Automatica最新文献_第9页

On the existence and neural network representation of separable control Lyapunov functions 可分控制李雅普诺夫函数的存在性及其神经网络表示

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-27 DOI: 10.1016/j.automatica.2025.112517

Mario Sperl, Jonas Mysliwitz, Lars Grüne

引用次数: 0

Differentially private dual gradient tracking for distributed resource allocation 分布式资源分配的差分私有对偶梯度跟踪

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-26 DOI: 10.1016/j.automatica.2025.112521

Wei Huo , Xiaomeng Chen , Lingying Huang , Karl Henrik Johansson , Ling Shi

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引用次数: 0

Convergence analysis of gradient flow for overparameterized LQR formulations 过参数化LQR公式梯度流的收敛性分析

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-25 DOI: 10.1016/j.automatica.2025.112504

Arthur Castello B. de Oliveira , Milad Siami , Eduardo D. Sontag

{"title":"Convergence analysis of gradient flow for overparameterized LQR formulations","authors":"Arthur Castello B. de Oliveira , Milad Siami , Eduardo D. Sontag","doi":"10.1016/j.automatica.2025.112504","DOIUrl":"10.1016/j.automatica.2025.112504","url":null,"abstract":"<div><div>This paper analyzes the intersection between results from gradient methods for the model-free linear quadratic regulator (LQR) problem, and linear feedforward neural networks (LFFNNs). More specifically, it looks into the case where one wants to find an LFFNN feedback that minimizes an LQR cost. It starts by deriving a key conservation law of the system, which is then leveraged to generalize existing results on boundedness and global convergence of solutions, and invariance of the set of stabilizing LFFNNs under the training dynamics (gradient flow). For the single hidden layer LFFNN, the paper proves that the solution converges to the optimal feedback control law for all but a set of Lebesgue measure zero of the initializations. These results are followed by an analysis of a simple version of the problem – the “vector case” – proving the theoretical properties of accelerated convergence and a type of input-to-state stability (ISS) result for this simpler example. Finally, the paper presents numerical evidence of faster convergence of the gradient flow of general LFFNNs when compared to non-overparameterized formulations, showing that the acceleration of the solution is observable even when the gradient is not explicitly computed, but estimated from evaluations of the cost function.</div></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":"182 ","pages":"Article 112504"},"PeriodicalIF":5.9,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893836","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

Partially cooperative robust distributed model predictive control for tracking 跟踪的部分协作鲁棒分布式模型预测控制

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-23 DOI: 10.1016/j.automatica.2025.112547

Ana Sánchez-Amores , Antonio Ferramosca , José M. Maestre , Eduardo F. Camacho

引用次数: 0

Observer-based detection and isolation of permanent sensor faults in a class of uncertain switched affine systems 一类不确定切换仿射系统中传感器永久故障的观测器检测与隔离

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-23 DOI: 10.1016/j.automatica.2025.112526

Diego dos Santos Carneiro , Flávio Andrade Faria , Vilma Alves de Oliveira , Michele Cucuzzella , Antonella Ferrara

{"title":"Observer-based detection and isolation of permanent sensor faults in a class of uncertain switched affine systems","authors":"Diego dos Santos Carneiro , Flávio Andrade Faria , Vilma Alves de Oliveira , Michele Cucuzzella , Antonella Ferrara","doi":"10.1016/j.automatica.2025.112526","DOIUrl":"10.1016/j.automatica.2025.112526","url":null,"abstract":"<div><div>This paper develops a robust fault detection and isolation (FDI) strategy for a class of uncertain continuous-time switched affine systems when the system state is not fully available for measurement, and all system sensors are prone to permanent abrupt bounded faults. The FDI strategy is obtained by designing a number of FDI devices equal to the number of sensors. First, we give linear matrix inequalities conditions to design a bank of full-state Luenberger observers in a pseudo-dedicated scheme with guaranteed <span><math><msub><mrow><mi>S</mi></mrow><mrow><mo>−</mo></mrow></msub></math></span> and <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>∞</mi></mrow></msub></math></span> performances to work as residual error generators (REGs). In the sequence, considering an extension of the concepts of weak and strong detectability and novel concepts of weak and strong isolation, residual evaluation functions are defined, and threshold functions are designed considering the gains and parameters obtained in the REG design, taking into consideration the smallest fault magnitude to be detected to achieve a mixed <span><math><mrow><msub><mrow><mi>S</mi></mrow><mrow><mo>−</mo></mrow></msub><mo>/</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>∞</mi></mrow></msub></mrow></math></span> performance. An Algorithm to determine a piecewise constant threshold function is proposed to obtain less conservative constraints in the optimization problem. Furthermore, parameter-tuning algorithms are proposed to obtain local optima thresholds and REGs to satisfy weak isolation conditions over a range of uncertainties. Finally, a Cuk DC–DC converter is considered to demonstrate the effectiveness of the proposed approach.</div></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":"182 ","pages":"Article 112526"},"PeriodicalIF":5.9,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888924","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

Lifting-based PWA control: A global solution to handle disturbances in the state space partitions 基于提升的PWA控制：处理状态空间分区中干扰的全局解决方案

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-23 DOI: 10.1016/j.automatica.2025.112529

Songlin Yang, Sorin Olaru, Pedro Rodriguez-Ayerbe

引用次数: 0

Adaptive prescribed-time control for nonlinear cascade systems with FxT-ISS inverse dynamics 具有FxT-ISS逆动力学的非线性串级系统的自适应规定时间控制

IF 5.9 2区计算机科学

Automatica Pub Date : 2025-08-23 DOI: 10.1016/j.automatica.2025.112527

Jiangbo Yu , Chengdong Li , Zhengtao Ding , Yuqiang Wu

引用次数: 0

Design of asymmetric Lyapunov functions for global stability in dynamic surface control 动态曲面控制全局稳定性的非对称Lyapunov函数设计