海浪滤波及其在直升机缆高控制中的应用

The application of wave filter in helicopter’s cable-height control system

摘要:

针对直升机在海上执行搜救、探测任务时，海浪噪声会干扰高度信息的测量，引起直升机高度波动的问题，提出一种有效的用于处理海浪噪声的卡尔曼滤波方案。通过建立海浪模型，分析无线电高度表和垂直加速度计测量信号的特点，给出了融合两种高度传感器信息的海浪滤波算法，并应用于直升机高度控制系统进行检验。仿真结果表明，根据海况调整滤波器参数，用所提出的算法可以有效滤除海浪噪声，给出满意的高度信息。将此滤波方案应用于直升机高度控制系统，可以明显改善飞机高度的稳定效果。

Abstract:

When the helicopter carries out the task of rescuing and searching, the stabilityof holding the altitudeshould to be a necessary, however the height of the helicopter would be oscillating due to the disturbance of wave noise on the measurement of height information. Therefore the Kalman filtering algorithm is advanced according to the fusion of radio altimeter and measurementof vertical accelerometer information, whichis performed to deal with the wavenoise and applied to the helicopter height control system. The simulation results show thatthefiltering algorithm can filter the wave noiseeffectively, and obtain the satisfactoryinformation of height. Meanwhile it also improves the stabilization of the height of helicopter.