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1.
In this paper, the stabilization problem for a class of networked control systems (NCSs) with data packet dropouts and transmission time delays is considered, where the delays are time-varying and uncertain, the data packet dropout is modeled as a two-state Markov chain. To compensate the lost packet, a data packet dropout compensator is established. Thus a more realistic model for such NCSs is presented. Sufficient conditions for the stabilization of the new resulting system are derived in the form of linear matrix inequalities (LMIs). Numerical example illustrates the solvability and effectiveness of the results. 相似文献
2.
This paper analyzes the stability of networked control systems (NCSs) with data packet dropout and transmission delays induced by communication channels. Discrete‐time NCSs with data packet dropout and transmission delays are modeled as linear systems with time‐varying delays. Sufficient conditions for the stability of the NCSs are established in terms of linear matrix inequalities (LMIs) by using the Lyapunov function method. The case of NCSs with multiple‐packet transmission is also studied. A numerical example is presented to illustrate our proposed approach. 相似文献
3.
孙业国 《计算机工程与应用》2012,48(21):89-93,122
针对网络控制系统中同时存在时延和丢包问题,基于零阶保持器的工作机制,将同时受时延和丢包影响的网络控制系统建模为输入带有时延的控制系统,根据李雅普诺夫稳定性理论和时滞系统理论得出控制系统的时滞相关稳定性条件,进一步基于锥补线性化的方法给出控制器的设计方法,有效解决了网络控制系统中同时存在时延和丢包的控制问题。仿真算例表明所提方法的有效性。 相似文献
4.
有界丢包网络控制系统的稳定性与能稳性 总被引:3,自引:0,他引:3
主要讨论有界丢包网络控制系统的稳定性与能稳性. 基于迭代方法将有界丢包网络控制系统建模为一个跳变系统. 由于网络的复杂性, 跳变系统状态转移矩阵的部分元素无法获得, 因此, 我们考虑的这种情况更具有一般性. 并且本文考虑的丢包同时存在于前馈和反馈通道. 最后, 数值例子表明本文方法的有效性. 相似文献
5.
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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Wenjun Yan 《Asian journal of control》2013,15(4):1112-1123
This paper investigates the H ∞ control synthesis problem for Lurie networked control systems (NCSs) with multiple time‐varying delays. With the consideration of both network‐induced delays and data packet dropout, Lurie NCSs discussed in this work can effectively be transformed into Lurie control systems with multiple time‐varying delays. In addition, with the non‐uniform distribution characteristics of network delays, based on the delay probability distribution, the stable controller design, and H ∞ synthesis, approaches are derived in the form of linear matrix inequalities (LMIs). Finally, a set of numerical examples are studied, and the results demonstrate the applicability and effectiveness of the suggested approaches. 相似文献
8.
With the integration of communication networks and distributed control in modern manufacturing and process industries, networked control systems (NCSs) are becoming increasingly important due to its simplicity, scalability, flexibility, and cost effectiveness. However, there are still significant technical barriers that limit the applications of NCS technologies. Two challenges are network-induced time delay and data packet dropout. Applying a real-time queuing protocol that we developed recently, we are able to limit the sum of the network-induced communication delay and the control computation delay within a control period. This one-period delay is further guaranteed by well designed compensation for control packet dropout. Then, this paper proposes to compensate for the control packet dropout at the actuator using past control signals. Three model-free strategies for control packet dropout compensation, namely, PD (proportional plus derivative), PD2 (proportional plus up to the second-order derivative), and PD3 (proportional plus up to the third-order derivative) are developed. They are suitable for a large number of NCSs without the need to tune the compensator parameters. The proposed dropout compensation schemes are demonstrated through numerical examples. 相似文献
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In this article, adaptive state feedback stabilising controllers for networked adaptive control systems with unknown actuator failures are developed. The problems of networked control systems (NCSs) such as transmission delays and data-packets dropout, induced by the insertion of data networks in the feedback adaptive control loops are also considered. The novelty of this article consists in the combination of different aspects in NCSs: state tracking control of systems with unknown parameters, unknown actuator failures, network-induced delays and data-packets dropout. Normalised adaptive laws are designed for updating the controller parameters. Sufficient conditions for Lyapunov stability are derived in the case of uncertainty due to actuator failures, delays and data-packets dropout. Simulation results are given to illustrate the effectiveness of our design approach. 相似文献
11.
研究具有时延和数据包丢失的多输入多输出网络控制系统的指数稳定性和控制器设计问题.对在传感器与控制器、控制器与执行器间皆有时延和数据包丢失的网络控制系统结构进行了简化,建立了动态输出反馈网络控制系统模型.基于异步动态系统理论、Lyapunov稳定性原理和线性矩阵不等式方法导出网络控制系统指数稳定的半负定矩阵条件和动态输出反馈控制律设计方法.数值算例说明结果是可行的. 相似文献
12.
Yeguo Sun 《International journal of systems science》2014,45(9):1963-1969
In this paper, the finite-time boundedness and stabilisation problems of a class of networked control systems (NCSs) with bounded packet dropout are investigated. The main results provided in the paper are sufficient conditions for finite-time boundedness and stability via state feedback. An iterative approach is proposed to model NCSs with bounded packet dropout as jump linear systems (JLSs). Based on Lyapunov stability theory and JLSs theory, the sufficient conditions for finite-time boundedness and stabilisation of the underlying systems are derived via linear matrix inequalities (LMIs) formulation. Moreover, both sensor-to-controller and controller-to-actuator packet dropouts are considered simultaneously. Lastly, an illustrative example is given to demonstrate the effectiveness of the proposed results. 相似文献
13.
T.M.P. Gommans W.P.M.H. Heemels N.W. Bauer N. van de Wouw 《International journal of control》2013,86(10):1880-1897
In this paper, we are concerned with the stability analysis and the design of stabilising compensation-based control algorithms for networked control systems (NCSs) that exhibit packet dropouts. In order to increase the robustness against packet dropouts for such NCSs, we propose a new type of model-based dropout compensator, which depends on the local dropout history. Moreover, we provide linear matrix inequality based synthesis conditions for such compensators guaranteeing robust stability. The analysis and design framework includes both worst-case-bound and stochastic models to describe the packet-dropout behaviour in both the sensor-to-controller and the controller-to-actuator channels. Numerical examples demonstrate the significantly improved robustness with respect to packet dropouts using the proposed dropout compensator, compared to using the existing zero strategy and the hold strategy. 相似文献
14.
网络控制系统的H∞状态反馈控制器设计 总被引:3,自引:1,他引:2
研究了对网络控制系统如何设计H∞状态反馈控制器.这些网络控制系统中存在不确定的网络时延和数据包丢失.当网络时延和连续丢包有界时,可以将系统建模为具有时变输入时滞的系统,利用Lyapunov-Krasovskii泛函,推导出网络控制系统渐近稳定的充分条件.将这些充分条件转化为带等式约束的LMIs,并对他们进行迭代求解,就可以构造H∞控制器.与现有结果相比,在推导稳定性条件时本文对交叉项采取了更紧的界定,并且在设计控制器时无需知道调节参数.因此,本文提出的方法具有更低的保守性.仿真结果说明了本方法的正确性和有效性. 相似文献
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研究了包含随机、有界传输时延和丢包的网络控制系统的稳定。将网络控制系统建模为具有时变输入时延的离散时间模型,利用Lyapunov-Krasovskii定理和自由权矩阵法,推导得出基于线性矩阵不等式形式的渐近稳定充分条件。数值仿真验证了方法的有效性。 相似文献
17.
Time delay and packet dropout compensation for networked control systems: a linear estimation method
Yu-Long Wang 《International journal of control》2013,86(1):115-124
This article studies the problem of H ∞ controller design for networked control systems (NCSs) with time delay and packet dropout. A linear estimation-based time delay and packet dropout compensation method is proposed. The delay switching-based method is presented to deal with the variation of time delay, and H ∞ controller design is presented for NCSs with packet dropout compensation by using linear matrix inequality (LMI)-based method. Then the combined delay switching and parameter uncertainty-based method is presented to model the variation of time delay, and H ∞ controller design is also presented. The simulation results illustrate the effectiveness of the newly proposed linear estimation-based time delay and packet dropout compensation. 相似文献
18.
存在时延和数据包丢失情况下状态反馈网络控制系统的指数稳定性 总被引:11,自引:1,他引:11
同时考虑网络诱导时延和数据包丢失以及传感器与控制器、控制器与执行器之间均存在网络的情况,研究了状态反馈网络控制系统的稳定性问题.基于一定的数据包丢失率和恒定时延,系统被建模为由结构事件率约束的异步动态切换系统.利用李亚普诺夫方法和线性矩阵不等式描述,推导出由数据包丢失率约束的系统指数稳定的充分条件,给出了系统指数稳定的容许数据丢包率和系统开环状态及闭环结构的关系,以使系统指数稳定.用Matlab LMI工具箱容易判定系统的指数稳定性,同时获得系统指数稳定的状态反馈控制律.Matlab仿真说明,分析方法是有效的,稳定判据是可行的. 相似文献
19.
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
20.
Dan Huang Sing Kiong Nguang 《International Journal of Control, Automation and Systems》2009,7(5):841-847
This paper investigates the stabilization problem for a class of uncertain networked control systems (NCSs) with random communication
network-induced delays. A dynamic output feedback controller is designed for the uncertain NCSs in the presence of network
effects, i.e., network-induced delays and packet dropouts in both the sensor-controller and controller-actuator channels.
Based on the Lyapunov-Razumikhin method, the existence of such controller is given in terms of the solvability of bilinear
matrix inequalities. An iterative algorithm is proposed to change this non-convex problem into quasi-convex optimization problems,
which can be solved effectively by available mathematical tools. The effectiveness of the proposed design methodology is verified
by a numerical example. 相似文献