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焦建民 《计算技术与自动化》2013,(3):6-10
针对一类具有区间时变时滞和线性分式参数不确定性的离散奇异系统, 研究鲁棒稳定性问题。基于Lyapunov稳定性理论, 应用线性矩阵不等式方法, 给出不确定离散奇异时滞系统的新的时滞相关型稳定性准则。所给准则相比于已有一些结果, 包含较少的矩阵变量, 且具有较小的保守性。数值实例表明所得结果的有效性。 相似文献
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研究一类由任意有限多个具有参数不确定性和状态时滞的奇异子系统组成的切换系统的状态反馈鲁棒H∞控制问题。利用Lyapunov函数方法和凸组合技术,给出由矩阵不等式表示的控制器存在的充分条件,并设计了相应的子控制器和切换规则。采用变量替代方法,将该矩阵不等式转化为一组线性矩阵不等式(LMIs)。最后给出电力系统中一个求解状态反馈控制器增益矩阵的仿真算例证明结论的有效性。研究结果表明,通过切换,闭环系统在整个状态空间上的每个点都满足鲁棒H∞性能,而并不要求每个子系统在整个状态空间上都满足鲁棒H∞性能,甚至也不要求其渐近稳定。 相似文献
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不确定因素和时滞是现实控制系统中经常存在的问题,在切换系统中,这种问题尤为突出。而状态反馈和鲁棒控制的加入便有效地解决了这些情况对系统稳定性的影响。本文针对一类存在状态时滞和不确定因素的线性切换系统的状态反馈控制问题,研究在公共Lyapunov函数下,满足特定鲁棒H∞性能时,状态反馈控制器存在的条件和求解方法。运用Schur补引理,得出相应的不等式和定理,并进一步将其转化为线性矩阵不等式(LMIs),利用MATLAB进行仿真证明了结论的有效性。 相似文献
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秦岭 《自动化技术与应用》2008,27(1):10-11
本文主要研究了离散区间系统的稳定性问题,以线性矩阵不等式的形式给出了离散区间系统鲁棒稳定性的充分条件,最后通过仿真验证了该方法是行之有效的。 相似文献
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讨论了线性定常广义系统的稳定性, 给出了这种系统H∞ 范数形式的稳定性判据, 在此基础上, 利用线性矩阵不等式 (LMI)方法讨论了含有不确定参数的线性广义控制系统的鲁棒镇定问题, 并相应地给出了鲁棒镇定控制器的设计. 相似文献
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区间离散广义系统状态反馈鲁棒H∞控制 总被引:2,自引:0,他引:2
讨论了一类区间离散广义系统的状态反馈鲁棒H∞控制问题.在给出区间离散广义系统的等价描述之后,基于系统参数矩阵不等式,得到了问题可解的充分条件,并给出了状态反馈控制器显式表示.所得的控制器保证闭环系统正则,具有因果关系,稳定并且满足给定的H∞性能指标.数值例子说明了该方法的正确性. 相似文献
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The robust stabilization problem for uncertain discrete singular time‐delay systems is addressed in this paper. In terms of strict linear matrix inequality and a finite sum inequality, a delay‐dependent criterion for the nominal systems to be admissible is obtained. Based on the criterion, a state feedback controller, which guarantees that, for all admissible uncertainties, the resulting closed‐loop system is regular, causal and stable, is constructed. An explicit expression for the desired controller is also given. The obtained results include both delay‐independent and delay‐dependent cases. Some numerical examples are introduced to show the effectiveness of the given results. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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为了保证系统的稳定性和解决系统执行器失效的问题,针对一类线性广义时滞不确定系统,研究了在有记忆状态反馈作用下和执行器失效情况下的鲁棒容错控制问题。在采用具有更广泛意义的执行器故障模型下,给出了线性不确定时滞广义系统对执行器故障保持渐近稳定并且满足给定干扰衰减指标的鲁棒控制器的存在条件和设计方法。仿真结果验证了该方法的可行性和正确性。 相似文献
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Jian-Min Jiao 《国际自动化与计算杂志》2012,9(1):8-15
The robust stability and robust stabilization problems for discrete singular systems with interval time-varying delay and linear fractional uncertainty are discussed. A new delay-dependent criterion is established for the nominal discrete singular delay systems to be regular, causal and stable by employing the linear matrix inequality (LMI) approach. It is shown that the newly proposed criterion can provide less conservative results than some existing ones. Then, with this criterion, the problems of robust stability and robust stabilization for uncertain discrete singular delay systems are solved, and the delay-dependent LMI conditions are obtained. Finally, numerical examples are given to illustrate the e?ectiveness of the proposed approach. 相似文献
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研究不确定广义系统的时滞依赖鲁棒镇定问题。利用Lyapunov泛函方法,得到一个线性矩阵不等式(LMIs)形式的时滞依赖稳定与镇定判据。新方法考虑一些以前方法中通常忽略的有用的项,引入一些自由权重矩阵,估计Lyapunov泛函导数的上界;再用凸优化算法,进一步给出状态反馈控制器的设计方法。最后通过两个仿真示例表明了新方法的有效性。 相似文献
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Zheng-Guang Wu Peng Shi Hongye Su Jian Chu 《International journal of systems science》2013,44(11):2095-2106
This article considers the problem of delay-dependent stability analysis for a class of discrete-time singular systems with Markovian jump and time-varying delay. The transition probabilities in Markov chain are assumed to be partially unknown. In terms of linear matrix inequality approach, the delay-dependent criteria are proposed to ensure the underlying system to be regular, causal and stochastically stable. Several numerical examples are given to demonstrate the effectiveness and less conservatism of the obtained results. 相似文献
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This paper investigates the robust stability of discrete‐time singular systems involving nonlinear disturbance and mixed time delays. The mixed time delays are comprised of both discrete and distributed delays. The interval of discrete time delays can be divided into several subintervals, firstly. Then, in terms of linear matrix inequality (LMI), a suitable state feedback controller is designed for discrete‐time singular systems with nonlinear disturbance and mixed time delays, and the overall closed‐loop system is regular, causal and mean square asymptotically stable. Numerical examples are provided to show the usefulness and effectiveness of the proposed methods, and the results derived from our approaches are less conservative than existing ones. Copyright © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献