Hashemi, Abolfazl; Vikalo, Haris
作者单位：University of Texas System; University of Texas Austin; Purdue University System; Purdue University
摘要：Distributed stochastic nonconvex optimization problems have recently received attention due to the growing interest of signal processing, computer vision, and natural language processing communities in applications deployed over distributed learning systems (e.g., federated learning). We study the setting where the data is distributed across the nodes of a time-varying directed network, a topology suitable for modeling dynamic networks experiencing communication delays and straggler effects. T...
-
作者：Li, Yudong; Cong, Yirui; Dong, Jiuxiang
作者单位：Northeastern University - China; Northeastern University - China; National University of Defense Technology - China
摘要：This article investigates the boundedness of the disturbance observer (DO) for linear discrete-time systems. In contrast to previous studies that focus on analyzing and/or designing observer gains, our analysis and synthesis approach is based on a set-membership viewpoint. From this viewpoint, a necessary and sufficient existence condition of bounded DOs is first established, which can be easily verified. Furthermore, a set-membership filter-based DO is developed, and its completeness is prove...
-
作者：Li, Tinghua; Jayawardhana, Bayu
作者单位：University of Groningen
摘要：In this work, we propose a collision-free source-seeking control framework for a unicycle robot traversing an unknown cluttered environment. In this framework, obstacle avoidance is guided by the control barrier functions (CBF) embedded in quadratic programming, and the source-seeking control relies solely on the use of onboard sensors that measure the signal strength of the source. To tackle the mixed relative degree and avoid the undesired position offset for the nonholonomic unicycle model,...
-
作者：Alleaume, Valentin; Krstic, Miroslav
作者单位：Universite PSL; MINES ParisTech; University of California System; University of California San Diego
摘要：For the quite extensively developed partial differential equations (PDE) backstepping methodology for coupled linear hyperbolic PDEs, we provide a generalization from finite collections of such PDEs, whose states at each location in space are vector-valued, to previously unstudied infinite (continuum) ensembles of such hyperbolic PDEs, whose states are function-valued. The motivation for studying such systems comes from traffic applications (where driver and vehicle characteristics are continu...
-
作者：Cheng, Yi; Zhang, Yuexi; Wu, Yuhu; Guo, Bao-Zhu
作者单位：Bohai University; Dalian University of Technology; Dalian University of Technology; North China Electric Power University; Chinese Academy of Sciences; North China Electric Power University
摘要：This article investigates the boundary stabilization of a flexible marine riser system that takes rotational inertia into account. This system is described using a nonlinear partial differential equation under the nonlinear controls. Specifically, we focus on applying nonlinear boundary feedback control forces and torques at the top end of the riser. Utilizing measurements of boundary velocity and angular velocity, we devise nonlinear feedback mechanisms aimed at mitigating vibrations within t...
