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本文提出的云控制系统(Cloud control systems, CCSs)是对之前的网络化控制系统(Networked control systems, NCSs)的进一步扩展.目前,物联网(Internet of things, IOT)已经成功应用于实际中,网络化控制技术在其中发挥了关键作用.与此同时,云计算的迅速发展为大数据存储与处理、控制器设计和控制系统性能优化提供了一个完美的平台.可以预见,虽然当前云控制技术的研究和应用还存在许多挑战,但在不久的将来,云控制系统的深入研究将对控制理论的发展和各种实际应用起到积极推动作用. 相似文献
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网络控制系统是通过共享通信网络,在传感器,执行器和控制器之间传输信息,并且在地理位置上分散的系统.回顾了近年来关于网络控制系统在数据包丢失,采样和网络时滞等信道缺陷影响下的稳定性分析问题. 相似文献
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网络控制系统的稳定性分析和研究 总被引:3,自引:3,他引:0
该文针对目前网络控制系统的研究现状,阐述了在网络控制系统的分析和设计中需要明确的几个基本问题。综述了具有时变传输周期、网络调度、数据丢包以及网络时滞时的网络控制系统的建模与各种控制策略问题。尤其是网络控制系统在这些情况下的稳定性研究问题,然后列举了一些具有代表性的网络控制系统稳定性分析的最新结果。在此基础上分析了网络控制系统稳定性分析研究中尚待解决的问题,以及新的研究方向。 相似文献
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This paper is concerned with the absolute stability problem of networked control systems (NCSs) with the controlled plant being Lurie systems (Lurie NCSs), in which the network‐induced delays are assumed to be time‐varying and bounded. First, in consideration of both the time‐varying network‐induced delays and data packet dropouts, the Lurie NCSs can be modeled as a multiple‐delays Lurie system. Then, a delay‐dependent absolute stability condition is established by using the Lyapunov–Krasovskii method. Next, two approaches to controller design are proposed in the terms of simple algebra criteria, which are easily solved via the toolbox in Matlab. Furthermore, the main results can be extended to robust absolute stability of Lurie NCSs with the structured uncertainties, where robust absolute stability conditions and approaches to robust controller design are presented. Finally, two numerical examples are worked out to illustrate the feasibility and the effectiveness of the proposed method. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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Input-to-state stability for networked control systems via an improved impulsive system approach 总被引:1,自引:0,他引:1
This paper presents a novel impulsive system approach to input-to-state stability (ISS) analysis of networked control systems (NCSs) with time-varying sampling intervals and delays. This approach is based upon the new idea that an NCS can be viewed as an interconnected hybrid system composed of an impulsive subsystem and an input delay subsystem. A new type of time-varying discontinuous Lyapunov-Krasovskii functional, which makes full use of the information on the piecewise-constant input and the bounds of the network delays, is introduced to analyze the ISS property of NCSs. Linear matrix inequality based sufficient conditions are derived for ISS of NCSs with respect to external disturbances. When applied to the approximate tracking problem for NCSs, the derived ISS result provides bounds on the steady-state tracking error. Numerical examples are provided to show the efficiency of the proposed approach. 相似文献
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The problem of robust stabilization for a class of uncertain networked control systems (NCSs) with nonlinearities satisfying a given sector condition is investigated in this paper. By introducing a new model of NCSs with parameter uncertainty, network-induced delay, nonlinearity and data packet dropout in the transmission, a strict linear matrix inequality (LMI) criterion is proposed for robust stabilization of the uncertain nonlinear NCSs based on the Lyapunov stability theory. The maximum allowable transfer interval (MATI) can be derived by solving the feasibility problem of the corresponding LMI. Some numerical examples are provided to demonstrate the applicability of the proposed algorithm. 相似文献
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A Switched System Approach to Robust Stabilization of Networked Control Systems with Multiple Packet Transmission 下载免费PDF全文
This paper considers robust stabilization of networked control systems (NCSs) with the problem of multiple packet transmission. Two parts of uncertainties are considered in this paper: norm‐bounded parameter uncertainties in the plant, and norm‐bounded parameter uncertainties in the controller. For sensor nodes and actuator nodes communicating through a limited communication channel, we are particularly interested in the case that only one packet containing part of the state information can be transmitted through a toking‐bus every time. Stability of the NCSs with multiple packet transmitted in a periodic manner is closely related to that of periodically switched systems. For NCSs with and without uncertainties in the plant and the controller, stabilizing state feedback controllers are constructed in terms of linear matrix inequalities (LMIs). Numerical examples are given to illustrate the feasibility and effectiveness of the proposed approach. 相似文献
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In this paper, delay-dependent robust stability for a class of uncertain networked control systems (NCSs) with multiple state time-delays is investigated. Modeling of multi-input and multi-output (MIMO) NCSs with networkinduced delays and uncertainties through new methods are proposed. Some new stability criteria in terms of LMIs are derived by using Lyapunov stability theory combined with linear matrix inequalities (LMIs) techniques. We analyze the delay-dependent asymptotic stability and obtain maximum allowable delay bound (MADB) for the NCSs with the proposed methods. Compared with the reported results, the proposed results obtain a much less conservative MADB which are more general. Numerical example and simulation is used to illustrate the effectiveness of the proposed methods. 相似文献
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Yu-Long Wang 《International journal of control》2013,86(11):1709-1719
This article studies the problems of H ∞ output tracking performance analysis and controller design for networked control systems (NCSs) with time delay and packet dropout. By using linear matrix inequality (LMI)-based method, H ∞ output tracking performance analysis and controller design are presented for NCSs with constant sampling period. For NCSs with time-varying sampling period, a multi-objective optimisation methodology in terms of LMIs is used to deal with H ∞ output tracking performance analysis and controller design. The designed controllers can guarantee asymptotic tracking of prescribed reference outputs while rejecting disturbances. The simulation results illustrate the effectiveness of the proposed H ∞ output tracking controller design. 相似文献
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This paper investigates the problem of absolute stability and stabilization for networked control systems (NCSs) with the controlled plant being Lurie systems (Lurie NCSs), in which the network‐induced delays are assumed to be time‐varying and bounded. By considering the relationship between the network‐induced delay and its upper bound, an improved stability criterion for networked control system is proposed. Furthermore, the resulting condition is extended to design a state feedback controller by employing an improved cone complementary linearization (ICCL) algorithm. A numerical example is worked out to illustrate the effectiveness and the benefits of the proposed method. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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Yun-Bo Zhao Jongrae Kim Xi-Ming Sun Guo-Ping Liu 《International journal of systems science》2013,44(11):2119-2129
The sensor-to-controller and the controller-to-actuator delays in networked control systems (NCSs) are investigated for the first time with respect to their different effects on the system performance. This study starts with identifying the delay-independent and delay-dependent control laws in NCSs, and confirms that only two delay-dependent control laws can cause different delay effects in different channels. The conditions under which the different delays in different channels can cause different effects are then given for both delay-dependent control laws. The results are verified by numerical examples. Potentially, these results can be regarded as important design principles in the practical implementation of NCSs. 相似文献
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一种改进的具有非理想网络状况的网络控制系统分析与综合方法 总被引:1,自引:0,他引:1
提出一种改进的具有非理想网络状况, 如时变网络时延和丢包等的网络控制系统分析与综合方法. 在引入具有最新信号选择功能的逻辑零阶保持器和已有的网络系统模型基础上, 采用Lyapunov-Krasovskii泛函方法, 通过引入自由矩阵消除交叉项和利用函数的凸性进行等价变换, 得到保守性较小的效果. 实例表明上述方法的有效性. 相似文献
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信息物理融合系统 总被引:7,自引:1,他引:7
信息物理融合系统 (Cyber-physical system, CPS)是计算、通信和物理过程高度集成的系统,通过在物理设备中嵌入感知、通信和计算能力,实 现对外部环境的分布式感知、可靠数据传输、智能信息处理,并通过反馈机制实现对物理过程的实时控制. 分析了CPS的基本概念和特征,对CPS的体系架构、中间件系统、实时性、安全和隐私等关键技术的现有研究 成果进行综述,并提出了相应的研究思路;然后介绍了一些现有的CPS原型系统和实例,体现出CPS的优越性; 最后对CPS和传感器网络(Wireless sensor network, WSN)、物联网(The internet of things, IOT)、网络控制系统(Networked control systems, NCSs)进行了对比分析,总结了CPS现有研究中存在的问题,并展望了CPS的发展方向. 相似文献
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基于T-S模糊模型非线性网络控制系统改进H∞跟踪控制 总被引:1,自引:0,他引:1
研究一类非线性网络控制系统改进H∞跟踪控制问题, 该类网络控制系统中非线性被控对象和被跟踪对象分别采用Takagi-Sugeno(T-S)模糊模型和线性稳定参考模型描述. 首先通过综合考虑网络中的数据传输时滞和数据丢包影响, 采用输入时滞法和并行分布补偿技术, 建立基于零阶保持器刷新时刻的系统状态跟踪误差模型. 然后利用改进的自由权矩阵方法, 并结合Lyapunov直接法给出系统满足H∞跟踪性能的充分条件以及模糊控制器的设计方法. 最后仿真实例表明本文方法的有效性和相比已有方法的优越性. 相似文献