飞控系统故障检测的参数模糊自适应调节  

Fuzzy Adaptive Adjustment in FCS Failure Detection

作　　者：胡致远[1] 李宏培[2] 

机构地区：[1]西北工业大学 [2]西安电子科技大学

出　　处：《飞行力学》1999年第2期30-35,共6页Flight Dynamics

摘　　要：提出通过模型参数的模糊比例积分自适应调节，以校正基于模型的飞控系统故障检测中的系统数学模型偏差。针对模型中误差较大的迎角导数值，将俯仰角加速度的测量值与数学模型估计值之差作为比例积分调节的反馈量，动态实时校正数学模型参数。运用模糊逻辑，达到在无故障条件下抑制过大的模型误差，而在故障条件下突出故障信息。仿真结果表明：该方法可以较好地跟随实际飞机工作状态，从而提高了故障检测精度。Aircraft flight control system (FCS) elements failure can be detected by analytic redundancy analysis. However, accuracy of this failure detection algorithm is sensitive to mathematical models. In this paper, bias errors of these mathematical models can be compensated by fuzzy PI adaptive adjustment. The main bias error caused by derivative of angle of attack can be diminished by PI adjustment of the pitch angular acceleration residual feedback. Moreover, fuzzy logic may reduce model errors when FCS being in normal, and show failure signals when FCS being in failure. This algorithm was certified in simulation.

关 键 词：故障检测 解析斜度 自适应调节 飞行控制系统 

分 类 号：V249.122[航空宇航科学与技术—飞行器设计]