Automatica最新文献_第4页

Vibrational control of position-input and force-input mechanical systems 位置输入和力输入机械系统的振动控制

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-20 DOI: 10.1016/j.automatica.2025.112450

Sevak Tahmasian

引用次数: 0

Robust variable-horizon MPC with adaptive terminal constraints 具有自适应终端约束的鲁棒变视界MPC

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-20 DOI: 10.1016/j.automatica.2025.112465

Renato Quartullo, Gianni Bianchini, Andrea Garulli, Antonio Giannitrapani

引用次数: 0

Results on sparsity and estimation accuracy in Orthogonal Matching Pursuit with application to optimal input design 正交匹配追踪的稀疏性和估计精度及其在最优输入设计中的应用

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-20 DOI: 10.1016/j.automatica.2025.112461

Javad Parsa , Cristian R. Rojas , Håkan Hjalmarsson

{"title":"Results on sparsity and estimation accuracy in Orthogonal Matching Pursuit with application to optimal input design","authors":"Javad Parsa , Cristian R. Rojas , Håkan Hjalmarsson","doi":"10.1016/j.automatica.2025.112461","DOIUrl":"10.1016/j.automatica.2025.112461","url":null,"abstract":"<div><div>Appropriate excitation conditions are essential for reliably identifying sparse models. In regression problems, these conditions are often characterized by properties of the regressor matrix, with mutual coherence, the maximum correlation between regressors, playing a central role in enabling sparse recovery. However, obtaining sparse estimates is rarely the sole objective, as estimation accuracy is also important. When a model is used in an application, e.g. control design, acceptable performance with high probability can be (approximately) ensured by requiring the confidence ellipsoid to be contained in a certain ellipsoid which depends on the performance specifications in the application. However, it is well known that experiments fulfilling such requirements using minimal excitation energy (least-costly experiments) tend to generate highly correlated regressors, in conflict with the requirements for sparsity. Adhering to this setting and focusing on the popular orthogonal matching pursuit algorithm (OMP), we derive conditions for simultaneously ensuring sparsity and having the confidence ellipsoid contained in a pre-specified ellipsoid. We extend this result to a recently proposed two stage sparse estimation method where a linear transformation is used in a pre-processing step before OMP to reduce mutual coherence. A final contribution is to show that our theoretical results are of importance in optimal input design for sparse models. Specifically, we show that the choice of hyperparameters in a recently proposed input design method can be guided by our contributions and we show explicitly how this can be done in this two-stage method.</div></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":"179 ","pages":"Article 112461"},"PeriodicalIF":4.8,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Event-triggered gain scheduling of 2 × 2 linear hyperbolic PDEs with time and space varying coupling coefficients 时空耦合系数变化的2 × 2线性双曲偏微分方程的事件触发增益调度

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-20 DOI: 10.1016/j.automatica.2025.112455

Nicolas Espitia , Jean Auriol

{"title":"Event-triggered gain scheduling of 2 × 2 linear hyperbolic PDEs with time and space varying coupling coefficients","authors":"Nicolas Espitia , Jean Auriol","doi":"10.1016/j.automatica.2025.112455","DOIUrl":"10.1016/j.automatica.2025.112455","url":null,"abstract":"<div><div>In this paper, we address the problem of exponential stabilization of 2 × 2 hyperbolic PDEs systems with time- and space-varying in-domain coupling coefficients using event-triggered gain scheduling. More precisely, at each triggering time, we apply the control input as the classical static backstepping control law while scheduling the gains of the boundary controller according to the triggering mechanism and by solely considering the spatial variation of the coefficients. We present two different event-triggered gain scheduling strategies. The first strategy relies on a Lyapunov-based event-triggering condition, and the <span><math><msup><mrow><mi>L</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> closed-loop exponential stability is shown using a Lyapunov analysis. The second one is a small-gain based event-triggering condition and builds on the <span><math><msup><mrow><mi>L</mi></mrow><mrow><mi>∞</mi></mrow></msup></math></span>-norm. The <span><math><msup><mrow><mi>L</mi></mrow><mrow><mi>∞</mi></mrow></msup></math></span> closed-loop exponential stability is shown by combining ISS estimates with small-gain arguments. In both cases, we prove that we avoid the Zeno phenomenon, provided that the coupling coefficients are slowly time-varying. Unlike existing results in the literature, the proposed approaches do not require solving time-varying backstepping kernel equations in real-time resulting in reduced computational burden and broader applicability.</div></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":"179 ","pages":"Article 112455"},"PeriodicalIF":4.8,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Local stability of congestion control protocols: A MIMO gain and phase perspective 拥塞控制协议的局部稳定性：MIMO增益和相位视角

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-19 DOI: 10.1016/j.automatica.2025.112435

Ding Zhang , Ioannis Lestas , Li Qiu

{"title":"Local stability of congestion control protocols: A MIMO gain and phase perspective","authors":"Ding Zhang , Ioannis Lestas , Li Qiu","doi":"10.1016/j.automatica.2025.112435","DOIUrl":"10.1016/j.automatica.2025.112435","url":null,"abstract":"<div><div>This paper presents a systematic approach to analyzing the stability of linearized models of network congestion control protocols from a novel multi-input multi-output (MIMO) gain and phase perspective. We leverage a recently developed MIMO phase concept to revisit several classical stability results of congestion control protocols and enhance this analysis by entangling gain and phase information. This entanglement allows us to study protocols with significant phase lag or networks with delays. Particularly, the gain-phase entanglement is realized through two methods: (1) an explicit method based on frequency partitioning, which yields a set of easily verifiable, distributed stability conditions for typical TCP networks; and (2) an implicit method based on the Davis–Wielandt shell, which refines (1) but is more difficult to verify. Both methods exploit global phase bounds on network switches, resulting in partially decentralized conditions that emphasize phase characteristics. These conditions are advantageous in networks where switches exhibit similar phase responses. The effectiveness of the proposed conditions is demonstrated by a numerical example showcasing the stabilization of a Reno/RED network.</div></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":"179 ","pages":"Article 112435"},"PeriodicalIF":4.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Stabilization of a rotating body–beam by output feedback torque control 用输出反馈转矩控制稳定旋转体梁

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-19 DOI: 10.1016/j.automatica.2025.112446

Xi Xu , Cheng-Zhong Xu , Xueru Fan , Chun-Hai Kou

引用次数: 0

On the properties of monotone functionals for generalizing Bellman Principle 推广Bellman原理的单调泛函的性质

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-19 DOI: 10.1016/j.automatica.2025.112418

Auguste Caen , Jean-Denis Mathias

{"title":"On the properties of monotone functionals for generalizing Bellman Principle","authors":"Auguste Caen , Jean-Denis Mathias","doi":"10.1016/j.automatica.2025.112418","DOIUrl":"10.1016/j.automatica.2025.112418","url":null,"abstract":"<div><div>Dynamic programming is classically used for solving optimal control problems. This approach is based on equating the value function of the problem under study as well as the Bellman Principle. However, despite a sharing common framework, each optimal control problem is addressed independently, depending on the characteristics of the cost function. The objective of this article is to establish a unified approach within the context of deterministic, autonomous dynamics with an infinite horizon. The ultimate purpose is to determine conditions from which an optimal control problem admits a <em>Bellman principle</em>. To achieve this, we introduce a typology composed of three so-called <em>monotone</em> functionals, which encompass typical cost functions met in the literature. Any functional that complies with the properties of one of this class can be used for tackling optimal control problems through Bellman principle. Then, we show that classical functionals used in the literature can be classified in one these classes. Finally, we show how to build a functional according to this typology through a simple problem of optimization.</div></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":"179 ","pages":"Article 112418"},"PeriodicalIF":4.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Model-free stabilization for discrete-time large-scale systems with time-delays 具有时滞的离散大系统的无模型镇定

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-19 DOI: 10.1016/j.automatica.2025.112439

Shuaizheng Lu, Weiming Xiang

引用次数: 0

Model predictive control for tracking with implicit invariant sets 隐式不变集跟踪的模型预测控制

IF 4.8 2区计算机科学

Automatica Pub Date : 2025-06-19 DOI: 10.1016/j.automatica.2025.112436

Irene Luque , Paula Chanfreut , Daniel Limón , José M. Maestre

引用次数: 0

Prescribed-time semi-global output feedback stabilization by a time-varying high-gain observer 时变高增益观测器定时半全局输出反馈镇定