共查询到17条相似文献,搜索用时 125 毫秒
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不确定关联大系统的最优保成本控制 总被引:1,自引:0,他引:1
研究了一类具有数值界不确定性关联大系统的最优分散保成本控制。利用线性矩阵不等式(LMI),给出了状态反馈最优分散保成本控制律的存在条件,并将最优分散保成本控制器的设计归结为线性矩阵不等式的求解。在求解矩阵不等式的算法上提出了一种迭代LMI算法,该迭代LMI算法引入了同伦算法的思想并结合了此类控制系统自身的特点,同时给出了一种新的权矩阵选择方法。通过迭代LMI算法和选取适当的权矩阵降低了控制器设计的保守性且获得了更优的二次性能指标上界。最后通过数值例子证明了该算法的有效性且具有更小的保守性。 相似文献
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本文利用线性矩阵不等式 (LMI)方法 ,讨论了一类存在执行器故障不确定连续系统的保性能控制问题 ,给出了故障时系统保性能状态反馈控制器存在的充分条件并应用基于LMI的凸优化方法实现了针对系统故障的最优保性能状态反馈控制器设计。仿真实例验证了该方法的有效性。 相似文献
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Passivity-based decentralized stabilization of multi-agent systems with uncertainty and mixed delays
In this paper, we investigate a decentralized stabilization problem of uncertain multi-agent systems with mixed delays including discrete and distributed time-varying delays based on passivity stability. We design a decentralized state-feedback stabilization scheme such that the family of closed-loop feedback subsystems enjoys the delay-dependent passivity stability for each subsystem. Then, by employing a new Lyapunov-Krasovskii function, a linear matrix inequality (LMI) approach is developed to establish the delay-dependent criteria for the passivity stability of multi-agent systems. The sufficient condition is given for checking the passivity stability. The proposed LMI result is computationally efficient. An example is given to show the effectiveness of the method. 相似文献
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In this paper, the static output feedback decentralized stabilization problem is addressed using a linear matrix inequality approach. A necessary and sufficient condition for static output feedback decentralized stabilizability is derived for linear time-invariant large-scale systems. It is proven that the existence of a stabilizing decentralized gain is equivalent to that of the solution of a quadratic matrix inequality. The extension of the result to
control is studied. An iterative LMI algorithm based on the linear matrix inequality technique is proposed to obtain the decentralized feedback gain. Examples show the effectiveness of the algorithm. 相似文献
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The robust stability and robust stabilization for time‐delay discrete singular systems with parameter uncertainties is discussed. A delay‐dependent linear matrix inequality (LMI) condition for the time‐delay discrete systems to be nonsingular and stable is given. Based on this condition and the restricted system equivalent transformation, the delay‐dependent LMI condition is proposed for the time‐delay discrete singular systems to be admissible. With this condition, the problems of robust stability and robust stabilization are solved, and the delay‐dependent LMI conditions are obtained. Numerical examples illustrate the effectiveness of the method given in the paper. Copyright © 2009 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献
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In this note, sufficient conditions for H/sub /spl infin// output feedback stabilization of linear discrete-time systems are proposed via linear matrix inequalities (LMIs). In order to reduce conservatism existing in earlier LMI methods, auxiliary slack variables with structure are employed. It is shown that degree of freedoms by the introduction of auxiliary slack variables lead to more flexibility in obtaining an approximate solution of H/sub /spl infin// output feedback stabilization problems. Consequently, the proposed method can yield a less conservative result than earlier LMI methods. In particular, typical output feedback control problems, such as decentralized H/sub /spl infin// output feedback control and simultaneous H/sub /spl infin// output feedback control, can be more efficiently solved. Numerical examples are included to illustrate the advantages of the proposed LMI method. 相似文献
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