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排序方式: 共有96条查询结果,搜索用时 140 毫秒
1.
线性不确定系统的稳定控制鲁棒界和多级稳定鲁棒控制   总被引:6,自引:0,他引:6  
利用李雅普诺夫稳定性理论研究了线性不确定系统的稳定鲁棒控制问题,得到结果“任何一个稳定控制都是具有一定稳定鲁棒界的稳定控制”.进一步地,根据系统的不确定量的范围,设计了多级稳定鲁棒控制策略.最后给出一个例子说明设计步骤的可行性.  相似文献
2.
Robust control of base-isolated structures under earthquake excitation   总被引:5,自引:0,他引:5  
We propose the use of robust control in conjunction with base isolation in order to assure arbitrarily small motion of a seismically excited structure. The proposed method requires control force application only at the base (first) floor. The efficacy of the scheme is illustrated by extensive simulations for a prototype six-story building.This paper is based on research supported, in part, by the NSF and AFOSR.  相似文献
3.
The problem of the decentralized robust control is considered for a class of large-scale time-varying systems withdelayed state perturbations and external disturbances in the interconnections. Here, the upper bounds of the delayed stateperturbations and external disturbances in the interconnections are assumed to be unknown. Adaptation laws areproposed to estimate such unknown bounds; by making use of the updated values of the unknown bounds, decentralized linear and nonlinear memoryless robust state feedback controllers are constructed. Based on Lyapunov stability theoryand Lyapunov–Krasovskii functionals, as well as employing the proposed decentralized nonlinear robust state feedback controllers, it is shown that the solutions of the resulting adaptive closed-loop large-scale time-delay system can be guaranteed to be uniformly bounded and that the states converge uniformly and asymptotically to zero. It is also shown that the proposed decentralized linear robust state feedback controllers can guarantee the uniform ultimate boundedness of the resulting adaptive closed-loop large-scale time-delay system. Finally, a numerical example is given to demonstrate the validity of the results.  相似文献
4.
具有输入时滞的时滞关联不确定系统的鲁棒分散控制   总被引:2,自引:0,他引:2  
研究了一类同时具有输入时滞以及不确定参数的时滞关联大系统的稳定性问题.基于所谓的还原法,给出一种新的状态反馈控制器的设计方法,这种方法的不同之处在于利用了时延的大小以及反馈控制的历史信息.根据Lyapunov稳定性理论得到了系统在控制器作用下稳定的充分条件,所有条件都化成可解的标准LMIs(Linear matrix inequalities)形式.文章最后给出了一个数值例子说明本文结果的可行性.  相似文献
5.
Differential game formulations provide an adequate basis for a guidance law synthesis against highly maneuvering targets. This paper deals with a guidance law based on a linear-quadratic differential game formulation. This guidance law has many attractive properties: it is continuous, linear with respect to the state variables, and its gain coefficients can be precalculated offline. Nevertheless, due to the lack of hard control constraints in the formulation, the magnitude of the control can exceed the admissible level imposed by the nature of the problem. In this paper, the upper bound of the interceptor control is obtained depending on the system parameters and the penalty coefficients of the game performance index. It is shown that the interceptor can guarantee an arbitrarily small miss distance without exceeding the control constraints if it has sufficient maneuverability and if the penalty coefficients are chosen properly. By manipulating the penalty coefficients, it is possible to reduce significantly the maneuverability requirements compared to the case of zero interceptor penalty coefficient.  相似文献
6.
This paper deals with the problem of designing output feedback controllers for linear uncertain continuous-time and discrete-time systems with circular pole constraints. The uncertainty is assumed to be norm bounded and enters into both the system state and input matrices. We focus on the design of a dynamic output feedback controller that, for all admissible parameter uncertainties, assigns all the closed-loop poles inside a specified disk. It is shown that the problem addressed can be recast as a convex optimization problem characterized by linear matrix inequalities (LMI); therefore, an LMI approach is developed to derive the necessary and sufficient conditions for the existence of all desired dynamic output feedback controllers that achieve the specified circular pole constraints. An effective design procedure for the expected controllers is also presented. Finally, a numerical example is provided to show the usefulness and applicability of the present approach.  相似文献
7.
不确定非线性系统的鲁棒自适应控制器   总被引:2,自引:1,他引:1       下载免费PDF全文
在backstepping程序中,把非线性自适应控制和鲁棒控制连接起来,为参数化的严格反馈系统在不确定性存在的情况下,建立了一种鲁棒自适应控制方案.非线性自适应控制被用来处理系统的线性参数化部分,而鲁棒控制通过引进非线性阻尼项被用来处理不确定性部分.与现有的方案不同,作者给出了非线性阻尼项的无限种选择,而不是仅仅一种选择.通过使用一种合适的选择,能够设计一个鲁棒自适应控制器.它不仅能够保证对不确定性的鲁棒性,而且能够使输出误差任意小,以及用较小的控制努力取得较好的性能.  相似文献
8.
一类不确定双线性系统的状态反馈Robust控制   总被引:2,自引:0,他引:2  
本文针对一类含不确定性的双线性系统设计了一种线性状态反馈控制.在一定的条件下,利用改进的李雅普诺夫第二方法关于稳定性的理论,证明了系统的稳定性.并给出例子说明.  相似文献
9.
In this paper, the problems of stochastic stability and robust control for a class of uncertain sampled-data systems are studied. The systems consist of random jumping parameters described by finite-state semi-Markov process. Sufficient conditions for stochastic stability or exponential mean square stability of the systems are presented. The conditions for the existence of a sampled-data feedback control and a multirate sampled-data optimal control for the continuous-time uncertain Markovian jump systems are also obtained. The design procedure for robust multirate sampled-data control is formulated as linear matrix inequalities (LMIs), which can be solved efficiently by available software toolboxes. Finally, a numerical example is given to demonstrate the feasibility and effectiveness of the proposed techniques.  相似文献
10.
广义时变系统的鲁棒容错控制   总被引:1,自引:0,他引:1  
针对广义时变系统的鲁棒容错控制问题,基于矩阵不等式及建立Lyapunov方程的方法,首先,在系统出现执行器故障的情况下,分别给出了两种广义时变系统模型鲁棒镇定的充要条件.接着,在系统出现外部干扰的情况下,给出了相应模型鲁棒镇定的充分条件,同时给出了相应的容错控制器的设计方法.  相似文献
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