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Less conservative robust reference governors and their applications 不那么保守的稳健型参考调速器及其应用
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-07-08 DOI: 10.1016/j.ejcon.2024.101084
Miguel Castroviejo-Fernandez , Huayi Li , Andrés Cotorruelo , Emanuele Garone , Ilya Kolmanovsky
{"title":"Less conservative robust reference governors and their applications","authors":"Miguel Castroviejo-Fernandez ,&nbsp;Huayi Li ,&nbsp;Andrés Cotorruelo ,&nbsp;Emanuele Garone ,&nbsp;Ilya Kolmanovsky","doi":"10.1016/j.ejcon.2024.101084","DOIUrl":"10.1016/j.ejcon.2024.101084","url":null,"abstract":"<div><p>The applications of reference governors to systems with unmeasured set-bounded disturbances can lead to conservative solutions. This conservatism can be reduced by estimating the disturbance from output measurements and canceling it in the nominal control law. In this paper, a reference governor based on such an approach is considered and time-varying, disturbance and state estimation errors bounding sets are derived. Consequently, the traditional implementation of a reference governor, which exploits a constraint admissible positively-invariant set of constant commands and initial states, is replaced by one which utilizes a time-dependent sequence of similar sets (which are not necessary nested). Examples are reported which include two applications to longitudinal control of aircraft that illustrate handling of elevator uncertainty and wing icing.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101084"},"PeriodicalIF":2.5,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781305","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
Adaptive fuzzy controller design for an air handling unit 空气处理装置的自适应模糊控制器设计
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-07-08 DOI: 10.1016/j.ejcon.2024.101085
Jihua Liu , Jingyu Li , Xiaoping Liu , Cungen Liu , Guangxu Liu , Zhen Xu
{"title":"Adaptive fuzzy controller design for an air handling unit","authors":"Jihua Liu ,&nbsp;Jingyu Li ,&nbsp;Xiaoping Liu ,&nbsp;Cungen Liu ,&nbsp;Guangxu Liu ,&nbsp;Zhen Xu","doi":"10.1016/j.ejcon.2024.101085","DOIUrl":"10.1016/j.ejcon.2024.101085","url":null,"abstract":"<div><p>An adaptive control method based on a fuzzy state observer is designed for air handling unit (AHU) systems, where the intensity of humidity source and heat load are considered to be uncertain, and approximated by fuzzy logics. Besides, the supply air temperature is unmeasurable, which is observed by a state observer. To avoid the system equilibrium point offset, the prediction errors generated by the system and serial-parallel estimation models are introduced into the controller design based on backstepping. Finally, the superiority of proposed adaptive fuzzy controller is analyzed by simulation comparison with feedback linearization and PID controllers in two cases.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101085"},"PeriodicalIF":2.5,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141702093","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
Delayed feedback implementation of decentralized derivative-dependent control of large-scale systems with input delays and disturbed measurements 具有输入延迟和干扰测量的大规模系统的分散导数依赖控制的延迟反馈实施
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-07-08 DOI: 10.1016/j.ejcon.2024.101079
Jin Zhang , Hui Zhang , Emilia Fridman
{"title":"Delayed feedback implementation of decentralized derivative-dependent control of large-scale systems with input delays and disturbed measurements","authors":"Jin Zhang ,&nbsp;Hui Zhang ,&nbsp;Emilia Fridman","doi":"10.1016/j.ejcon.2024.101079","DOIUrl":"10.1016/j.ejcon.2024.101079","url":null,"abstract":"<div><p>We study decentralized derivative-dependent control of large-scale <span><math><mi>n</mi></math></span>th-order systems with input delays via delayed feedback implementation. The unavailable derivatives can be approximated by finite differences giving rise to a time-delayed feedback. In the centralized case, an efficient simple linear matrix inequalities (LMIs)-based method for designing of such static output-feedback and its sampled-data implementation was recently suggested. In the present paper, we extend this design to large-scale systems in the presence of input delays and disturbed measurements. Under the assumption of the stabilizability of the system with small enough input delays and small enough interactions by a state-feedback that depends on the output and its derivatives, a delayed static output-feedback that stabilizes the system is presented by using the current and past disturbed measurements. To compensate the errors due to the input delays, we add the appropriate terms to the corresponding Lyapunov–Krasovskii functional that lead to LMIs conditions. The efficient bounds on the delays preserving that the resulting system is input-to-state stable (ISS) are found by verifying the LMIs. In addition, we employ the vector Lyapunov functional method that may allow larger couplings compared with the existing method. Finally, the effectiveness of the proposed methods is illustrated by numerical examples.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101079"},"PeriodicalIF":2.5,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141630160","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
Event-triggered H∞-fault-tolerant consistency control for multi-agent systems 多代理系统的事件触发 H∞ 容错一致性控制
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-07-05 DOI: 10.1016/j.ejcon.2024.101083
Meng Zhou , Haicheng Li , Jing Wang , Tarek Raïssi
{"title":"Event-triggered H∞-fault-tolerant consistency control for multi-agent systems","authors":"Meng Zhou ,&nbsp;Haicheng Li ,&nbsp;Jing Wang ,&nbsp;Tarek Raïssi","doi":"10.1016/j.ejcon.2024.101083","DOIUrl":"10.1016/j.ejcon.2024.101083","url":null,"abstract":"<div><p>This paper investigates the issue of active fault-tolerant control for multi-agent systems using an event-triggered mechanism, aiming to achieve state-consistency control under a leader–follower framework. The proposed control protocol consists of two main components: leader input estimation and fault tolerant controller design under an event-triggered mechanism. Firstly, a leader–follower error system is constructed, where the leader’s input is considered as a supplementary vector for the system state, resulting in an augmented error system. Then, a distributed state observer is designed for this augmented error system to transform the leader’s input estimation problem into an augmented state estimation issue. Furthermore, an event-triggered mechanism is designed to optimize network communication resources by updating the control law only when specific triggered conditions are met. Next, taking into account the errors introduced by the distributed observer and event-triggered mechanism, the problem of determining the state error feedback gain matrix is transformed into a linear matrix inequality problem using <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>∞</mi></mrow></msub></math></span> robustness design and Lyapunov stability analysis methods. Finally, the effectiveness of this theoretical framework is validated through a practical example involving several VTOLs.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101083"},"PeriodicalIF":2.5,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637728","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
Stochastic maximum principle for optimal control problems with mixed delays and noisy observations 具有混合延迟和噪声观测的最优控制问题的随机最大原则
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-07-02 DOI: 10.1016/j.ejcon.2024.101073
Heping Ma , Yu Shi
{"title":"Stochastic maximum principle for optimal control problems with mixed delays and noisy observations","authors":"Heping Ma ,&nbsp;Yu Shi","doi":"10.1016/j.ejcon.2024.101073","DOIUrl":"https://doi.org/10.1016/j.ejcon.2024.101073","url":null,"abstract":"<div><p>In this paper, we study the optimal control problem for the state governed by stochastic differential equation with delay and partially observed by a noisy process. Some variational inequalities and a necessary condition for optimality are established. Meanwhile, we introduce two kinds of adjoint equation which are shown to be equivalent. As an application, a linear–quadratic system and a financial problem are presented to demonstrate our results. In particular, its numerical simulation and some figures are used to illustrate the effect of delay on optimal solutions.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101073"},"PeriodicalIF":2.5,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141594268","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
Introducing a new nonlinear approach to model heat exchangers designed for control engineering applications 引入新的非线性方法，为控制工程应用设计的热交换器建模
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-07-02 DOI: 10.1016/j.ejcon.2024.101072
Yannick Fürst, Stefan Brandt, Martin Kriegel
{"title":"Introducing a new nonlinear approach to model heat exchangers designed for control engineering applications","authors":"Yannick Fürst,&nbsp;Stefan Brandt,&nbsp;Martin Kriegel","doi":"10.1016/j.ejcon.2024.101072","DOIUrl":"10.1016/j.ejcon.2024.101072","url":null,"abstract":"<div><p>A new low-order dynamic model is proposed to predict the nonlinear heat transfer in heat exchangers, using a modeling approach that does not require detailed information about the flow arrangement. On the primary side, a model of a throttling valve is added to include the control signal’s influence on the secondary side’s output temperature. The model does not consider time delays but uses variable time constants that depend on the mass flow rates. A two-step procedure is proposed to estimate the model parameters: first, the complete parameter vector is estimated to solve a parameter estimation problem. Then, a subset of the estimated parameters is tuned online using an <em>Unscented Kalman Filter</em> to fit the model further to reality. The accuracy of the model as well as the implementation of the parameter estimation are demonstrated using an example from practice.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101072"},"PeriodicalIF":2.5,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0947358024001328/pdfft?md5=ccfc45a4694fe7c19d9b88c4806cb2d8&pid=1-s2.0-S0947358024001328-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Output null controllability for linear time-invariant structured discrete-time systems: A graph theoretic condition 线性时不变结构离散时间系统的输出无效可控性：图论条件
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-06-29 DOI: 10.1016/j.ejcon.2024.101077
Jacob van der Woude , Christian Commault , Taha Boukhobza
{"title":"Output null controllability for linear time-invariant structured discrete-time systems: A graph theoretic condition","authors":"Jacob van der Woude ,&nbsp;Christian Commault ,&nbsp;Taha Boukhobza","doi":"10.1016/j.ejcon.2024.101077","DOIUrl":"https://doi.org/10.1016/j.ejcon.2024.101077","url":null,"abstract":"<div><p>In this paper, we consider a linear time-invariant discrete-time system and study the output null controllability problem, i.e., the problem of steering the output to zero in a finite number of steps. We assume that we only know the structure of the system, i.e., the zero/nonzero location in the system matrices. Hence, we consider a structural version of the output null controllability problem. We represent the structure of the system by means of a directed graph and present a graph theoretic sufficient condition for the problem to be generically solvable. Here generically solvable means that the problem is solvable for almost all systems with the same structure. We illustrate the conditions using an example.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101077"},"PeriodicalIF":2.5,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0947358024001377/pdfft?md5=82e0b00742aca4e6fff91010f97060fe&pid=1-s2.0-S0947358024001377-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
The Indirect Bang-Singular Algorithm (IBSA) for singular control problems with state-inequality constraints 带状态不平等约束的奇异控制问题的间接 Bang-Singular 算法 (IBSA)
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-06-29 DOI: 10.1016/j.ejcon.2024.101071
Amin Jafarimoghaddam, Manuel Soler
{"title":"The Indirect Bang-Singular Algorithm (IBSA) for singular control problems with state-inequality constraints","authors":"Amin Jafarimoghaddam,&nbsp;Manuel Soler","doi":"10.1016/j.ejcon.2024.101071","DOIUrl":"https://doi.org/10.1016/j.ejcon.2024.101071","url":null,"abstract":"<div><p>In this study, we present the Indirect Bang-Singular Algorithm (IBSA), a straightforward computational framework developed to solve a wide range of Singular Optimal Control Problems (SOCP) with state-inequality constraints. The algorithm is a type of arc-classification technique which reformulates the SOCP as a nonlinear programming problem over the switching times, and possibly some other parameters such as the co-states’ initial values at the entry time to a singular interval. We derive the singular control feedback using the Pontryagin’s maximum principle and analyze the possibility of an interval where multiple controls are simultaneously singular. Furthermore, we incorporate the state-inequality constraints using the direct-adjoining method. Owing to the linear property of the co-state dynamics, the co-state variables and consequently, the singular controls are computed automatically using MATLAB’s symbolic platform. The nonlinear programming is constructed in a manner to circumvent the challenges posed by state-inequality constraints in more intricate scenarios involving singular controls expressed in terms of incomplete state-feedback functions. We also present several theorems that are integral to devising a straightforward computational approach for solving SOCPs. To assess the effectiveness of the proposed algorithm, we solve the following novel problems: (1) time–fuel-optimal commercial aircraft cruise flight in a vertical plane (<em>i.e.</em>, with state-inequality constraint, a scalar singular control, and wind shear effects), and (2) the free-routing time–fuel-optimal commercial aircraft flight in a vertical plane (<em>i.e.</em>, with state-inequality constraint, a dual-entry singular control, and wind shear effects). Notably, the optimality of the graphed results has been carefully inspected through first and second-order optimality conditions.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101071"},"PeriodicalIF":2.5,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141606313","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
Exponential stability of system with time delay based on matrix-refined weighted functions 基于矩阵精炼加权函数的时延系统指数稳定性
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-06-29 DOI: 10.1016/j.ejcon.2024.101076
Xiao Ge , Zixuan Wang , Siu-Long Lei , Seakweng Vong
{"title":"Exponential stability of system with time delay based on matrix-refined weighted functions","authors":"Xiao Ge ,&nbsp;Zixuan Wang ,&nbsp;Siu-Long Lei ,&nbsp;Seakweng Vong","doi":"10.1016/j.ejcon.2024.101076","DOIUrl":"10.1016/j.ejcon.2024.101076","url":null,"abstract":"<div><p>Exponential stability of system with time-varying delay is studied in this paper. By taking intermediate polynomials and slack variables, we propose novel matrix-refined weighted functions (MRWFs). Then, based on the MRWFs, we construct a suitable Lyapunov-Krasovskii functional (LKF) and propose an exponential stability condition. Finally, numerical examples verify that the stability condition proposed in this paper is more effective, which is less conservative than some past criteria.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101076"},"PeriodicalIF":2.5,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577014","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
Novel criteria for exponential stability in mean square of stochastic delay differential equations with Markovian switching 马尔可夫切换随机延迟微分方程均方差指数稳定性的新标准
IF 2.5 3区 计算机科学
European Journal of Control Pub Date : 2024-06-28 DOI: 10.1016/j.ejcon.2024.101074
Ky Quan Tran , Pham Huu Anh Ngoc
{"title":"Novel criteria for exponential stability in mean square of stochastic delay differential equations with Markovian switching","authors":"Ky Quan Tran ,&nbsp;Pham Huu Anh Ngoc","doi":"10.1016/j.ejcon.2024.101074","DOIUrl":"10.1016/j.ejcon.2024.101074","url":null,"abstract":"<div><p>This paper addresses the exponential stability in mean square of nonlinear stochastic delay differential equations with Markovian switching. Using a novel approach, we present new explicit criteria for exponential stability in mean square. A discussion and two examples are given to illustrate the effectiveness of our criteria.</p></div>","PeriodicalId":50489,"journal":{"name":"European Journal of Control","volume":"79 ","pages":"Article 101074"},"PeriodicalIF":2.5,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577016","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
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