摘要
为了更快更好地补偿执行器故障带来的不确定性,发展了一种新的多模型自适应执行器故障补偿控制系统设计方法。首先,分析所有可能的执行器故障模式,得到故障模式集。再针对每一种故障模式,分别进行控制器设计,控制器设计时采用直接模型参考自适应执行器故障补偿控制方法进行设计。然后根据参数估计误差分别计算每种故障模式下系统的性能损失函数,选择性能损失最小的子系统对应的控制器作为当前的全局控制器。最后以飞行控制系统为例进行了仿真,仿真结果表明,所设计的多模型直接自适应执行器故障补偿系统闭环稳定,且有良好的跟踪性能。
A new multiple-model indirect adaptive actuator failure compensation control scheme is developed, in order to achieve faster and more accurate compensation of failure uncertainties. For each possible failure pattern, a controller is designed using the direct model reference adaptive actuator failure compensation control method. A multiple-model control switching mechanism is set up by finding the minimal performance index to select the most appropriate control law. The performance index is based on the adaptive estimation errors of adaptive control design. Simulation results from an aircraft flight control system example are presented to show the desired closed-loop system stability and tracking performance despite the presence of uncertain actuator failures.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2011年第B07期104-108,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(60904042
61074080)资助项目
关键词
自适应控制
多模型设计
执行器故障
状态反馈
adaptive control
multiple-model design
actuator failure
state feedback
