Systems & Control Letters最新文献_第8页

Optimal control of port-Hamiltonian systems: Energy, entropy, and exergy 端口-哈密尔顿系统的最优控制：能量、熵和放能

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-26 DOI: 10.1016/j.sysconle.2024.105942

Friedrich M. Philipp , Manuel Schaller , Karl Worthmann , Timm Faulwasser , Bernhard Maschke

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Simultaneous fault-tolerant consensus control and disturbance suppression for multi-agent systems with polynomial form fault under switching topology 开关拓扑结构下具有多项式形式故障的多代理系统的同步容错共识控制与干扰抑制

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-24 DOI: 10.1016/j.sysconle.2024.105946

Dongxin Ren , Guochen Pang , Xiaojian Mou , Xiangyong Chen , Jianlong Qiu , Jinde Cao

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Cluster consensus of finite-field networks with stochastic communication topology 具有随机通信拓扑的有限场网络的集群共识

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-24 DOI: 10.1016/j.sysconle.2024.105944

Yalu Li , Gaoxi Xiao , Haitao Li

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An integrated decision-execution framework of cooperative control for multi-agent systems via reinforcement learning 通过强化学习实现多代理系统协同控制的综合决策-执行框架

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-23 DOI: 10.1016/j.sysconle.2024.105949

Mai-Kao Lu , Ming-Feng Ge , Zhi-Chen Yan , Teng-Fei Ding , Zhi-Wei Liu

{"title":"An integrated decision-execution framework of cooperative control for multi-agent systems via reinforcement learning","authors":"Mai-Kao Lu , Ming-Feng Ge , Zhi-Chen Yan , Teng-Fei Ding , Zhi-Wei Liu","doi":"10.1016/j.sysconle.2024.105949","DOIUrl":"10.1016/j.sysconle.2024.105949","url":null,"abstract":"<div><div>Cooperative control is both a crucial and hot research topic for multi-agent systems (MASs). However, most existing cooperative control strategies guarantee tracking stability under various non-ideal conditions, while the path decision capability is often ignored. In this paper, the integrated decision-execution (IDE) framework is newly presented for cooperative control of multi-agent systems (MASs) to accomplish the integrated task of path decision and cooperative execution. This framework includes a decision layer and a control layer. The decision layer generates a continuous trajectory for the virtual leader to reach the target from its initial position in an unknown environment. To achieve the goal of this layer, (1) the Step-based Adaptive Search Q-learning (SASQ-learning) algorithm is proposed based on reinforcement learning to efficiently find the discrete path, (2) an Axis-based Trajectory Fitting (ATF) method is developed to convert the discrete path into a continuous trajectory for mobile agents. In the control layer, this trajectory is used to regulate the following MASs to achieve cooperative tracking control with the presence of input saturation. Simulation experiments are presented to demonstrate the effectiveness of this framework.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"193 ","pages":"Article 105949"},"PeriodicalIF":2.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectrum computation and optimization for controllability Gramian of networked Laplacian systems with limited control placement 具有有限控制位置的网络拉普拉斯系统可控性格拉米安的频谱计算与优化

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-23 DOI: 10.1016/j.sysconle.2024.105945

Yuexin Cao , Yibei Li , Zhuo Zou , Xiaoming Hu

{"title":"Spectrum computation and optimization for controllability Gramian of networked Laplacian systems with limited control placement","authors":"Yuexin Cao , Yibei Li , Zhuo Zou , Xiaoming Hu","doi":"10.1016/j.sysconle.2024.105945","DOIUrl":"10.1016/j.sysconle.2024.105945","url":null,"abstract":"<div><div>This paper investigates the problem of placing a given number of controls to optimize energy efficiency for a family of linear dynamical systems, whose structure is induced by the Laplacian of a square-grid network. To quantify the performance of control combinations, several metrics have been proposed based on the spectrum of the controllability Gramian. But commonly used algorithms to compute the spectrum are usually time-consuming. In this paper, we first classify five anchor symmetries of the network systems. Then motivated by various advantages of symmetric control combinations, we provide a method to compute the eigenvalues and eigenvectors of their controllability Gramians more efficiently. Specifically, we show that they can be expressed by those of two lower-dimensional matrices. Furthermore, our method can be applied for non-symmetric cases to provide upper and lower bounds for the spectrum of the controllability Gramians. Finally, by employing the sum of eigenvalues, i.e., the trace of controllability Gramian, as the objective function, we provide a closed-form algorithm to the spectrum optimization problem with a given number of controls subject to system controllability.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"193 ","pages":"Article 105945"},"PeriodicalIF":2.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability analysis of systems with time-varying delays for conservatism and complexity reduction 对具有时变延迟的系统进行稳定性分析，以减少保守性和复杂性

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-23 DOI: 10.1016/j.sysconle.2024.105948

Yu-Long Fan , Chuan-Ke Zhang , Yun-Fan Liu , Yong He , Qing-Guo Wang

引用次数: 0

Near optimality of Lipschitz and smooth policies in controlled diffusions 受控扩散中的利普切茨和平稳政策的近最优性

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-23 DOI: 10.1016/j.sysconle.2024.105943

Somnath Pradhan , Serdar Yüksel

{"title":"Near optimality of Lipschitz and smooth policies in controlled diffusions","authors":"Somnath Pradhan , Serdar Yüksel","doi":"10.1016/j.sysconle.2024.105943","DOIUrl":"10.1016/j.sysconle.2024.105943","url":null,"abstract":"<div><div>For optimal control of diffusions under several criteria, due to computational or analytical reasons, many studies have a apriori assumed control policies to be Lipschitz or smooth, often with no rigorous analysis on whether this restriction entails loss. While optimality of Markov/stationary Markov policies for expected finite horizon/infinite horizon (discounted/ergodic) cost and cost-up-to-exit time optimal control problems can be established under certain technical conditions, an optimal solution is typically only measurable in the state (and time, if the horizon is finite) with no apriori additional structural properties. In this paper, building on our recent work (Pradhan and Yüksel, 2024) establishing the regularity of optimal cost on the space of control policies under the Borkar control topology for a general class of controlled diffusions in <span><math><msup><mrow><mi>R</mi></mrow><mrow><mi>d</mi></mrow></msup></math></span>, we establish near optimality of smooth or Lipschitz continuous policies for optimal control under expected finite horizon, infinite horizon discounted, infinite horizon average, and up-to-exit time cost criteria. Under mild assumptions, we first show that smooth/Lipschitz continuous policies are dense in the space of Markov/stationary Markov policies under the Borkar topology. Then utilizing the continuity of optimal costs as a function of policies on the space of Markov/stationary policies under the Borkar topology, we establish that optimal policies can be approximated by smooth/Lipschitz continuous policies with arbitrary precision. While our results are extensions of our recent work, the practical significance of an explicit statement and accessible presentation dedicated to Lipschitz and smooth policies, given their prominence in the literature, motivates our current paper.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"193 ","pages":"Article 105943"},"PeriodicalIF":2.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Periodic event-triggered data-driven control for networked control systems with time-varying delays 具有时变延迟的网络控制系统的周期性事件触发数据驱动控制

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-23 DOI: 10.1016/j.sysconle.2024.105951

Zi-Jie Wei , Kun-Zhi Liu , Yan-Wei Wang , Zhuo-Rui Pan , Si-Xin Wen , Xi-Ming Sun

引用次数: 0

Joint identification of system parameter and noise parameters in quantized systems 量化系统中系统参数和噪声参数的联合识别

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-21 DOI: 10.1016/j.sysconle.2024.105941

Jieming Ke, Yanlong Zhao, Ji-Feng Zhang

{"title":"Joint identification of system parameter and noise parameters in quantized systems","authors":"Jieming Ke, Yanlong Zhao, Ji-Feng Zhang","doi":"10.1016/j.sysconle.2024.105941","DOIUrl":"10.1016/j.sysconle.2024.105941","url":null,"abstract":"<div><div>This paper investigates the joint identification problem of unknown system parameter and noise parameters in quantized systems when the noises involved are Gaussian with unknown variance and mean value. Under such noises, previous investigations show that the unknown system parameter and noise parameters are not jointly identifiable in the single-threshold quantizer case. The joint identifiability in the multi-threshold quantizer case still remains an open problem. This paper proves that the unknown system parameter, the noise variance and the mean value are jointly identifiable if and only if there are at least two thresholds. Then, a decomposition-recombination identification algorithm is proposed to jointly identify the unknown system parameter and noise parameters. Firstly, a technique is designed to convert the identification problem with unknown noise parameters into an extended parameter identification problem with standard Gaussian noises. Secondly, the extended parameter is identified by a stochastic approximation method for quantized systems. For the effectiveness, this paper obtains the strong consistency and the <span><math><msup><mrow><mi>L</mi></mrow><mrow><mi>p</mi></mrow></msup></math></span> convergence for the algorithm under non-persistently exciting inputs and without any <em>a priori</em> knowledge on the range of the unknown system parameter. The almost sure convergence rate is also obtained. Furthermore, when the mean value is known, the unknown system parameter and noise variance can be jointly identified under weaker conditions on the inputs and the quantizer. Finally, the effectiveness of the proposed algorithm is demonstrated by simulation.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"193 ","pages":"Article 105941"},"PeriodicalIF":2.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust control of time-delayed stochastic switched systems with dwell 带停留的时延随机切换系统的鲁棒控制

IF 2.1 3区计算机科学

Systems & Control Letters Pub Date : 2024-10-14 DOI: 10.1016/j.sysconle.2024.105934

E. Gershon , L.I. Allerhand , U. Shaked

{"title":"Robust control of time-delayed stochastic switched systems with dwell","authors":"E. Gershon , L.I. Allerhand , U. Shaked","doi":"10.1016/j.sysconle.2024.105934","DOIUrl":"10.1016/j.sysconle.2024.105934","url":null,"abstract":"<div><div>Linear, state-delayed, discrete-time, stochastic, switched systems are considered, where the problems of stochastic <span><math><msub><mrow><mi>l</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>-gain and state-feedback control designs are treated and solved. We first develop a special version of a bounded real lemma for the said systems for the nominal case.</div><div>Based on the this lemma we derive state-feedback gains for nominal systems where in our solution method, to each subsystem of the switched system, a Lyapunov function is assigned that is non-increasing at the switching instants and where a dwell time constrain is imposed on the system. The assigned Lyapunov function is allowed to vary piecewise linearly in time, starting at the end of the previous switch instant, and it becomes time-invariant after the dwell. Based on the solution of the state-feedback control for nominal systems and exploiting the fact that this solution is affine in the system matrices, a state-feedback control is derived for the polytopic case. We bring a numerical example that demonstrates the solvability and tractability of our solution method.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"193 ","pages":"Article 105934"},"PeriodicalIF":2.1,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0