一类不确定时滞系统的时滞依赖鲁棒可靠镇定

主要研究了一类状态时滞不确定性线性系统的时滞依赖鲁棒可靠镇定问题,系统状态矩阵和时滞状态矩阵中在着范数有界的时变参数不确定性,故障执行器集合是执行器集合的子集,采用双积分型Lyapunov函数,最终将问题归结为求解LMI,最后给出一个数值例子验证方法的可行性。     

不确定离散时滞系统的输出反馈鲁棒预测控制

对一类输入输出受限的不确定离散时滞系统,研究了使得闭环系统渐近稳定且滚动时域性能指标在线最小化的鲁棒预测输出反馈控制器设计问题.基于预测控制的滚动优化原理,给出了输出反馈控制器存在的充分条件.采用锥补线性化思想将控制器的设计转化为一个受线性矩阵不等式(LMI)约束的非线性规划问题,并利用该线性矩阵不等式的可行解给出了输出反馈控制器的构造方法.最后通过仿真验证了该方法的有效性.     

不确定非线性时滞系统的鲁棒可靠控制

研究一类包含状态时滞的未知非线性扰动项和参数不确定性的不确定时滞系统基于状态观测器的鲁棒可靠控制问题。其中非线性满足范数有界条件,参数不确定性是时变的。目的是设计状态观测器和线性无记忆观测状态反馈控制器,使得对于任意容许的不确定性以及在系统中预先指定的执行器子集合的执行器的失效,相应的闭环系统渐近稳定。最后给出一个数值例子验证了所得结果的有效性。     

不确定离散时间系统鲁棒稳定控制

根据Lyapunov稳定性定理,针对不确定离散时间系统鲁棒稳定状态反馈控制问题,提出一种方法,即通过不确定矩阵秩1分解,计算加权矩阵,沿用线性最优调节器问题的Riccati代数方程,设计鲁棒稳定调节器,并讨论了控制矩阵的不确定程度与鲁棒稳定调节器的存在性关系问题.     

具有时变时滞不确定大系统的鲁棒稳定性判据

研究具有时变时滞的不确定大系统的鲁棒稳定性，利用Lyapunov泛函方法．给出该系统鲁棒稳定的充分性判别条件，并结合算例验证了所得结果的有效性和低保守性。     

不确定时滞广义系统的鲁棒H∞控制

针对不确定连续时滞广义系统,研究了鲁棒H∞控制问题.假设参数不确定性是范数有界的,设计了基于观测器的控制器,使闭环系统满足广义二次稳定和给定H∞性能指标.采用线性矩阵不等式方法,给出了该问题可解的充分条件,该条件对于选择合适的基于观测器的控制器设计方案具有实际指导意义.与已有结论相比,给出的条件中不合有等式限制.最后,给出了应用算例与仿真说明该方法的有效性.     

不确定线性时滞互联大系统的鲁棒镇定

本文考虑了一类不确定线性时滞互联大系统，基于LIM方法给出了系统可鲁棒镇定的充分条件，利用MATLAB的工具箱可以方便的给出该问题的解，具有一定的理论及实际价值。     

一类线性串联时滞不确定系统的鲁棒H∞控制

本文讨论一类具有串联结构的线性不确定系统的鲁棒Ｈ∞控制器,此类系统除状态及控制输入具有滞后特性外,其状态的时滞常数也不相同。文中考虑用分段状态方程描述受控对象,分别设计相应的鲁棒Ｈ∞控制器,并证明了分段设计方法能保证整体系统在Ｈ∞范数界约束下二次型稳定。     

非线性不确定随机多重时滞系统的鲁棒H_∞控制

研究一类非线性不确定随机多重时滞系统的鲁棒 H∞ 控制问题。运用线性矩阵不等式方法 ,导出了满足系统随机鲁棒稳定的充分条件 ,提出实现系统在一定概率意义下干扰衰减鲁棒镇定的鲁棒无记忆控制器设计方法     

不确定动态时滞系统的基于观测器的鲁棒镇定设计

本文研究不确定动时滞系统的基于观测器的鲁棒镇定问题。利用Ｌｙａｐｕｎｏｖ稳定性理论，导出了通过求解两个Ｒｉｃｃａｔｉ方程的状态观测器和线性鲁棒控制器的设计方法。     

Robust H-infinity control for discrete-time T-S fuzzy systems with input delay

Delay-dependent robust H-infinity control for discrete-time Takagi-Sugeno (T-S) fuzzy systems with interval time-varying input delay is considered.By constructing a new Lyapunov-Krasovskii functional and using convex combination method,a delay-dependent condition is established,under which the resulted closed-loop systems via a fuzzy state feedback are robust asymptotically stable with given H-infinity norm bound.Then,an iterative algorithm based on the modified SLPMM algorithm is proposed to solve the fuzz...     

不确定离散时间系统的有限时间预见跟踪控制

研究一类不确定离散时间系统的有限时间鲁棒预见控制问题.与以往对误差信号和系统方程取差分不同,通过引入辅助变量,并用系统状态向量及输入向量与相应辅助变量之差代替通常的状态差分,避免对时变的系数矩阵取差分,使得扩大误差系统的构造成为可能.另外,所推导的扩大误差系统不再包含误差向量,这不仅能降低系统的阶数而且能推广适用对象....     

Robust stabilization of uncertain systems with unknown input delay

This paper is concerned with the robust controller design for uncertain input-delayed systems. The time delay is assumed to be an unknown constant. A controller with delay feedback for the robust stabilization of the system is proposed. The stability criterion of the closed-loop system is derived in terms of linear matrix inequalities (LMIs). Examples show that in many cases our method can give less conservative results than those by the existing methods. Moreover, for the same cases, our controllers have lower feedback gains than the existing ones.     

Robust stabilization of linear discrete-time systems with time-varying input delay

This paper presents a sufficient condition to stabilize linear discrete-time systems with time-varying input delay and model uncertainties. The key idea consists of applying Artstein’s reduction method and the scaled bounded real lemma; the robust stabilization problem is cast as a set of linear matrix inequalities on a transformed delay-free system. Hence, a novel convex characterization of the problem, an alternative to bilinear matrix inequalities in prior literature, is provided. Predictor-based controllers and robust state-feedback stabilization are particular cases of the proposal. Furthermore, numerical examples show that this proposal may improve tolerance against delay variations when compared to other methods available in literature.     

Robust observer-based control for uncertain discrete-time piecewise affine systems

The main contribution of this paper is to present a novel robust observer-based controller design method for discrete-time piecewise affine systems with norm-bounded uncertainties.The key ideas are to ...     

Robust control synthesis for discrete-time uncertain semi-Markov jump systems

This paper studies the control synthesis for uncertain semi-Markov jump systems in a discrete-time domain subjected to external disturbance. The switching between modes is determined by a function of the transition probability and the sojourn-time distribution between two neighbouring modes. Based on the σ-error mean square stability criterion, time-varying controllers are designed to stabilise the system. By constructing a holding time dependent Lyapunov function, time-varying state-feedback controllers are obtained that meet a set of sufficient conditions in the form of linear matrix inequalities. Two examples, including a DC motor system, are presented to show the validity of the proposed control scheme.     

不确定时滞混沌系统的鲁棒控制

针对不确定时滞混沌系统中不稳定不动点的控制需要，应用线性矩阵不等式（LMI）方法，得到了系统存在时滞反馈控制器的充分条件，并利用该控制器对系统中存在的不稳定周期轨道的跟踪问题进行研究。数值仿真结果表明了该方法的有效性。     

Robust adaptive control of uncertain discrete-time state-delay systems

This paper focuses on the controller resilience and performance deterioration issues due to inaccuracies in controller implementation. It addresses the problem of resilient adaptive control problem for a class of discrete-time state-delay systems and norm-bounded uncertainties against controller gain variations. Adaptive control schemes are constructed for the case of known gain perturbation bounds and then extended to accommodate unknown norm-bounded perturbations. Necessary and sufficient conditions for delay-independent asymptotic stability are established. An expanded state-space system called the “Compact Form” is established to derive delay-dependent criteria for stability and adaptive stabilization schemes. All the developed results are conveniently expressed in linear matrix inequalities format. A detailed simulation result is presented to demonstrate the developed theory.     

带不确定时滞的中立型系统之鲁棒非脆弱保性能控制

针对一类动态不确定时滞中立型系统,研究了非脆弱鲁棒保性能控制器设计问题.考虑的中立型系统和状态反馈控制器均具有不确定性.在适当的假设下利用Lyapunov稳定性方法,以线性矩阵不等式的形式,给出了使该动态时滞不确定中立型系统二次稳定及非脆弱鲁棒保性能状态反馈控制器存在的充分条件.通过求解相应的线性矩阵不等式就可得到系统的非脆弱鲁棒保性能控制器,同时也能保证二次性能函数不超过一个确定的界.最后,用数值仿真验证了所给方法的可行性.