共查询到19条相似文献,搜索用时 125 毫秒
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参数不确定广义大系统的分散鲁棒镇定控制 总被引:10,自引:0,他引:10
应用线性矩阵不等式(LMI)方法研究了参数不确定广义大系统的分散鲁棒镇定控制问题,系统中不确定项具有数值界,可不满足匹配条件.基干不确定项的表达形式,给出了存在分散鲁棒控制器的LMI条件.仿真例子表明,LMI方法求解简单、便干应用。 相似文献
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采用积分不等式,研究了一类具有状态和输入变时滞的非线性关联不确定系统的鲁棒综合问题.基于线性矩阵不等式(LMI)分别导出了具有扇形角约束和范数有界约束的两类非线性关联不确定系统的线性无记忆状态反馈控制律设计方法,该方法不要求系统的两输入项对系统完全可控.数值实例说明了本文方法的有效性. 相似文献
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本文针对一类结构不确定线性采样系统,研究了鲁棒H∞控制问题,给出了系统鲁棒稳定的充分条件及响应的鲁棒H∞控制律和最优鲁棒H∞控制律,控制律的求取通过借助一类线性矩阵不等式(LMI),或通过求取满足线性矩阵不等式约束的优化问题.仿真结果表明,系统在受到扰动后仍然是稳定的,同时给出了最优性能指标随外部扰动加权矩阵的变化规律. 相似文献
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In this paper, we present a linear matrix inequality (LMI)-based solution to implement H-two and Hinfinity decentralized robust control strategies. Appropriate parametrization of optimal H-two and H-infinity controllers is used. The general formulation of the decentralized control design leads to the optimal determination of both the state feedback gains and the observer gains of the decentralized controllers. This formulation is two folds: first, a centralized controller is obtained, and then, a simplified decentralized solution is derived by optimizing only the observer gains. The mathematical determination of these gains is formulated as an LMI optimization problem that can be easily solved using LMI solvers. As an experimental evaluation of these controllers, a real time application to an aerothermic process is carried out. A continuous-time model of the process obtained with a suitable direct continuous-time identification approach is elaborated. Results illustrating the real performance obtained from the H-two and H-infinity decentralized controllers are discussed and compared with the centralized ones. 相似文献
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考虑一类非线性关联大系统的可靠控制器设计问题,该系统具有常时滞、参数不确定性、非线性扰动和传感器故障.其中参数不确定性满足匹配条件,非线性扰动满足范数有界条件,传感器具有部分失效的模型.本文的目的是设计无记忆分散控制器来镇定该系统.通过解线性矩阵不等式获得此控制器,使得当传感器器发生故障时被控系统能够保持渐近稳定.最后通过仿真的例子,验证该状态反馈控制器的可行性. 相似文献
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This note presents a new extension of the inclusion principle to cope with the problem of designing robust overlapping controllers for state-delayed discrete-time systems with norm bounded uncertainties using the concept of guaranteed cost control. Expansion-contraction relations for systems and contractibility conditions for output guaranteed cost memoryless controllers are proved, including conditions on the equality of guaranteed performance bounds. The controllers are designed in the expanded space using a linear matrix inequality (LMI) delay independent procedure specifically adapted to this class of problems. The designed controllers are then contracted and implemented into the original system. The results are specialized for the overlapping decentralized control design. The method enables an effective construction of block tridiagonal controllers. A numerical illustrative example is supplied 相似文献
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A new approach for design of robust decentralized controllers for continuous linear time‐invariant systems is proposed using linear matrix inequalities (LMIs). The proposed method is based on closed‐loop diagonal dominance. Sufficient conditions for closed‐loop stability and closed‐loop block‐diagonal dominance are obtained. Satisfying the obtained conditions is formulated as an optimization problem with a system of LMI constraints. By adding an extra LMI constraint to the system of LMI constraints in the optimization problem, the robust control is addressed as well. Accordingly, the decentralized robust control problem for a multivariable system is reduced to an optimization problem for a system of LMI constraints to be feasible. An example is given to show the effectiveness of the proposed method. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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不确定性时滞大系统的分散鲁棒H∞控制 总被引:18,自引:0,他引:18
研究一类具有状态时滞的内联不确定性动态大系统的分散鲁棒H∞控制问题.系统
的不确定性参数满足范数有界条件.得到了由无记忆状态反馈分散控制器使每一个子系统和
整个大系统都可镇定且满足给定H∞性能的充分条件.所得结果与系统时滞的大小有关,并
以线性矩阵不等式的形式给出. 相似文献
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不确定时变时滞组合系统的鲁棒分散控制 总被引:4,自引:0,他引:4
研究一类互联项与孤立子系统均含有时变状态时滞的不确定组合系统的状态反馈
鲁棒分散控制问题,利用线性矩阵不等式(LMI)方法设计出线性无记忆状态反馈分散控制
器使受控系统在平衡点处渐近稳定.最后给出的数值例子验证了所给结果的有效性. 相似文献
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This article describes the synthesis of robust decentralized controllers for large-scale discrete-time systems with uncertainties. Based on the Lyapunov method, a sufficient condition for robust stability is derived in terms of a linear matrix inequality (LMI). The solutions of the LMI can be easily obtained using efficient convex optimization techniques. A numerical example is given to illustrate the proposed method. 相似文献