项目名称: 基于滑模技术的线性参数变化系统的容错控制方法研究
项目编号: No.61503055
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 自动化技术、计算机技术
项目作者: 郝立颖
作者单位: 大连海事大学
项目金额: 21万元
中文摘要: 本项目从滑模技术手段出发,针对具有仿射不确定性和量化现象的线性参数变化系统的容错控制问题展开研究。首先分析出执行器故障和仿射不确定性对滑模面构造和到达律设计产生的影响,根据其特点,采用矩阵分解技术来构造滑模面,同时使用切换技术和自适应机制来设计滑模到达律;其次分析量化现象与故障之间的相互作用机理,探索滑模控制与自适应容错机构联合作用的内在变化规律,进而考虑如何设计量化参数动态调节策略和到达律从而实现闭环系统在不同故障模式下均能渐近稳定。由于系统模型普遍存在的时变不确定性以及可能发生的时变故障,要求所设计的控制系统必须对时变不确定性具有鲁棒性,对时变故障具有容错功能。因此,该项目研究从理论上进一步研究基于滑模技术的容错控制方法,不仅可以拓展鲁棒容错控制研究内容,而且对改进实际工程系统的可靠性和安全性具有重要意义。
中文关键词: 鲁棒容错控制;滑模控制;线性参数变化系统
英文摘要: The project studies the problem of fault-tolerant control based on sliding mode technique for a class of linear systems with affine parameter uncertainties, quantization and actuator time-varying faults. Firstly, the affections of time-varying actuator faults and uncertainties on sliding surface construction and reaching law design is studied, and based on matrix full-rank factorization technique, a new sliding surface is constructed. At the same time, switched technique and adaptive mechanism are used to design reaching law. Secondly, the relationship between quantization parameter and fault information is analyzed, and the next consideration is on how to design an adjustment strategy of quantization sensitivity and find the adaptive sliding mode control law to compensate the quantization errors, actuator faults and uncertainties. Our aim is to design a sliding mode controller so that the closed-loop system can be robust to affine parameter uncertainties and be tolerant to actuator faults. The project helps to further study on the robust fault tolerant control field and will be of great importance in reliability and safety in practical applications.
英文关键词: robust fault tolerant control ;sliding mode control ;linear parameter varying systems