摘要
提出了网络化控制系统的一种全新的建模方式——基于Takagi-Sugeno(T-S)模糊模型的网络化控制系统模型,即通过对具有马尔可夫特性的网络时延的分析,得到各时延值的发生概率即局部模型隶属度,从而建立T-S全局模糊模型.在此基础上建立不确定的网络化控制系统模型.考虑系统的不确定性,并针对传感器和执行器的失效问题,提出了保证系统鲁棒稳定的设计算法.利用李亚普诺夫函数,证明该算法能保障网络化控制系统的容错性和稳定性,仿真结果验证了其有效性.
A new modeling method of networked control system (NCS) is proposed by using Takagi- Sugeno (T-S) fuzzy model. In this method, Markov network-induced delay was analyzed to obtain the occurrence probability of each delay value as local membership grade. A T-S global model is set up, by which a NCS model is obtained and an algorithm is investigated. This algorithm considers the system uncertainty, deals with both the sensor failure and the actuator failure. The fault tolerance and robust stability of the system when the algorithm was used were proved by Lyapunov function. Simulation results show the effectiveness of the proposed method.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2008年第3期111-113,121,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60604030,60274014)
湖北省自然科学基金资助项目(2005ABA252)
作者简介
郑英(1977-),女,副教授;武汉,华中科技大学控制科学与工程系(430074).E-mail:zyhidy@mail.hust.edu.cn