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This paper addresses the state-feedback H2/H-infinity controller design that satisfies D-stability constraints for stochastic systems. Firstly, the concept of regional stability for stochastic systems is defined in linear matrix inequality(LMI) regions; Secondly, the characterization about stochastic D-stability is presented. This paper introduces a new technique to solve the regional stability problem for stochastic systems, which is different from the pole placement technique ever used in deterministic systems. Based on this, in the state-feedback case, mixed H2/H-infinity synthesis with D-stability constraints is discussed via LMI optimization. 相似文献
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This paper addresses the state-feedback H2/H-infinity controller design that satisfies D-stability constraints for stochastic systems. Firstly, the concept of regional stability for stochastic systems is defined in linear matrix inequality(LMI) regions; Secondly, the characterization about stochastic D-stability is presented. This paper introduces a new technique to solve the regional stability problem for stochastic systems, which is different from the pole placement technique ever used in deterministic systems. Based on this, in the state-feedback case, mixed H2/H-infinity synthesis with D-stability constraints is discussed via LMI optimization. 相似文献
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具有时滞的奇异系统H∞控制 总被引:2,自引:0,他引:2
针对具有时滞的奇异系统H∞输出反馈控制问题, 利用Lyapunov泛函方法, 得到闭环系统稳定且具有H∞-范数界γ的充分条件, 基于相应的LMI可行解给出了动态控制器显式表示. 最后, 数值例子表明了该方法的正确性. 相似文献
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对一类线性离散系统, 研究了具有闭环圆盘极点约束的输出反馈H∞ 控制问题. 基于线性矩阵不等式处理方法, 导出了输出反馈控制器的存在条件和设计方法. 和现有方法相比, 本文的方法具有更小的保守性. 相似文献
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网络控制系统的H∞状态反馈控制器设计 总被引:2,自引:1,他引:2
研究了对网络控制系统如何设计H∞状态反馈控制器.这些网络控制系统中存在不确定的网络时延和数据包丢失.当网络时延和连续丢包有界时,可以将系统建模为具有时变输入时滞的系统,利用Lyapunov-Krasovskii泛函,推导出网络控制系统渐近稳定的充分条件.将这些充分条件转化为带等式约束的LMIs,并对他们进行迭代求解,就可以构造H∞控制器.与现有结果相比,在推导稳定性条件时本文对交叉项采取了更紧的界定,并且在设计控制器时无需知道调节参数.因此,本文提出的方法具有更低的保守性.仿真结果说明了本方法的正确性和有效性. 相似文献
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This paper studies the problem of suboptimal state-feedback H-two/H-infinity control of stochastic systems with spectrum constraint. Concretely speaking, a mixed suboptimal H-two/H-infinity controller synthesis together with placing the spectrum into a strip region is considered, which is achieved via solving a convex optimization problem. 相似文献
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考虑Internet网络的时滞、物理量变化复杂、物理约束等因素,将主动队列管理问题(AQM)描述为约束系统的干扰抑制问题,运用约束H1控制理论设计AQM鲁棒控制器.首先将时变且不可准确测量的可用链路容量建模为已知名义常值加上未知时变干扰;同时考虑网络中存在的物理约束,利用双椭圆域方法将时域硬约束转化为一组LMI约束;最后通过求解LMI约束的优化问题得到状态反馈增益,解决网络拥塞控制系统的干扰抑制问题.同时与随机早期检测(RED)和PI算法的仿真结果比较显示,约束H1状态反馈控制器降低了链路容量的不确定性对系统动态特性的影响,提高了AQM算法的鲁棒性. 相似文献
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基于H∞控制理论以及切换系统稳定性理论,对于多输入多输出(MIMO)多模型切换控制系统,提出了一种可以有效抑制抖动和改善瞬态响应性能的鲁棒镇定控制器设计方法.通过引入PI控制思想,根据模型跟踪方法设计了增广状态反馈控制器,并将控制器设计问题转化为方便求解的线性矩阵不等式(LMI).该方法的最大优点是可以很方便的保证多模型切换系统的全局稳定性,同时使得设计的控制器具有较强的鲁棒性.将本文提出的方法应用到某型BTT导弹自动驾驶仪设计中,仿真结果证明了此方法的有效性和优越性. 相似文献
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This paper presents a design method of H2 guaranteed cost (GC) fuzzy controllers for discrete-time nonlinear systems with parameter uncertainties. The Takagi and Sugeno (T-S) fuzzy model with parameter uncertainties is employed to represent an uncertain discrete-time nonlinear system. A sufficient condition for the existence of H2 GC fuzzy controllers is presented in terms of linear matrix inequalities (LMIs). The resulting fuzzy controllers not only guarantee that the closed-loop fuzzy system is quadratically stable, but also provide a guaranteed cost on the H2 performance index. Furthermore, an optimal H2 GC fuzzy controller in the sense of minimizing a bound on the guaranteed cost is provided by means of an LMI optimization procedure. Finally, it is also demonstrated, through numerical simulations on the backing up control of a truck-trailer, that the proposed design method is effective. 相似文献
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Non-fragile state feedback H-infinity control for discrete-time systems with quantized signals 总被引:1,自引:0,他引:1
This paper presents a study on the problem of non-fragile state feedback H-infinity controller design for linear discrete-time systems with quantized signals. The quantizers considered here are dynamic and time-varying. With the consideration of controller gain variations and quantized signals at the same time, a new non-fragile H-infinity control strategy is proposed with updating quantizer's parameters, such that the quantized closed-loop system is asymptotically stable and with a prescribed H-infinity performance bound. An example is presented to illustrate the effectiveness of the proposed control strategy. 相似文献