Systems & Control Letters最新文献_第2页

Policy gradient method for LQG control via input–output-history representation: Convergence to O(ϵ)-stationary points 通过输入-输出-历史表示的LQG控制的策略梯度方法：收敛到O(λ)-平稳点

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.sysconle.2025.106289

Tomonori Sadamoto , Takashi Tanaka

{"title":"Policy gradient method for LQG control via input–output-history representation: Convergence to O(ϵ)-stationary points","authors":"Tomonori Sadamoto , Takashi Tanaka","doi":"10.1016/j.sysconle.2025.106289","DOIUrl":"10.1016/j.sysconle.2025.106289","url":null,"abstract":"<div><div>We study the policy gradient method (PGM) for the linear quadratic Gaussian (LQG) dynamic output-feedback control problem using an <em>input–output-history</em> (IOH) representation of the closed-loop system. First, we show that any dynamic output-feedback controller is equivalent to a static partial-state feedback gain for a new system representation characterized by a finite-length IOH. Leveraging this equivalence, we reformulate the search for an optimal dynamic output feedback controller as an optimization problem over the corresponding partial-state feedback gain. Next, we introduce a relaxed version of the IOH-based LQG problem by incorporating a small process noise with covariance <span><math><mrow><mi>ϵ</mi><mi>I</mi></mrow></math></span> into the new system to ensure coerciveness, a key condition for establishing gradient-based convergence guarantees. Consequently, we show that a vanilla PGM for the relaxed problem converges to an <span><math><mrow><mi>O</mi><mrow><mo>(</mo><mi>ϵ</mi><mo>)</mo></mrow></mrow></math></span>-<em>stationary</em> point, i.e., <span><math><mover><mrow><mi>K</mi></mrow><mo>¯</mo></mover></math></span> satisfying <span><math><mrow><msub><mrow><mo>‖</mo><mo>∇</mo><mi>J</mi><mrow><mo>(</mo><mover><mrow><mi>K</mi></mrow><mo>¯</mo></mover><mo>)</mo></mrow><mo>‖</mo></mrow><mrow><mi>F</mi></mrow></msub><mo>≤</mo><mi>O</mi><mrow><mo>(</mo><mi>ϵ</mi><mo>)</mo></mrow></mrow></math></span>, where <span><math><mi>J</mi></math></span> denotes the original LQG cost. Numerical experiments empirically indicate convergence to the vicinity of the globally optimal LQG controller.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"209 ","pages":"Article 106289"},"PeriodicalIF":2.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145898077","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

Biochemical relaxation oscillator designed to control molecular computation 生化松弛振荡器设计用于控制分子计算

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-19 DOI: 10.1016/j.sysconle.2026.106359

Xiaopeng Shi , Chuanhou Gao , Denis Dochain , Yuzhen Fan

{"title":"Biochemical relaxation oscillator designed to control molecular computation","authors":"Xiaopeng Shi , Chuanhou Gao , Denis Dochain , Yuzhen Fan","doi":"10.1016/j.sysconle.2026.106359","DOIUrl":"10.1016/j.sysconle.2026.106359","url":null,"abstract":"<div><div>Embedding efficient calculation instructions into biochemical systems has always been a research focus in synthetic biology. Amongst this, the main challenge is how to overcome the contradiction between the parallel occurrence of biochemical reactions and the ordinal implementation of calculation instructions. In response to this challenge, the current work presents a new 4-dimensional biochemical oscillator model based on the relaxation oscillation to generate a pair of symmetric clock signals for dual-module regulation tasks through chemical reaction networks. The pair of symmetric clock signals separately act as a catalyst to participate the corresponding reaction modular of performing calculation, and control their on/off switch if the concentration of the clock signal is nonzero. The detailed discussions are subsequently made on the important effect of the oscillator parameters on controlling the period and the occurrence order of clock signals. Further, the oscillator is applied to control the iteration calculation, along with which a termination strategy is proposed to jump out of the loop.</div></div>","PeriodicalId":49450,"journal":{"name":"Systems & Control Letters","volume":"209 ","pages":"Article 106359"},"PeriodicalIF":2.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038503","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

A Hilbert space method to LQ optimal control of conditional McKean–Vlasov dynamics 条件McKean-Vlasov动力学LQ最优控制的Hilbert空间方法

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-14 DOI: 10.1016/j.sysconle.2026.106356

Liangquan Zhang , Xun Li

引用次数: 0

Converse barrier certificates for finite-time safety verification of continuous-time perturbed deterministic systems 连续时间摄动确定性系统有限时间安全验证的逆向屏障证书

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-22 DOI: 10.1016/j.sysconle.2026.106357

Yonghan Li , Chenyu Wu , Taoran Wu , Shijie Wang , Bai Xue

引用次数: 0

Model predictive control for nonlinear switched systems based on Koopman theory 基于Koopman理论的非线性切换系统模型预测控制

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-15 DOI: 10.1016/j.sysconle.2025.106340

Xuqian Ju , Qing Sun , Dario Dennstädt , Karl Worthmann , Dajun Du , Minrui Fei

引用次数: 0

Complete classification of the long-term behavior of a tumor–immune model with impulsive therapeutic interventions 脉冲治疗干预下肿瘤免疫模型长期行为的完整分类

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-15 DOI: 10.1016/j.sysconle.2026.106355

Nguyen Trong Hieu , Dang Hai Nguyen

引用次数: 0

The Legendre–Clebsch condition for a control problem of Bolza 一类Bolza控制问题的legende - clebsch条件

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-16 DOI: 10.1016/j.sysconle.2025.106339

Javier F. Rosenblueth, Niels H. Wacher

引用次数: 0

Containment control for high-order systems with convex state and nonconvex input constraints under switching topologies 切换拓扑下具有凸状态和非凸输入约束的高阶系统的包容控制

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-24 DOI: 10.1016/j.sysconle.2026.106364

Jiayao Zhang, Zhi Li

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引用次数: 0

Distributed state estimation of linear descriptor systems 线性广义系统的分布状态估计

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-19 DOI: 10.1016/j.sysconle.2026.106360

Juhi Jaiswal , Vikas Kumar Mishra , Raghunathan Rengaswamy , Naim Bajcinca

引用次数: 0

Prescribed-time output feedback for linear systems in normal form: Robustness analysis and digital implementation under measurement noise 标准线性系统的规定时间输出反馈：测量噪声下的鲁棒性分析和数字实现

IF 2.5 3区计算机科学

Systems & Control Letters Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.sysconle.2026.106344

Yury Orlov , Miguel Arambula , Denis Efimov

引用次数: 0