对于网络控制系统(Networked control systems,NCS)中的随机延迟时变有界,其上界大于一个采样周期的情况,建立了带有动态输出反馈控制器的连续时间系统模型.以此为基础,应用连续时间系统模型离散化与增广状态空间方法,建立了受控于有限...对于网络控制系统(Networked control systems,NCS)中的随机延迟时变有界,其上界大于一个采样周期的情况,建立了带有动态输出反馈控制器的连续时间系统模型.以此为基础,应用连续时间系统模型离散化与增广状态空间方法,建立了受控于有限状态Markov链的离散时间跳变系统模型.在该系统的稳定性控制器设计中,给出了一种求内点法的初始可行解的方法,从而解决了所建模型的可解性问题.理论分析和车载倒立摆上的仿真计算表明,由上述模型与改进算法所给出的动态输出反馈控制器能使系统稳定.展开更多
研究含大测量时滞和噪声的网络控制系统(Networked control systems,NCS)的故障诊断问题,提出一种新的基于无时滞转换方法的最优故障诊断器的设计方法.该方法首先构造一个隐含故障状态的增广系统,并利用无时滞转换方法将含有测量时滞的...研究含大测量时滞和噪声的网络控制系统(Networked control systems,NCS)的故障诊断问题,提出一种新的基于无时滞转换方法的最优故障诊断器的设计方法.该方法首先构造一个隐含故障状态的增广系统,并利用无时滞转换方法将含有测量时滞的网络控制系统转换为无时滞系统.然后给出了故障的可诊断性判据,并利用对偶原理将最优故障诊断器的设计问题转换为状态反馈控制器设计问题.最后,通过构造一种满足二次型性能指标的最优故障诊断器,实现了故障的实时诊断.仿真示例验证了该方法的可行性和有效性。展开更多
In this paper, we present an interval model of networked control systems with time-varying sampling periods and time-varying network-induced delays and discuss the problem of stability of networked control systems usi...In this paper, we present an interval model of networked control systems with time-varying sampling periods and time-varying network-induced delays and discuss the problem of stability of networked control systems using Lyapunov stability theory. A sufficient stability condition is obtained by solving a set of linear matrix inequalities. In the end, the illustrative example demonstrates the correctness and effectiveness of the proposed approach.展开更多
This paper proposes a new method for control of continuous large-scale systems where the measures and control functions are distributed on calculating members which can be shared with other applications and connected ...This paper proposes a new method for control of continuous large-scale systems where the measures and control functions are distributed on calculating members which can be shared with other applications and connected to digital network communications.At first, the nonlinear large-scale system is described by a Takagi-Sugeno(TS) fuzzy model. After that, by using a fuzzy LyapunovKrasovskii functional, sufficient conditions of asymptotic stability of the behavior of the decentralized networked control system(DNCS),are developed in terms of linear matrix inequalities(LMIs). Finally, to illustrate the proposed approach, a numerical example and simulation results are presented.展开更多
文摘对于网络控制系统(Networked control systems,NCS)中的随机延迟时变有界,其上界大于一个采样周期的情况,建立了带有动态输出反馈控制器的连续时间系统模型.以此为基础,应用连续时间系统模型离散化与增广状态空间方法,建立了受控于有限状态Markov链的离散时间跳变系统模型.在该系统的稳定性控制器设计中,给出了一种求内点法的初始可行解的方法,从而解决了所建模型的可解性问题.理论分析和车载倒立摆上的仿真计算表明,由上述模型与改进算法所给出的动态输出反馈控制器能使系统稳定.
文摘研究含大测量时滞和噪声的网络控制系统(Networked control systems,NCS)的故障诊断问题,提出一种新的基于无时滞转换方法的最优故障诊断器的设计方法.该方法首先构造一个隐含故障状态的增广系统,并利用无时滞转换方法将含有测量时滞的网络控制系统转换为无时滞系统.然后给出了故障的可诊断性判据,并利用对偶原理将最优故障诊断器的设计问题转换为状态反馈控制器设计问题.最后,通过构造一种满足二次型性能指标的最优故障诊断器,实现了故障的实时诊断.仿真示例验证了该方法的可行性和有效性。
基金the National Natural Science Foundation of China (No.60674043)
文摘In this paper, we present an interval model of networked control systems with time-varying sampling periods and time-varying network-induced delays and discuss the problem of stability of networked control systems using Lyapunov stability theory. A sufficient stability condition is obtained by solving a set of linear matrix inequalities. In the end, the illustrative example demonstrates the correctness and effectiveness of the proposed approach.
文摘This paper proposes a new method for control of continuous large-scale systems where the measures and control functions are distributed on calculating members which can be shared with other applications and connected to digital network communications.At first, the nonlinear large-scale system is described by a Takagi-Sugeno(TS) fuzzy model. After that, by using a fuzzy LyapunovKrasovskii functional, sufficient conditions of asymptotic stability of the behavior of the decentralized networked control system(DNCS),are developed in terms of linear matrix inequalities(LMIs). Finally, to illustrate the proposed approach, a numerical example and simulation results are presented.
