共查询到17条相似文献,搜索用时 171 毫秒
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研究了具有随机网络诱导时延且数据包丢失服从马尔可夫链的网络化系统的保性能控制问题.将网络化控制系统建模为具有两种运行模式的马尔可夫跳变线性系统.根据马尔可夫跳变线性系统理论,给出了网络化系统状态反馈保性能控制器存在的充分条件;该保性能控制器为一组线性矩阵不等式的解.通过一个仿真示例说明了本文所提方法的有效性. 相似文献
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针对一类具有随机时延的网络控制系统(NCSs)周期反馈控制问题,提出一个新颖的马尔可夫随机时滞系统模型.该模型包括一个分段常数广义采样保持函数(PCGSHF)以及一个用于描述网络诱导时延和数据包丢失的马尔可夫链.应用李亚普诺夫方法以及线性矩阵不等式技术得到了闭环 NCSs 随机稳定的充分条件,并给出了状态反馈控制器和 PCGSHF 的设计方法.最后,通过仿真算例验证了设计方法的有效性. 相似文献
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一类随机时延网络化控制系统的容错控制研究 总被引:12,自引:0,他引:12
将一类具有随机时延的网络化控制系统建模为具有马尔可夫延迟特性的离散跳变线性系统.借助跳变线性系统理论和容错控制的思想,研究了随机时延网络化控制系统的执行器失效问题.仿真结果验证了所提方法的有效性. 相似文献
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具有长时延及丢包的网络控制系统稳定性分析 总被引:3,自引:0,他引:3
研究了同时具有大于一个采样周期的随机传输时延及数据包丢失的网络控制系统的稳定性问题.对于给定的数据包丢失率,网络控制系统被建模为具有两个事件速率约束的异步动态系统,利用异步动态系统理论给出了网络控制系统指数稳定的充分条件,状态反馈控制器可通过解一组矩阵不等式求出.仿真示例验证了所提出方法的有效性. 相似文献
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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
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This paper is concerned with the stability analysis and stabilization of networked discrete-time and sampled-data linear systems
with random packet losses. Asymptotic stability, mean-square stability, and stochastic stability are considered. For networked
discrete-time linear systems, the packet loss period is assumed to be a finite-state Markov chain. We establish that the mean-square
stability of a related discrete-time system which evolves in random time implies the mean-square stability of the system in
deterministic time by using the equivalence of stability properties of Markovian jump linear systems in random time. We also
establish the equivalence of asymptotic stability for the systems in deterministic discrete time and in random time. For networked
sampled-data systems, a binary Markov chain is used to characterize the packet loss phenomenon of the network. In this case,
the packet loss period between two transmission instants is driven by an identically independently distributed sequence assuming
any positive values. Two approaches, namely the Markov jump linear system approach and randomly sampled system approach, are
introduced. Based on the stability results derived, we present methods for stabilization of networked sampled-data systems
in terms of matrix inequalities. Numerical examples are given to illustrate the design methods of stabilizing controllers. 相似文献
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Yue Long 《International journal of systems science》2013,44(6):1150-1159
This article addresses the stochastic fault detection (SFD) problem in finite-frequency domain for a class of networked control systems (NCSs) with respect to signal quantisation and data packet dropout. Considering a logarithmic quantiser and Markovian packet dropout, the NCS is modelled as a Markov jump linear system (MJLS) with quantisation error. Further, a new definition of finite-frequency stochastic H ? index is given, which gives a measurement of sensitivity. Subsequently, sufficient conditions are derived to guarantee that the MJLS can achieve such a performance. By virtue of the obtained conditions, the fault detection filters (FDFs) are designed in finite-frequency domain, which are valid in characterising the disturbance attenuation performance and finite-frequency fault sensitivity performance. Finally, a simulation example is given to illustrate the method and its effectiveness. 相似文献
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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