不可建模故障且故障数目不确定的自适应容错控制

项目名称： 不可建模故障且故障数目不确定的自适应容错控制

项目编号： No.61473250

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 沈启坤

作者单位： 扬州大学

项目金额： 80万元

中文摘要： 本项目以近空间飞行器容错飞行控制为背景，研究具有执行器/传感器不可建模故障且故障数目不确定的非线性系统的自适应故障诊断与容错控制问题.在提出一种能够同时处理增益和偏置故障的时变复合故障模型基础上,充分研究故障发生机理,建立不确定数目的故障模型；探索一个或多个执行器/传感器发生不确定数目故障的故障诊断与容错控制；构造广义自适应模糊/神经网络滑模观测器以研究多个执行器和传感器同时发生不同类型故障的诊断；利用BLF及有关代数几何理论,挖掘神经网络基函数的有关性质，研究不可建模故障的诊断与补偿，并进一步研究具有不可建模故障且故障数目不确定的非线性系统的容错控制；定量分析FDI诱导的时滞及其对系统性能的影响；深入研究近空间飞行器容错飞行控制问题，并运用所提出的非线性系统容错控制方法，建立一套该类飞行器飞行容错控制框架.本项目拓宽了自适应故障诊断和容错控制的研究领域，具有重要学术意义和实际价值.

中文关键词： 故障诊断；容错控制

英文摘要： The projection is based on a class of fault tolerant flight control problem of near space vehicles (NSV), researches the problem of adaptive fault diagnosis and fault tolerant control for nonlinear systems with infinite number of un-modeled actuator/sensor faults. First of all, based on a novel general composite fault model that can deals with both time-varying gain and bias faults, fault mechanism is studied enough and the fault model with infinite number of faults is established; fault disgnosis and fault torlerant control for nonlinear systems with infinite number of faults occurred in one or multiple actuators/sensors are investigated, respectively. Then, descriptor adaptive fuzzy/neural sliding mode observers are designed to diagnose different types of faults simultaneously occurred both in actuators and sensors. Thirdly, by using barrier Lyapunov function（BLF）and some algebraic geometric theorems, some useful property of the basis function of the radial basis function of neural network are explored, and fault diagnosis and fault compensation for un-modeled faults are researched. Further, the fault folerant control for nonlinear systems with infinite number of un-modeled faults is studied. In addition, the time delay due to fault diagnosis and isolation and its influence on the controlled systems' performance are quantitatively analyzed. Finally, the flight control problem of NSV is deeply researched. Based on the proposed approaches, a new fault tolerant flight control framework as well is provided for NSV. This projection enlarges the research fields of adaptive fault diagnosis and fault tolerant control, which makes the project have the important academic value and practical meaning.

英文关键词： fault diagnosis;fault tolerant control