共查询到17条相似文献,搜索用时 171 毫秒
1.
李延波 《计算技术与自动化》2011,30(1):1-4
针对一类含有分布时滞的不确定系统,通过利用Lyapunov稳定性理论和线性矩阵不等式方法进行滑模控制研究.首先,构造滑模控制器,使得系统满足滑模到达条件;其次,通过构造适当的Lyapunov泛函,给出闭环系统渐近稳定的充分条件.该充分条件通过采用虚拟反馈控制思想,结合状态反馈的极点配置方法,转换为线性矩阵不等式的形式,... 相似文献
2.
研究时滞控制系统稳定性优化问题,针对一类含有分布时滞和离散时滞的线性系统,对于解决延时问题,提高控制系统的稳定性能,有重要的理论意义和实际应用价值.根据分布时滞的特殊形式特点,构造了Lyapunov泛函,利用稳定性理论、矩阵不等式分析技巧及积分不等式技术,采用线性矩阵不等式形式的结论.选取了滑模面,构造了滑模控制器,使得系统满足滑模到达条件.可通过构造适当的Lyapunov泛函,利用虚拟反馈控制,采用状态反馈的极点配置方法,给出了闭环系统渐近稳定的充分条件.方法设计了时滞独立的滑模面,并简化了滑模控制器的设计.进行仿真,结果说明了滑模控制能确保时滞系统的稳定性,并验证了方法的有效性. 相似文献
3.
利用一种奇异系统方法讨论了时滞系统的输出反馈滑模控制问题. 时滞系统的非线性项满足范数有界约束.首先,将滑动模态与线性切换面作为一个奇异时滞系统,基于奇异时滞系统的稳定性理论, 给出滑动模态稳定及切换面存在的线性矩阵不等式(Linear matrix inequality, LMI)充分条件.然后,给出使得系统闭环渐近稳定的静态输出反馈滑模控制器的设计方法,此控制器保证闭环 系统有限时间到达切换面.最后,用数值算例验证本文方法的有效性和正确性. 相似文献
4.
讨论了一类非匹配不确定混沌系统的同步问题.基于主动控制思想,提出了一种主动滑模控制策略,使得从任意初始条件出发的不确定混沌系统在有限时间内到达滑模面.利用线性矩阵不等式(LMI)技术设计了一个鲁棒稳定的滑模面,以降低非匹配不确定对系统的影响.给出了线性矩阵不等式形式的稳定滑模面存在的充分条件.通过对Rssler系统的同步仿真,验证了该方法的可行性. 相似文献
5.
6.
一类带有变时滞的广义切换系统的滑模控制 总被引:2,自引:0,他引:2
研究一类具有非匹配不确定性和变时滞的广义切换系统的滑模控制问题.首先,基于Lyapunov稳定性理论和线性矩阵不等式(LMI)技术,针对每个子系统设计对应的积分型滑模面,给出了每个滑动模态方程鲁棒渐近稳定的充分条件;然后,设计了滑模控制器及切换规则,使得闭环系统的状态能够到达滑模面上,产生滑动模态;最后以仿真实例说明了所提出方法的有效性. 相似文献
7.
针对一类不确定切换中立型系统, 设计相应的积分型滑模面. 基于平均驻留时间方法和线性矩阵不等式技术, 给出滑模动力学系统鲁棒指数渐近稳定的时滞相关性判据. 通过设计滑模控制器, 使闭环系统的状态满足到达条件. 数值仿真表明, 所提出的方法是有效可行的.
相似文献8.
针对一类存在时变状态时滞的不确定性系统, 基于全程滑模的思想, 引入一种带状态时滞项的积分型滑模面, 以消除趋近模态, 实现全程滑模控制; 基于一种新颖的自由权矩阵时滞转换模型, 采用线性矩阵不等式(LMI) 的方法给出并证明了滑动模态稳定的充分条件, 降低了保守性; 结合自适应控制思想设计出自适应滑模控制器, 克服了不确定性以及时变的时滞影响.
相似文献9.
针对一类状态和控制输入同时存在具有时滞的Lurie控制系统,利用Lyapunov泛函和线性矩阵不等式(LMI)方法,研究了该系统的渐近稳定和H<,∞>状态反馈控制器的分析与设计,给出系统无记忆渐近稳定且具有H∞性能的一个LMI条件,并通过对受条件约束的线性矩阵不等式的描述,给出系统存在γ-次优状态反馈H<,∞>控制律的... 相似文献
10.
11.
12.
Ming‐Chang Pai 《Asian journal of control》2019,21(5):2290-2300
A new discrete‐time adaptive global sliding mode control (SMC) scheme combined with a state observer is proposed for the robust stabilization of uncertain nonlinear systems with mismatched time delays and input nonlinearity. A state observer is developed to estimate the unmeasured system states. By using Lyapunov stability theorem and linear matrix inequality (LMI), the condition for the existence of quasi‐sliding mode is derived and the stability of the overall closed‐loop system is guaranteed. Finally, simulation results are presented to demonstrate the validity of the proposed scheme. 相似文献
13.
This paper deals with the robust control problem for a class of uncertain nonlinear networked systems
with stochastic communication delays via sliding mode conception (SMC). A sequence of variables obeying Bernoulli
distribution are employed to model the randomly occurring communication delays which could be different for different
state variables. A discrete switching function that is different from those in the existing literature is first proposed. Then,
expressed as the feasibility of a linear matrix inequality (LMI) with an equality constraint, sufficient conditions are derived
in order to ensure the globally mean-square asymptotic stability of the system dynamics on the sliding surface. A discretetime
SMC controller is then synthesized to guarantee the discrete-time sliding mode reaching condition with the specified
sliding surface. Finally, a simulation example is given to show the effectiveness of the proposed method. 相似文献
14.
Ming-Chang Pai 《International journal of systems science》2013,44(12):1501-1510
This article presents a discrete-time sliding mode control method for the robust stabilisation of linear uncertain multi-input discrete-time systems with state and input delays. The systems are assumed to have structured mismatched time-varying parameter uncertainties. A specified switching surface is proposed and a sliding mode controller is derived to ensure the existence of the quasi-sliding mode. Based on the improved Lyapunov function and linear matrix inequality technique, delay-independent sufficient conditions for the design of a stable switching surface are given and the stability of the overall closed-loop system is guaranteed. Neither chattering phenomenon will occur nor the knowledge of upper bound of uncertainties is required. Finally, simulation results demonstrate the efficacy of the proposed control methodology. 相似文献
15.
考虑一类由局部状态空间Fornasini-Marchesini(FM LSS)第二模型描述的,具有时变状态滞后非线性二维(2-D)离散系统的稳定性分析和控制问题.时变状态滞后项的上、下界为正整数,非线性项满足Lipschitz条件.首先,通过引入一个含有时滞上、下界的新Lyapunov函数,给出了系统的稳定性准则;然后设计了状态反馈控制器以保证系统的稳定性,进而,状态反馈控制律可由线性矩阵不等式求得;最后通过数值算例表明了所得结果的有效性. 相似文献
16.
LMI-Based Sliding Surface Design for Integral Sliding Mode Control of Mismatched Uncertain Systems 总被引:1,自引:0,他引:1
Han Ho Choi 《Automatic Control, IEEE Transactions on》2007,52(4):736-742
We propose a linear matrix inequality (LMI)-based sliding surface design method for integral sliding-mode control of mismatched uncertain systems. The uncertain system under consideration may have mismatched norm bounded uncertainties in the state matrix as well as the input matrix. We give a sufficient condition for the existence of a sliding surface guaranteeing asymptotic stability of the full order sliding mode dynamics. We also give an LMI characterization of the sliding surface, together with an integral sliding mode control law guaranteeing the existence of a sliding mode from the initial time. Additionally, we give an LMI condition of sliding surfaces guaranteeing the alpha-stability constraint. Finally, we give a simulation result to show the effectiveness of our method 相似文献
17.
滑模控制一类非线性分布式时滞系统 总被引:1,自引:0,他引:1
针对一类状态不可测的非线性不确定分布式时滞系统, 给出了系统滑动模态鲁棒渐近稳定的充分条件. 设计了一类滑模观测器, 同时采用线性矩阵不等式的处理方法给出了该观测器存在的充分条件. 再应用滑模控制的趋近率方法和基于观测器所得到的估计状态, 综合了一类滑模控制器. 该控制器同时保证了估计状态下的滑模面和估计误差状态下的滑模面的渐近可达性. 相似文献