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Aperiodic sampled-data control of distributed networked control systems with time-delay

TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND control 2021年第9期43卷 1891-1902页

作者： Bansal, Kritika Mukhija, Pankaj Natl Inst Technol Delhi Dept Elect & Elect Engn Delhi 110040 DL India

This paper proposes a hybrid aperiodic sampled-data mechanism for the control of interconnected subsystems with time-delay. The proposed aperiodic sampled-data mechanism comprises of two stages. In the first stage, the next sampling instant for each subsystem is computed using self-triggering strategy. Thereafter, in the second stage, an event-triggering condition is checked at these sampling instants for each subsystem and signal is transmitted to the controller only if the event-triggering condition is violated. Further, to reduce the computational complexity involved in the proposed triggering mechanism, another triggering mechanism with integrated event-triggering and self-triggering is developed. Also, an upper bound on delay for each subsystem is computed to ensure the stability of distributed networked control system. The results proposed are validated using a simulation example. A comparison of the proposed technique with other triggering mechanisms in terms of sampling instants, number of transmissions to the controller, maximum delay bound and other performance measures is drawn through simulation example.

关键词： distributed networked control systems time-delay self-triggered control event-triggered control hybrid-triggering strategy

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IoT-based distributed networked control systems Architecture 23

IoT-based Distributed Networked Control Systems Architecture

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23rd IEEE International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Neves, Carlos F. O. C. Moreno, Ubirajara F. Boava, Adao Univ Fed Santa Catarina Automat & Syst Dept Florianopolis SC Brazil Univ Fed Santa Catarina Dept Engn Blumenau Brazil

ISBN: (纸本)9781538671085

Many technological areas have been affected by the appearance of the Internet of Things (IoT). This phenomenon is happening because applications such as smart cities, smart grids, smart buildings, smart homes, industry, transportation, healthcare and surveillance are being adapted to a new paradigm for adaptability, modularity, heterogeneity, scalability, optimization and decentralization. In this sense, several IoT architectures are being proposed for the applications that are inserted in this new technological development, with the most recent approaches being based on the Software Defined Network (SDN). Therefore, to follow this technological development, there is a need to implement the applications of control systems in this new scenario, which imposes challenges to be overcome, such as nondeterministic networks, latency, jitter, bandwidth, packet loss and interoperability. The focus of this work is on how to combine distributed networked control systems (DNCS) and IoT to meet this new technological context. However, the first step to be taken is to define the topology of IoT-based networked control systems (IoT-DNCS), then develop a suitable system architecture to make control systems via the Internet of Things possible. Therefore, this article aims to propose a problem formulation and a simple and general architecture for IoT-DNCS, specifying the function of each element of the system according to the topology of the problem, and the organization of them to implement the control loops between sensors, controllers and actuators. The architecture proposed in this paper serves as a starting point for studies on new strategies and structures for network and feedback control systems.

关键词： Internet of Things distributed networked control systems Software Defined Network Architecture

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IoT-based distributed networked control systems Architecture

IoT-based Distributed Networked Control Systems Architecture

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IEEE International Conference on Emerging Technologies and Factory Automation

作者： Carlos F. O. C. Neves Ubirajara F. Moreno Adao Boava Automation and Systems Department Federal University of Santa Catarina Florianópolis Brazil Engineering Department Federal University of Santa Catarina Blumenau Brazil

关键词： Internet of Things distributed networked control systems Software Defined Network Architecture

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Robust fault tolerant control of distributed networked control systems with variable structure

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JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS 2016年第12期353卷 2553-2575页

作者： Ge, Yang Wang, Jingcheng Zhang, Langwen Wang, Bohui Li, Chuang Shanghai Jiao Tong Univ Dept Automat 2-213 SEIEE800 Dong Chuan Rd Shanghai 200240 Peoples R China Minist Educ China Key Lab Syst Control & Informat Proc Shanghai 200240 Peoples R China Shanghai Huawei Technol Co Ltd Shanghai 201206 Peoples R China S China Univ Technol Coll Automat Sci & Technol Guangzhou 510641 Guangdong Peoples R China Hainan Univ Sch Mech & Elect Engn Haikou 570228 Peoples R China

This paper studies the robust fault tolerant control problem of distributed network control systems (DNCSs). DNCSs are defined as the networked control systems (NCSs) consist of several sub-systems. Each sub-system contains its own sensor, controller and actuator. This kind of systems widely exist in the real world, such as the urban water supply network, smart grid and so on. Three main aspects of DNSCs are investigated in this paper. Firstly, we consider the variable structure problem of DNCSs. Meanwhile, the network problems including time delays, packet-dropouts and quantization errors are considered. Finally, the actuator fault tolerant control problem due to the possible poor working environment is also studied. A series of two-mode-dependent controllers are proposed to stabilize such DNCSs and meet the robust closed loop performance. By using the Lyapunov Krasovskii (L-K) function, sufficient conditions on the existence of such controllers are presented in terms of bilinear matrix inequalities (BMIs). A cone complementarity linearization (CCL) algorithm is given to solve proposed BMIs. Finally, a simulation example is exploited to show the effectiveness of the proposed method. (C) 2016 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.

关键词： distributed networked control systems Robust control Fault tolerant control Variable structure

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distributed Simultaneous-Fault Tolerant control of distributed networked control systems subject to time-varying delay 33

Distributed Simultaneous-Fault Tolerant Control of Distribut...

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第三十三届中国控制会议

作者： WU Wei FANG Huajing Automation Huazhong University of Science & Technology

ISBN: (纸本)9781479947249

This paper presents a distributed simultaneous-fault tolerant control(SFTC) methodology for detecting and accommodating simultaneous multiple-subsystem faults in distributed networked control systems(DNCSs) subject to time-varying delay,In this distributed SFTC architecture,a fault accommodation(FA) component is designed for each subsystem in the DNCS by using local *** FA component consists of a nominal controller and a fault tolerant *** each controller in the distributed FA components is designed by using adaptive approximation technique.A simultaneous-fault is detected when the state tracking error of any subsystem in the DNCS exceeds the corresponding *** to the detection of a simultaneous-fault,the nominal controller in each FA component is used for counteracting the effect of uncertainty in its corresponding *** the controller in each FA component is reconfigured after simultaneous-fault detection,to compensate for the effect of the local fault in the corresponding *** certain assumptions,the stability properties of the distributed SFTC design are rigorously *** results are reported showing the effectiveness of the proposed methodology.

关键词： distributed simultaneous-fault tolerant control distributed networked control systems simultaneous multiple-subsystem faults time-varying delay

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Robust H-inf control of distributed networked control systems with variable structure and partly networked information 11

Robust H-inf Control of Distributed Networked Control System...

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11th World Congress on Intelligent control and Automation

作者： Ge, Yang Wang, Jingcheng Li, Kang Shanghai Jiao Tong Univ Dept Automat Shanghai Peoples R China Minist Educ China Key Lab Syst Control & Informat Proc Shanghai Peoples R China Queens Univ Belfast Sch Elect Elect Engn & Comp Sci Belfast BT7 1NN Antrim North Ireland

ISBN: (纸本)9781479958252

In this paper, the distributed networked control systems (DNCSs) are considered. The states of each sub-system are divided into the exact local parts and the inexact remote ones, which are transported through a communication network from other sub-systems. Such information will be quantized and may be lost during the transporting. Moreover, variable structure of the DNCSs is also considered and a Markov process is used to model such situation. Based on Lyapunov-Krasovskii (L-K) approach, a mode-based state feedback controller is proposed to stable such DNCSs and to meet the robust H-inf performance in terms of bilinear matrix inequalities (BMIs). Further, a cone complementary algorithm is given. Finally, the proposed method is validated through a simulation example.

关键词： distributed networked control systems variable structure networked information

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Stabilization of distributed networked control systems with Constant Feedback Delay

Stabilization of Distributed Networked Control Systems with ...

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IEEE Annual Conference on Decision and control

作者： Mohammad Razeghi-Jahromi Alireza Seyedi Department of Electrical and Computer Engineering University of Rochester Rochester NY USA Department of Electrical Engineering and Computer Science University of Central Florida Orlando FL USA

ISBN: (纸本)9781467357159

In this paper we study a delay-dependent stability condition for networked control systems with distributed control. We assume a constant processing and communication delay. We use an augmented Lyapunov-Krasovskii functional combined with the Leibniz-Newton formula to find a network stability condition that guarantees the global asymptotical stability of the entire networked control system under delayed feedback. To design the control network, we propose a method involving a constrained quadratic program (QP) and a convex feasibility problem.

关键词： Stabilization distributed networked control systems Constant Feedback Delay

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Sliding Mode Observer-Based Fault Detection of distributed networked control systems with Time Delay

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CIRCUITS systems AND SIGNAL PROCESSING 2012年第1期31卷 203-222页

作者： Zong, Qun Zeng, Fanlin Liu, Wenjing Ji, Yuehui Tao, Yang Tianjin Univ Dept Elect Engn & Automat Tianjin 300072 Peoples R China

This paper considers the fault detection problem of distributed networked control systems (DNCS) with time delay. A sliding mode observer-based fault detection method for a two-level DNCS is presented and two different situations are considered. When all the states of the system are available for measurement, we convert the fault detection problem to a sliding motion stable and reachable problem. When some states of system are not available for measurement, we design a transformation matrix to separate the measurable states and the unknown states, and then different sliding mode observers for those unknown states are developed to achieve fault detection. Finally, a numerical example is provided to illustrate the effectiveness of the proposed method with simulation results.

关键词： Fault detection distributed networked control systems Sliding mode observer Residual evaluation

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Event-triggered output feedback control for distributed networked systems

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ISA TRANSACTIONS 2016年 60卷 294-302页

作者： Mahmoud, Magdi S. Sabih, Muhammad Elshafei, Moustafa King Fahd Univ Petr & Minerals Dept Syst Engn POB 5067 Dhahran 31261 Saudi Arabia

This paper addresses the problem of output-feedback communication and control with event-triggered framework in the context of distributed networked control systems. The design problem of the event triggered output-feedback control is proposed as a linear matrix inequality (LMI) feasibility problem. The scheme is developed for the distributed system where only partial states are available. In this scheme, a subsystem uses local observers and share its information to its neighbors only when the subsystem's local error exceeds a specified threshold. The developed method is illustrated by using a coupled cart example from the literature. (C) 2015 ISA. Published by Elsevier Ltd. All rights reserved.

关键词： distributed networked control systems Output-feedback control Event-triggered control

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Fundamental Issues in networked control systems

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IEEE/CAA Journal of Automatica Sinica 2018年第5期5卷 902-922页

作者： Magdi S.Mahmoud a Mutaz M.Hamdan the systems engineering department king fahd university of petroleum and minerals

Abstract--This paper provides a survey on modeling and theories of networked control systems （NCS）. In the first part, modeling of the different types of imperfections that affect NCS is discussed. These imperfections are quantization errors, packet dropouts, variable sampling/transmission intervals, vari- able transmission delays, and communication constraints. Then follows in the second part a presentation of several theories that have been applied for controlling networked systems. These theories include： input delay system approach, Markovian system approach, switched system approach, stochastic system approach, impulsive system approach, and predictive control approach. In the last part, some advanced issues in NCS including decentral- ized and distributed NCS, cloud control system, and co-design of NCS are reviewed. Index Terms--Decentralized networked control systems （NCS）, distributed networked control systems, network constraints, net- worked control system, quantization, time delays.

关键词： Decentralized networked control systems(NCS) distributed networked control systems network constraints networked control system quantization time delays

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