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This paper addresses the H∞ output feedback control problem for discrete-time systems with actuator saturation. Initially, a constrained H∞ output feedback control approach is presented in the framework of linear matrix inequalities (LMI) optimization. Under certain assumptions on the disturbance energy bound, closed-loop H∞ performance is achieved. Furthermore, the moving horizon strategy is applied to an online management of the control performance so that the closed-loop system can satisfy control constraints in the case of unexpected large disturbances. A dissipation constraint is derived to achieve the moving horizon closed-loop system dissipative. Simulation results show that the constrained H∞ controller works effectively under the disturbance assumption and that the moving horizon H∞ controller can trade-off automatically between satisfying control constraints and enhancing performance. 相似文献
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广义离散时滞系统基于输出反馈的H∞控制 总被引:2,自引:0,他引:2
张建林 《自动化技术与应用》2004,23(6):8-12
本文首先对广义离散时滞系统的稳定性进行了讨论,并将系统的稳定性问题归结为线性矩阵不等式(LMI)的求解,然后在此基础上讨沦了广义离散时滞系统的输出反馈H∞控制问题,得出系统的H∞输出反馈控制律存在的一个充分条件及相应的输出反馈控制律。 相似文献
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主要对非线性离散广义系统的输出反馈H∞控制器的设计问题进行讨论,首先利用广义Lyapunov函数和线性矩阵不等式,对系统的零解E-渐近稳定性问题进行分析,在此条件基础上给出系统零解E-渐近稳定且具有H∞范数约束的充分条件,然后设计系统的输出反馈H∞控制器,使得闭环系统具有同样的性能。 相似文献
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针对一类非线性奇异摄动系统,建立了基于T-S 模糊模型的模糊奇异摄动系统模型.通过李亚普诺夫
方法和Schur 补定理,研究其动态输出反馈H∞控制.将系统动态输出反馈H∞控制器设计归结为求解一组与摄动参
数e 无关的线性矩阵不等式,避免了由e 引起的数值求解的病态问题.所获得的控制器使闭环系统渐近稳定,并达
到了给定的H∞性能指标.该方法适用于标准和非标准非线性奇异摄动系统.仿真实例说明了该方法的有效性 相似文献
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切换线性奇异系统输出反馈容许控制 总被引:5,自引:0,他引:5
The admissibility analysis and robust admissible control problem of the uncertain discrete- time switched linear singular (SLS) systems for arbitrary switching laws are investigated. Based on linear matrix inequalities, some sufficient conditions are given for: A) the existence of generalized common Lyapunov solution and the admissibility of the SLS systems for arbitrary switching laws, B) the existence of static output feedback control laws ensuring the admissibility of the closed-loop SLS systems for arbitrary switching laws and norm-bounded uncertainties. 相似文献
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考虑有限字长影响的离散时间非脆弱H∞滤波 总被引:2,自引:0,他引:2
The nonfragile H_∞filtering problem affected by finite word length (FWL) for linear discrete-time systems is investigated in this paper.The filter to be designed is assumed to be with additive gain variations,which reflect the FWL effects on filter implementation.A notion of structured vertex separator is proposed to deal with the problem and exploited to develop sufficient conditions for the nonfragile H_∞filter design in terms of a set of linear matrix inequalities (LMIs).The design renders the augmented system asymptotically stable and guarantees the H_∞attenuation level less than a prescribed level.A numerical example is given to illustrate the effect of the proposed method. 相似文献
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本文研究了离散时间线性时不变系统的量化动态输出反馈 H 无穷控制问题. 所考虑的动态量化器由动态调节参数和静态量化器组成. 静态量化器范围具有一定的实际意义, 这一点在本文充分考虑. 首先, 在考虑量化误差影响的情况下, 本文给出了既依赖于控制器状态又依赖于系统测量输出的量化控制策略使得闭环系统渐进稳定且具有指定的 H 无穷性能指标. 然后, 在这一结果的基础上, 又提出了基于线性矩阵不等式的迭代的优化算法来优化静态量化器范围, 从而得到能保证系统 H 无穷性能需求且具有最小量化器范围的量化控制策略. 最后通过仿真例子验证了所提出方法的有效性. 相似文献
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不确定时滞模糊系统的鲁棒H∞网络控制 总被引:1,自引:0,他引:1
A robust H_∞networked control method for Takagi-Sugeno (T-S) fuzzy systems with uncertainty and time delay is presented.A state feedback controller is designed via the networked control system (NCS) theory.Sufficient condition for robust stability with H_∞performance is obtained.Network-induced delay in network transmission and packet dropout are analyzed. Simulation result shows the validity of this control scheme. 相似文献
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针对具有两个不同被调输出的一类不确定离散时间系统 ,研究了其 H2 /H∞ 状态反馈保性能控制问题。基于线性矩阵不等式处理方法 ,导出了存在 H2 /H∞ 保性能控制律的充分必要条件 ,并用一个线性矩阵不等式的可行解给出了所有保性能控制律的一个参数化表示。进而 ,通过建立和求解一个凸化问题 ,给出了 H2 /H∞最优保性能控制设计方法。最后 ,通过一个例子说明了本文所提出方法的有效性 相似文献
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This paper presents a new feedback-feedforward configuration for the iterative learning control (ILC) design withfeedback, which consists of a feedback and a feedforward component. The feedback integral controller stabilizes the system,and takes the dominant role during the operation, and the feed-forward ILC compensates for the repeatable nonlinear/unknowntime-varying dynamics and disturbances, thereby enhancing the performance achieved by feedback control alone. As the mostfavorable point of this control strategy, the feedforward ILC and the feedback control can work either independently or jointlywithout making efforts to recongurate or retune the feedforward/feedback gains. With rigorous analysis, the proposedlearning control scheme guarantees the asymptotic convergences along the iteration axis. 相似文献