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针对民用飞机自动飞行过程中驾驶杆/盘存在较高频率抖动现象,提出一种基于小波理论和有限脉冲响应(FIR)滤波器的信号综合处理方法,以抑制驾驶杆/盘的高频抖动。首先分析了驾驶杆高频抖动形成机制及其影响,然后采用Matlab小波分析工具箱对自动飞行系统内环控制律的输入信号进行分析,通过多级分解确定信号中不同的频率成分;最后设计出一种FIR滤波器,滤除自动飞行系统输入信号中的无用成分,从而减少输出指令中的无效控制信号,以减轻驾驶杆/盘的高频抖动。
Aiming at the high frequency jitter of cockpit / disk during the flight of civil aircraft, a signal processing method based on wavelet theory and finite impulse response (FIR) filter is proposed to suppress the high frequency jitter of the cock / disk. Firstly, the forming mechanism of the high frequency jitter of the cockpit and its influence are analyzed. Then, the input signal of the inner loop control law of the autoflight system is analyzed by Matlab wavelet analysis toolbox, and the different frequency components in the signal are determined by multilevel decomposition. Finally, An FIR filter that filters out unwanted components in an input signal to an autoflight system to reduce invalid control signals in the output command to reduce dithering of the joystick / disk.