共查询到17条相似文献,搜索用时 125 毫秒
1.
2.
区间矩阵的Hurwitz与Schur鲁棒稳定性检验 总被引:1,自引:0,他引:1
提出基于二维面检验的区间矩阵Hurwitz与Schur鲁棒稳定的充分必要条件。证明区间矩阵的Hurwitz与Schur鲁棒稳定性可由其二维表面的稳定性保证。为证明本文区间矩阵的鲁棒稳定性检验的可应用性,给出了实例。 相似文献
3.
对新一代高性能数控机床研制的整体性性能要求是高速度、高精度、高效率和高可靠性.其关键性的基础和技术之一就是高性能采样伺服控制系统的设计.这类控制系统设计的根本问题是系统鲁棒稳定性的分析.现利用根分布判别方法,对一类具有区间扰动的采样伺服控制系统鲁棒稳定性条件进行了研究,给出了两条鲁棒稳定性判别准则.当系统闭环特征多项式系数呈区间递减性质时,系统鲁棒稳定.这两条判别准则可适用于任意采样控制系统的鲁棒稳定性分析. 相似文献
4.
5.
针对不确定线性连续系统,研究了执行器失效情况下的鲁棒容错H∞控制问题.利用LMI,给出了不确定线性系统对任意执行器故障均保持渐近稳定且满足给定干扰衰减指标的鲁棒容错H∞控制器存在的充要条件,讨论了参数不确定线性系统的鲁棒容错H∞控制器的设计问题.根据凸优化理论,进一步给出了鲁棒容错最优H∞控制器的线性凸优化设计算法和设计步骤.采用所设计的状态反馈控制器,当任意执行器出现故障时,闭环系统仍保持渐近稳定且满足给定的干扰衰减性能指标.数值仿真例子验证了该设计方法的可行性和有效性. 相似文献
6.
在线性系统设计中,需要设计一种调节器使系统具有闭环系统稳定且达到无差调节的性质,在系统参数发生微小扰动时,仍然要求保持这两种性质。设计具有这种性质的调节器的问题,称为鲁棒调节器问题。本文以双机拖动调速系统为例,说明鲁棒调节器的结构及设计方法,这种方法在鲁棒调节器设计中起着重要作用。 相似文献
7.
参数不确定和时滞广泛存在于各种实际的控制系统中,而且它们往往是导致系统不稳定或性能下降的原因。本文基于Lyapunov稳定性理论,通过构造简化的Lyapunov-Krasovskii泛函,同时应用线性矩阵不等式(LMI:linearmatrix inequality)方法,研究了参数不确定和单时变时滞系统的鲁棒稳定性问题,并导出了由LMI表示的该类系统的鲁棒稳定性判据,而且,通过这类简化的L-K泛函,在充分利用时滞信息的基础上减少了判据的保守性。最后借助含不确定性扰动的具有单时变时滞的单机-无穷大系统模型,分析了保持鲁棒稳定时系统可承受的最大时滞的界限,数值仿真验证了方法的有效性。 相似文献
8.
9.
10.
针对传统DEA模型在不确定环境下评价结果不稳定的缺陷,提出了一种改进的鲁棒DEA评价方法,为电网建设和投资规划提供有效的经济指导。该方法采用鲁棒模糊核主成分分析,确定电力系统评价的投入产出指标;考虑投入产出不确定性,利用不确定信息一般化思想和对偶理论构建鲁棒DEA模型。为验证模型效果,采用我国部分省级电力系统的投入产出数据,研究不确定环境下电力系统评价的稳定性,实验表明,鲁棒DEA模型会在效率最优性和求解可靠性之间权衡,当投入产出数据同时面临不确定扰动时,模型仍能保证评价的准确稳定性。 相似文献
11.
本文介绍了兼顾鲁棒性和性能指标的IMC-PID控制器的设计方法,并通过DCS上的组态来实现这种控制算法,使DCS的PID控制算法提升为IMC-PID鲁棒控制算法,使控制系统性能与鲁棒性大为提高.为便于工业应用,提出一种简便的闭环系统辨识算法,与IMC-PID鲁棒控制器设计结合起来,形成一个软件包,将它用于某厂常减压加热炉上,取得很好的控制效果. 相似文献
12.
Performance tuning of robust motion controllers for high-accuracy positioning systems 总被引:2,自引:0,他引:2
Bong Keun Kim Wan Kyun Chung 《Mechatronics, IEEE/ASME Transactions on》2002,7(4):500-514
This paper presents a structural design method of robust motion controllers for high-accuracy positioning systems, which makes it possible to tune the performance of the whole closed-loop system systematically. First, a stabilizing control input is designed based on Lyapunov redesign for the system in the presence of uncertainty and disturbance. And adopting the internal model following control, robust internal-loop compensator (RIC) is proposed. By using the structural characteristics of the RIC, disturbance attenuation properties and the performance of the closed-loop system determined by the variation of controller gains are analyzed. Next, in order to design a robust motion controller for a high performance positioning system, dual RIC structure is proposed and it is shown that if the synthesis of the robust motion control law is performed in the RIC framework, the robust property of RIC can be naturally implanted in the feedback controller. The proposed structural design of robust motion controller provides a systematic approach to the problem of robust stability and performance requirement in the face of uncertainty. Furthermore, by allowing the tradeoffs between robust stability and performance to be quantified in a simple fashion, it can illuminate systematic design procedure of the robust motion controllers. Finally, the proposed method is verified through simulation and the performance is evaluated by experiments using a high-accuracy positioning system. 相似文献
13.
This paper presents a robust stability analysis tool for the two-dimensional (2-D) discrete system by using eigenvalue sensitivity. It includes the 2-D system stability test via one-dimensional (1-D) system robust stability analysis. The merits of this method are fewer computations and good programmability. How to estimate the stability margin, on which the degree of stability and the spatial performance of the system depend, is also an important issue in this paper.Parts of this work have been presented at the IEEE International Conference On Acoustic, Speech, and Signal Processing, 1993 in Minnesota, USA. This work was supported by the National Science Council of the Republic of China under Grant NSC 81-E036-514. 相似文献
14.
本文在时域内研究LMS算法(least mean square algorithm)的稳定性及鲁棒LMS算法的构造.首先将LMS算法表达式转化为标准的离散时间系统状态方程形式,之后运用线性矩阵不等式(LMI)技术对其二次稳定性进行了分析.针对滤波过程中会出现的输入和测量噪声干扰,本文提出了一种兼顾收敛性、鲁棒稳定性以及鲁棒性能的鲁棒LMS算法,最后给出了仿真算例,通过和一般的LMS算法的比较,体现了这种鲁棒LMS算法的优越性. 相似文献
15.
16.
文中研究了一类变时滞区间神经网络的全局指数鲁棒稳定性。取消了变时滞参数为可导函数的假设,通过构造合适的Lyapunov函数,利用Halanay不等式和矩阵范数不等式,得到了一个新颖的区间神经网络全局指数鲁棒稳定的充分条件,该条件与系统的时滞参数无关。根据所得结论,还得到了一个线性矩阵不等式条件,该条件可以用LMI工具箱验证,便于在实际中的应用。最后通过一个数值例子和相应的计算机仿真结果验证了所得结果的有效性。 相似文献
17.
《Mechatronics》2016
A hybrid control strategy for an electro-hydraulic control loading system (EHCLS) of a flight simulator in the presence of a control mechanism kinetic parameter perturbation is proposed to improve the force tracking accuracy and guarantee robust stability of the EHCLS system. A double-loop model of the EHCLS, including the control mechanism and the hydraulic mechanism, is established and analyzed from the force-displacement impedance perspective. A force closed-loop parameter model of the EHCLS is identified by a recursive-least-squares (RLS) algorithm and its inverse model is designed using a zero phase error compensation technology to expand the frequency bandwidth of the force closed-loop system of the EHCLS. A μ theory of robust control is employed to design a stable controller for enhancing robust stability of the EHCLS in the presence of uncertainties of the inner loop, the control mechanism and the high frequency disturbance force. Simulation and experimental results show that the proposed hybrid control approach can greatly improve the control performance of the EHCLS by expanding the frequency bandwidth of the force closed-loop system and enhancing stability of the EHCLS, which can decrease displacement output response error of the EHCLS from 10.34% to 3.1%. 相似文献