海洋平台执行器故障最优抗扰自修复容错控制

摘要

For an offshore steel jacket platform with actuator faults and ocean wave disturbances,a fault-tolerant control method is proposed based on the extended fault diagnoser.Firstly,a serf-repairing fault-tolerant control law was designed.Then,an optimal disturbance rejection self-repairing fault-tolerant controller was designed to guarantee the performance of the offshore platform with the actuator faults and ocean wave disturbances.To solve the physically unrealizable problem in the fault-tolerant control that caused by the directly unmeasurable fault and the state of the system,an extended fault diagnoser was designed.Finally,the feasibility and effectiveness of this proposed scheme were verified by digital simulation results.%针对存在海浪干扰力作用下的海洋平台的执行器故障,提出一种基于扩张故障诊断器的容错控制方法.首先,对执行器故障设计了自修复容错控制律,然后根据Riccati和Sylvester矩阵方程设计了一个最优抗扰自修复容错控制器,保证了海洋平台系统在故障和海浪干扰力作用下具有最优系统性能.为了解决容错控制中系统状态和故障不可直接测量的物理不可实现问题,设计了一个扩张故障诊断器.最后,数值仿真结果验证了此方案的可行性和有效性.