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4th International Conference on Manufacturing Science and Engineering (ICMSE 2013)

作者： Jia, Tang Wuxi Profess Coll Sci & Technol Wuxi Peoples R China

ISBN: (纸本)9783037857243

network control systems have been one of the main research focuses in academia as well as in industry for many decades and have become a multidisciplinary area. With these growing research trends, it is important to consolidate the latest knowledge and information to keep up with the research needs. In this paper, we take network time delay and data package dropout into consideration, and propose a DR model based network control system. After theoretical analysis to our system, we do some simulation experiments to validate the efficiency of the proposed system.

关键词： DR model network control system delay data package dropout

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State estimation for a networked control system with packet delay, packet dropouts, and uncertain observation inS-EandC-Achannels

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OPTIMAL control APPLICATIONS & METHODS 2020年第6期41卷 2094-2114页

作者： Roy, Avinash Kumar Srinivasan, K. Natl Inst Technol Instrumentat & Control Engn Tiruchirappalli Tamil Nadu India

In this work, a minimum variance estimator is designed for a networked system with inherent network imperfections in both sensor to estimator (S-E) and controller to actuator (C-A) channels simultaneously. The channels are affected by packet delays, dropouts, and uncertain observations. These effects are modeled using five Bernoulli distributed random variables. Correlation of noise at neighboring time caused by random delay is avoided by introducing two additional variables in the augmented stochastic model. The developed augmented stochastic model can handle network imperfections in both the S-E and C-A channels simultaneously. A minimum variance recursive linear estimator is designed using an innovation approach and projection theorem. Furthermore, sufficient condition is presented for the existence of steady state property of the proposed estimator. Simulation studies are carried out for the proposed estimator using a numerical example and a single link robot arm. Finally, performance comparison with other popular filters shows the effectiveness of the designed estimator.

关键词： estimation network control system packet delay packet loss projection theorem uncertain observation

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The free-weight matrix approach to event-driven output H∞control of networked control systems

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ASIAN JOURNAL OF control 2020年第5期22卷 2041-2048页

作者： Shen, Binbin Guo, Jing Sun, Liankun Tianjin Univ Polytech Sch Comp Sci & Technol Tianjin 300387 Peoples R China Lab Autonomous Intelligence Technol & Syst Tianjin Peoples R China

This paper puts forward a new free-weight matrix method used to analyse network control systems (NCSs) with the H infinity performance index level based on event-driven control. Firstly, design a relative triggering mechanism contain the measured output for a linear system with external disturbances. Secondly, in order to reduce the conservativeness an appropriate Lyapunov-Krasovskii function is constructed. For the integral term generated after the above functional derivation, the free-weight matrix inequality is selected for scaling. Finally,the sufficient condition that the closed-loop system represented by the linear matrix inequality (LMI) satisfies the H infinity performance index and the solution of the controller are *** validity of the scheme is confirmed by a given numerical case.

关键词： event-driven controller free-weight matrix H infinity performance network control system

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A new error handling algorithm for controller area network in networked control system

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COMPUTERS IN INDUSTRY 2013年第8期64卷 984-997页

作者： Shah, M. B. Nor Husain, A. R. Punekkat, S. Dobrin, R. S. Univ Tekn Malaysia Fac Engn Technol Melaka Malaysia Univ Teknol Malaysia Fac Elect Engn Johor Baharu Malaysia Malardalen Univ Malardalen Real Time Res Ctr Vasteras Sweden

An effective error handling mechanism plays an important role to ensure the reliability and robustness of the application of controller area network (CAN) in controlling dynamic systems. This paper addresses a new online error handling approach or named per-sample-error-counting (PSeC) technique that tends to replace native error handling protocol in controller area network (CAN). The mechanism is designed to manage transmission errors of both sensor and control data in networked control system (NCS) used in controlling dynamic system such that the stability of the feedback system is preserved. A new parameter denoted as maximum allowable number of error burst (MAEB) is introduced in which MAEB is selected based on available bandwidth of the CAN network. MAEB serves as the maximum number of attempt of re-transmission of erroneous data per sample which allows the maximum transmission period to be known and guaranteed for time-critical control system. The efficacy of the proposed method is verified by applying the algorithm on the fourth order inverted pendulum system simulated on Matlab/Truetime simulator and the performance is benchmarked with the existing CAN error management protocol. The simulation run under various systems conditions demonstrate that the proposed method results in superior system performance in handling data transmission error as well as meeting control system requirement. (C) 2013 Elsevier B.V. All rights reserved.

关键词： controller area network (CAN) Error handling network control system

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Extended dissipative analysis and synthesis for network control systems with an event-triggered scheme

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NEUROCOMPUTING 2018年 312卷 34-40页

作者： Li, Meiyu Zhao, Jianli Xia, Jianwei Zhuang, Guangming Zhang, Weihai Liaocheng Univ Sch Math Sci Liaocheng 252000 Peoples R China Shandong Univ Sci & Technol Coll Elect Engn & Automat Qingdao 266590 Peoples R China

This paper considers the problem of extended dissipativity analysis and synthesis for network control systems under an event-triggered scheme, where the extended dissipativity analysis unifies the H-infinity, passivity, dissipativity, and L-2 - L-infinity performance in one framework. Firstly, the proposed system is modeled as a network control system with an suitable event-triggered scheme. Then, by using the improved integral inequality and reciprocally convex inequality technique, sufficient condition to guarantee the extended dissipativity of the network control systems is given in terms of linear matrix inequalities (LMIs). Furthermore, the design of the state feedback controller is also proposed. Finally, numerical examples are given to illustrate the efficiency of the addressed method. (C) 2018 Elsevier B.V. All rights reserved.

关键词： Extended dissipative network control system Event-triggered scheme Stability

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Análise da latência no acesso remoto à redes sem fio industriais por meio de redes privadas seguras

Análise da latência no acesso remoto à redes sem fio indu...

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作者： Hecht, Rodolfo Bruno

Many types of industries require their plants to be located geographically far from the headquarters that control their administrative operations. For example, basic industries such as mining, oil & gas, and energy, which transform raw materials for use in other processes, often have their facilities close to primary sources, thus imposing the need to implement a remote monitoring strategy. Concentrating data for decision making, such as modifying the behavior of remote controllers, is desirable, but requires robust and safe operation. In this sense, Industry 4.0 has, among its challenges, the development of networked control systems that enable remote monitoring and maintenance. Thus, accessing data obtained remotely enables comparison with data from other similar plants, which helps and speeds up decision-making. This work presents a remote interconnection solution between a WirelessHart device network and a remote operator, in a safe and reliable way, through the use of a virtual private network on the Internet. In addition, an end-toend latency analysis is performed, in real time, through strategies of collecting the times in each path between the WirelessHart devices and the remote host. The collected data is statistically treated. Finally, through remote access, sending commands to the WirelessHart device network opens horizons for supervision and remote control of industrial plants is presented at the end of the work. The results obtained allow us to conclude that it is feasible to use remote access through secure private networks whose internal latency is greater than the measured latency interval, through the tool produced in this work, in the location where the remote access is performed. ...

关键词： Latency Sistemas de controle VPN Redes sem fio Automação industrial Remote access Acesso remoto WirelessHART network control system Dissertação

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A Survey on the Application of WirelessHART for Industrial Process Monitoring and control

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SENSORS 2021年第15期21卷 4951-4951页

作者： Devan, P. Arun Mozhi Hussin, Fawnizu Azmadi Ibrahim, Rosdiazli Bingi, Kishore Khanday, Farooq Ahmad Univ Teknol PETRONAS Dept Elect & Elect Engn Seri Iskandar 32610 Perak Malaysia Vellore Inst Technol Sch Elect Engn Vellore 632014 Tamil Nadu India Univ Kashmir Dept Elect & Instrumentat Technol Srinagar 190006 India

Industrialization has led to a huge demand for a network control system to monitor and control multi-loop processes with high effectiveness. Due to these advancements, new industrial wireless sensor network (IWSN) standards such as ZigBee, WirelessHART, ISA 100.11a wireless, and Wireless network for Industrial Automation-Process Automation (WIA-PA) have begun to emerge based on their wired conventional structure with additional developments. This advancement improved flexibility, scalability, needed fewer cables, reduced the network installation and commissioning time, increased productivity, and reduced maintenance costs compared to wired networks. On the other hand, using IWSNs for process control comes with the critical challenge of handling stochastic network delays, packet drop, and external noises which are capable of degrading the controller performance. Thus, this paper presents a detailed study focusing only on the adoption of WirelessHART in simulations and real-time applications for industrial process monitoring and control with its crucial challenges and design requirements.

关键词： automation control system fractional-order control industrial wireless sensor networks network control system process control WirelessHART wireless control

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An Improved GPC Hybrid network control 5

An Improved GPC Hybrid Network Control

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5th International Conference on control and Robotics Engineering (ICCRE)

作者： Wang Jiale Zhang Xuxiu Dalian Jiaotong Univ Sch Elect & Informat Engn Dalian Peoples R China

ISBN: (数字)9781728167916

ISBN: (纸本)9781728167916

Aiming at the problem that the random delay of networked control system (NCS) induces the system performance worse or even unstable, this paper proposes an Improved Generalized Predictive controller (IGPC). Without considering the delay, the IGPC is combined with Proportional differential (PD) controller. A hybrid network predictor is proposed to obtain the multi-step control increment. The fitting algorithm is adopted to avoid the prediction of time delay. The control variable is selected based on the output of the system instead of the variables that calculate by the prediction value of time delay, which can improve the performance of the system control. The simulation results show that this method can effectively improve the effect of time delay on the system, improve the response speed of the system, and reduce the overshoot.

关键词： network control system proportional differential control generalized predictive control time delay

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A Neural network-based Approach for Detection of Time Delay Switch Attack on networked control systems

A Neural Network-based Approach for Detection of Time Delay ...

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Complex Adaptive systems Conference (CAS) on Leveraging AI and Machine Learning for Societal Challenges

作者： Abbasspour, Alireza Sargolzaei, Arman Victorio, Mauro Khoshavi, Navid Florida Int Univ Dept Elect & Comp Engn Miami FL 33199 USA Florida Polytech Univ Dept Elect & Comp Engn Lakeland FL 33805 USA Florida Polytech Univ Dept Comp Sci Lakeland FL USA

Recent improvements in communications have led to the proliferation of networked control systems (NCSs). NCSs are used to increase the efficiency and reliability of these systems. However, these connectivities between agents, sensors, and centralized controllers expose NCSs to a range of faults, failures, delays, and cyber-attacks. Detection of intelligent and new types of attacks such as time delay switched (TDS) attacks is a crucial task in the design of NCSs. The injection of the TDS attack to NCSs has the potential to provoke inefficiency or even cause instability in these systems. The TDS or delay signal attack influences the system by introducing a random delay in the process of transmitting and receiving packets. Due to the connectivity between agents, especially in distributed power grids, the injection of a TDS attack on one agent can propagate to others, which can lead to catastrophic consequences. This paper uses a neural networked-based detection algorithm to estimate the TDS attack in real-time. The performance of the proposed TDS attack detection and estimation are evaluated through simulation for two area power systems. (C) 2020 The Authors. Published by Elsevier B.V.

关键词： Time delay switch attack network control system neural networks load frequency control attack detection

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Target Feedback Loop/Loop Transfer Recover (TFL/LTR) controller applied to networked systems susceptible to Communication Losses 14

Target Feedback Loop/Loop Transfer Recover (TFL/LTR) Control...

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14th Annual IEEE International systems Conference (SysCon)

作者： Silva, Joao Filipe Machado, Jeremias B. Ferreira, Luis Henrique C. Univ Fed Itajuba IESTI UNIFEI Itajuba Brazil

ISBN: (纸本)9781728153650

This paper presents a fault-tolerant controller applied to a system containing communication channels susceptible to data loss. The proposed approach is based on the Target Feedback Loop/Loop Transfer Recover compensator, capable of dealing passively with the general or intermittent loss of the actuator or sensor signal. In this scenario, the controller structure and the calculations necessary for its design are described, as well as the mathematical modeling strategies of the data transfer faults. By employing the designed compensator, the results obtained in the simulations presented in the paper show that the system response remains stable and with proper reference tracking, even against the data loss in the actuator signal.

关键词： Process control network control system TFL/LTR Quadruple-Tank

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