海浪滤波及其在直升机缆高控制中的应用

Application of Wave Filter in Helicopter's Cable-height Control System

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。

When the helicopter carries out the tasks of rescuing and searching on the sea,Kalman filtering design proposal is advanced,which is aimed at processing the ocean wave noise effectively,under the condition of the height of the helicopter would be oscillating due to the disturbance of wave noise on the measurement of height.By establishing ocean wave model and analyzing the characteristic of radio altimeter and measurement information of vertical accelerometer,filtering algorithm based on the fusion of radio altitude and vertical height is put forward,also applies to the examination of helicopter height control system.The simulation results show that the parameter adjusting to the sea conditions and the algorithm proposed in this paper can filter the sea noise effectively,as well as obtain the satisfied height information.Applied this proposal to the helicopter height control system,the stabilization of the helicopter＇s height can be improved obviously.