Automatica最新文献_第10页

On well-posedness of the leak localization problem in parallel pipe networks 论并行管网中泄漏定位问题的好拟性

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-07-02 DOI: 10.1016/j.automatica.2024.111801

Victor Molnö, Henrik Sandberg

{"title":"On well-posedness of the leak localization problem in parallel pipe networks","authors":"Victor Molnö, Henrik Sandberg","doi":"10.1016/j.automatica.2024.111801","DOIUrl":"https://doi.org/10.1016/j.automatica.2024.111801","url":null,"abstract":"<div><p>With the advent of integrated sensor technology (smart flow meters and pressure sensors), various new numerical algorithms for leak localization (a core element of water distribution system operation) have been developed. However, there is a lack of theory regarding the limitations of leak localization. In this work, we contribute to the development of such a theory by introducing an example water network structure with parallel pipes that is tractable for analytical treatment. We define the leak localization problem for this structure and show how many sensors and what conditions are needed for the well-posedness of the problem. We present a formula for the leak position as a function of measurements from these sensors. However, we also highlight the risk of finding false but plausible leak positions in the multiple pipes. We try to answer the questions of how and when the leaking pipe can be isolated. In particular, we show that nonlinearities in the pipes’ head loss functions are essential for the well-posedness of the isolation problem. We propose procedures to get around the pitfall of multiple plausible leak positions.</p></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0005109824002954/pdfft?md5=5fb1dc1cb9d258a5b0b127a64c390750&pid=1-s2.0-S0005109824002954-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Convergence of NMPC using qLPV embeddings and Taylor extrapolation 利用 qLPV 嵌入和泰勒外推法收敛 NMPC

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-07-01 DOI: 10.1016/j.automatica.2024.111794

Marcelo M. Morato

引用次数: 0

Dynamics of coupled implicit and explicit opinions 隐性和显性意见耦合的动态变化

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-29 DOI: 10.1016/j.automatica.2024.111694

Qi Zhang , Lin Wang , Xiaofan Wang

{"title":"Dynamics of coupled implicit and explicit opinions","authors":"Qi Zhang , Lin Wang , Xiaofan Wang","doi":"10.1016/j.automatica.2024.111694","DOIUrl":"https://doi.org/10.1016/j.automatica.2024.111694","url":null,"abstract":"<div><p>This paper proposes a dual opinions co-evolution model based on the dual attitudes theory in social psychology, where every individual has dual opinions of an object: implicit and explicit opinions. The implicit opinions are individuals’ inner evaluations affected by the experience, while the explicit opinions are external expressions of the evaluations and are influenced by public opinion. We theoretically analyze the dynamics of coupled dual opinions in an adversarial discussion scenario, in which two opposing groups participate in the discussion. We rigorously give a method to grade the degree of individual bias. When individuals have a slight bias, dual opinions reach a consensus, showing the phenomenon of acceptance. When individuals are moderately or even extremely biased, they will exhibit the phenomenon of outward compliance, that is, their publicly explicit opinions conform to public opinion, while implicit opinions will reach a persistent disagreement and even polarization. Our investigation indicates that dual opinions may not be monotone initially but eventually converge monotonically. Besides, we analyze the influence of parameters on the co-evolutionary process and results. Numerical simulations of the dual opinions formation process produce inward and outward conformity phenomena, namely acceptance and compliance.</p></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486620","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

Solving viability problems in dynamic games using individual strategies derived from guaranteed viability kernels: Application to an agricultural cooperative model 在动态博弈中使用从保证生存力内核衍生出的个体策略解决生存力问题：农业合作社模型的应用

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-29 DOI: 10.1016/j.automatica.2024.111752

Sophie Martin , Isabelle Alvarez , François Lavallée

{"title":"Solving viability problems in dynamic games using individual strategies derived from guaranteed viability kernels: Application to an agricultural cooperative model","authors":"Sophie Martin , Isabelle Alvarez , François Lavallée","doi":"10.1016/j.automatica.2024.111752","DOIUrl":"https://doi.org/10.1016/j.automatica.2024.111752","url":null,"abstract":"<div><p>In this paper we address decentralized control problems in the context of sustainable management of discrete-time deterministic dynamical systems. We consider <span><math><mi>N</mi></math></span> players, each with their own controlled dynamical system, which are linked through the dynamics of a global variable. We consider sustainable constraints as constraints in the state space. From this general problem defined in both viability theory and game theory, we define <span><math><mi>N</mi></math></span> viability sub-problems. For each of these, we consider the guaranteed viability kernel, subset of the constraint set where it is possible to maintain the subsystem whatever the strategy of other players. When these kernels are not empty, we propose a general algorithm to compute individual strategies that ensure the sustainability of all. Numerical experiments on a model of agricultural cooperative show the feasibility of our approach and suggest that it can be the basis for the definition of new operating rules when the sustainability constraints cannot be ensured.</p></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486471","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

Almost sure detection of the presence of malicious components in cyber–physical systems 几乎可以确定网络物理系统中是否存在恶意组件

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-28 DOI: 10.1016/j.automatica.2024.111789

Souvik Das , Priyanka Dey , Debasish Chatterjee

{"title":"Almost sure detection of the presence of malicious components in cyber–physical systems","authors":"Souvik Das , Priyanka Dey , Debasish Chatterjee","doi":"10.1016/j.automatica.2024.111789","DOIUrl":"https://doi.org/10.1016/j.automatica.2024.111789","url":null,"abstract":"<div><p>This article studies a fundamental problem of security of cyber–physical systems (CPSs): that of detecting, almost surely, the presence of malicious components in the CPS. We assume that some of the actuators may be <em>malicious</em> while all sensors are <em>honest</em>. We introduce a novel idea of <em>separability</em> of state trajectories generated by CPSs in two situations: those under the nominal no-attack situation and those under the influence of an attacker. We establish its connection to the security of CPSs, particularly in detecting the presence of malicious actuators (if any) in them. As primary contributions, we establish necessary and sufficient conditions for the aforementioned detection in CPSs modeled as Markov decision processes (MDPs). Moreover, we focus on the mechanism of perturbing the pre-determined control policies of the honest agents in CPSs modeled as stochastic linear systems, by injecting a certain class of random process called <em>private excitation</em>; sufficient conditions for detectability and non-detectability of the presence of malicious actuators, assuming that the policies are randomized history-dependent and randomized Markovian, are established. Several technical aspects of our results are discussed extensively.</p></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486618","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

Observers with aperiodic measurements: The simpler the better? 非周期性测量的观测者：越简单越好？

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-27 DOI: 10.1016/j.automatica.2024.111792

Daniel Denardi Huff , Mirko Fiacchini , João Manoel Gomes da Silva Jr.

引用次数: 0

Analysis of sampled-data hybrid integrator-gain systems: A discrete-time approach 采样数据混合积分器增益系统分析：离散时间方法

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-24 DOI: 10.1016/j.automatica.2024.111765

Bardia Sharif , Dirk Alferink , Marcel Heertjes , Hendrik Nijmeijer , Maurice Heemels

引用次数: 0

Adaptive fault-tolerant control for a class of nonlinear multi-agent systems with multiple unknown time-varying control directions 一类具有多个未知时变控制方向的非线性多代理系统的自适应容错控制

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-24 DOI: 10.1016/j.automatica.2024.111802

Xiaoyu Guo , Chenliang Wang , Lu Liu

引用次数: 0

Sampled-data event-triggered control with sampling-independent positive guarantees on inter-event times 采样数据事件触发控制，具有与采样无关的事件间时间正保证

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-24 DOI: 10.1016/j.automatica.2024.111798

Hao Yu , Tongwen Chen

{"title":"Sampled-data event-triggered control with sampling-independent positive guarantees on inter-event times","authors":"Hao Yu , Tongwen Chen","doi":"10.1016/j.automatica.2024.111798","DOIUrl":"https://doi.org/10.1016/j.automatica.2024.111798","url":null,"abstract":"<div><p>To fit with a digital environment in networked control systems, sampled-data event-triggered control (ETC) has been proposed where the event-triggering mechanisms sense and process information only at discrete sampling instants (not necessarily periodically). One deficiency in the previous study on sampled-data ETC is the lack of analysis on transmission performance, which yields the potential occurrence of an undesirable phenomenon that the minimum inter-event time is always equal to the minimum inter-sampling interval, no matter how small the latter is. To overcome this drawback, in this paper, we propose a novel sampled-data ETC scheme such that the lower bounds of inter-event times have sampling-independent positive guarantees. A linear networked control system is considered under observer-based controllers, external disturbances, and multiple communication channels. The improved transmission performance is due to the utilization of dynamic event-triggering conditions and some mean-rate error signals, which are the ratios between network-induced errors and some time-increasing functions. After modeling the closed-loop dynamics into a hybrid system, sufficient conditions on the upper bound of inter-sampling intervals and parameters in ETC are provided to ensure input-to-state stability (rather than its practical version) and sampling-independent positive guarantees simultaneously. Furthermore, a new tradeoff relationship between the sampling and transmission performance is revealed: a faster sampling frequency is conducive to improving inter-event times. Finally, a linearized model of an inverted pendulum is simulated to illustrate the efficiency and feasibility of the obtained results.</p></div>","PeriodicalId":55413,"journal":{"name":"Automatica","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486470","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

Multi-agent reinforcement learning via distributed MPC as a function approximator 通过分布式 MPC 作为函数近似器进行多代理强化学习

IF 4.8 2区计算机科学

Automatica Pub Date : 2024-06-22 DOI: 10.1016/j.automatica.2024.111803

Samuel Mallick, Filippo Airaldi, Azita Dabiri, Bart De Schutter

引用次数: 0