共查询到18条相似文献,搜索用时 62 毫秒
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离散系统输出反馈H∞控制 总被引:2,自引:1,他引:1
研究了离散控制系统输出反馈H∞控制问题,已有方法对于控制系统系数矩阵要求十分严格,给出了采用输出反馈控制的新的控制器设计方法.经由相关的引理,针对不同的离散控制系统得出三个定理,将已有的输出反馈H∞控制的双线性矩阵不等式条件转换为一个线性矩阵不等式条件.可以充分利用线性矩阵不等式凸优化技术解决,输出反馈控制器设计提供更大的可行性,并且对于系统的系数矩阵要求有所降低,在一定程度上放松了已有结果的保守性.同时也说明了方法具有更大的应用范围.最后,一个仿真实例说明了算法的有效性. 相似文献
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研究线性广义系统基于观测器的严格耗散控制器的设计问题。首先利用Lyapunov函数的方法,由矩阵不等式的形式给出满足要求的基于观测器的控制器存在的一个充分条件,保证闭环广义系统容许(即正则、稳定、无脉冲)且严格耗散。进而在上述条件的基础上,通过矩阵缩放技术和矩阵等价变换得到由线性矩阵不等式(LMI)形式给出的满足要求的控制器的存在条件和设计方法。最后给出一个数值算例说明设计方法的有效性及可行性。 相似文献
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对离散广义系统,考虑了关于二次型供给率严格耗散控制问题.建立了严格耗散与扩展严格正实之间的等价性.利用线性矩阵不等式(LMI),给出了离散广义系统严格耗散的充分必要条件,并着重推导了其成立的严格LMI条件.针对输入向量维数等丁状态向量维数的系统,分别利用非严格LMI及严格LMI,讨论了状态反馈下的严格耗散控制问题,并给出控制器的设计方法.也讨论了输入向量维数小于状态向量维数的情况.最后通过仿真算例说明所给方法的有效性和普遍性,同时显示了严格LMI条件在耗散控制问题中,比非严格LMI具有的优势. 相似文献
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考虑线性离散时滞系统的二次型耗散控制问题.对于确定系统,给出渐近稳定且严格二次型耗散的条件和动态输出反馈控制器使闭环系统渐近稳定且严格二次型耗散.对于不确定系统,考虑不确定性具有耗散特性的情形,讨论鲁棒耗散性分析和动态输出反馈鲁棒耗散控制问题.通过构造增广系统,将不确定系统的鲁棒严格二次型耗散分析和设计转化为确定系统的情况.所得结果为离散时滞系统的无源控制和H∞控制提供了统一框架,且为离散时滞系统的分析和设计提供了一种更灵活、保守性更小的方法. 相似文献
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线性多变量系统的鲁棒耗散控制 总被引:2,自引:0,他引:2
Robust quadratic dissipative control for a class of linear multi-variable systems with parameter uncertainties is considered, where the uncertainties are expressed in a linear fractional form. For the nominal system without uncertainties, the equivalence between quadratic dissipativeness and positive realness is established, and conditions are derived for linear systems to be quadratic dissipative. As for uncertain systems, it is shown that the robust quadratic dissipative control problem for the uncertain system can be reduced to the corresponding problem for a related system without uncertainties. The control problem concerned can be solved using LMI approach. The results of the paper unify existing results on H1 control and positive real control and provide a more flexible and less conservative control design method. 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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Robust Dissipative Control for Linear Multi-variable Systems 总被引:1,自引:0,他引:1
SHAO Han-Yong~ 《自动化学报》2005,(3)
Robust quadratic dissipative control for a class of linear multi-variable systems with pa- rameter uncertainties is considered,where the uncertainties are expressed in a linear fractional form. For the nominal system without uncertainties,the equivalence between quadratic dissipativeness and positive realness is established,and conditions are derived for linear systems to be quadratic dissi- pative.As for uncertain systems,it is shown that the robust quadratic dissipative control problem for the uncertain system can be reduced to the corresponding problem for a related system without uncertainties.The control problem concerned can be solved using LMI approach.The results of the paper unify existing results on H_∞control and positive real control and provide a more flexible and less conservative control design method. 相似文献
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The dissipative analysis and control problems for a class of Markov jump non-linear stochastic systems (MJNSSs) are investigated. A sufficient condition for the dissipativity of MJNSSs is given in terms of coupled non-linear Hamilton–Jacobi inequalities (HJIs). Generally, it is difficult to solve the coupled HJIs. In this paper, based on T–S fuzzy model, the dissipative analysis and controller design for MJNSSs is proposed via solving a set of linear matrix inequalities (LMIs) instead of HJIs. Finally, a numerical example is presented to show the effectiveness of the proposed method. 相似文献
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Dengfeng Zhang Zhiquan Wang Shousong Hu 《International journal of systems science》2013,44(2):151-165
Fault-tolerant control is an important issue in practical systems. Based on satisfactory control and estimation theory, a passive fault-tolerant control strategy is proposed for a class of uncertain linear discrete-time systems in this article. Manipulating linear matrix inequality (LMI) technique, robust fault-tolerant state-feedback controllers are designed which take the possible actuator faults and sensor faults into consideration, respectively. The closed-loop systems are guaranteed by the designed controllers to meet the required constraints on regional pole index φ(q, r), steady-state variance matrix X index and control-cost function V 2(u) index simultaneously. Then, whether possible faults occur or not, the closed-loop systems would maintain the three desirable performance indices accordingly. Meanwhile, the consistency of the performance indices mentioned earlier is also discussed for fault-tolerant control. 相似文献