考虑有执行器故障和有界扰动的鲁棒自适应容错补偿控制

考虑在执行器故障和外界干扰下, 用直接自适应状态反馈控制策略解决线性时不变连续时间系统的鲁棒容错补偿控制问题. 提出更一般且更实际的执行器故障模型. 在执行器故障和扰动的上界都未知下, 提出自适应律在线估计未知控制器参数. 然后基于自适应策略的信息, 构造一类鲁棒自适应状态反馈控制器自动补偿故障和扰动的影响. 基于李亚普诺夫定理, 在执行器故障和干扰下, 所得的自适应闭环系统可以被保证渐进稳定. 最后给出一个火箭整流罩模型的例子和它的仿真结果.

Robust Adaptive Fault-tolerant Compensation Control with Actuator Failures and Bounded Disturbances

In this paper, direct adaptive state feedback control schemes are developed to solve the robust fault-tolerant compen-sation control problem for linear time-invariant continuous-time systems with actuator failures and external disturbances. While both eventual faults and upper bound of disturbances are un-known, the adaptive laws are proposed to estimate the unknown controller parameters online. Then, a class of robust adaptive state feedback controllers is constructed for automatically com-peusating the fault and the disturbance effects based on the in-formation from the adaptive schemes. On the basis of Lyapunov stability theory, it is shown that the resulting adaptive closed-loop system can be guaranteed to be asymptotically stable in the presence of faults on actuators and disturbances. A numer-ical example of rocket fairing structural-acoustic model and its simulation results are given.