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针对多操纵面飞机舵面损伤的快速故障诊断问题,提出一种直接估计舵面偏转量的自适应补偿观测器方法。首先,设计了增广观测器进行系统输入估计,并提出了自适应补偿方法解决其动态跟踪性能差的问题;其次,设计了一种新的自适应阈值以快速检测故障并降低虚警率;最后,利用舵面故障特点,采用重置初值的限定记忆最小二乘方法实现了对突变参数的实时估计,用以进行故障隔离。仿真结果表明:在不同的舵面损伤故障情况下,所提出的观测器方法能在20ms内发出故障预警,并在0.22s内确定故障位置,所采用的辨识方法可以在故障报警后的0.2s内准确估计出损伤程度。
Aiming at the problem of rapid fault diagnosis of multi-control plane’s rudder surface damage, an adaptive compensation observer method is proposed to directly estimate the rudder deflection. Firstly, an augmented observer is designed to estimate the system input. An adaptive compensation method is proposed to solve the problem of poor dynamic tracking performance. Secondly, a new adaptive threshold is designed to quickly detect faults and reduce the false alarm rate. Finally, the real-time estimation of catastrophe parameters is implemented by using the memorized least squares method of initial resetting, which is based on the fault characteristics of the rudder surface, and is used for fault isolation. The simulation results show that the proposed observer method can give a warning of failure within 20ms and determine the fault location within 0.22s under different failure conditions of the rudder surface. The identification method adopted can be used in the 0.2s Accurately estimated the extent of damage within.