基于Kalman滤波的直升机海面悬停精确高度提取法

Extraction Method of the Accurate Height for Helicopter Hovering Over Sea Based on Kalman Filter

中文关键词:  直升机  海浪  能量等分法  功率谱法  Kalman滤波

英文关键词:helicopter  sea wave  energy in part  rational power spectrum  Kalman filter

中文摘要:

      针对反潜直升机海上悬停时高度信号受到的海浪噪声干扰，分别采用能量等分法和海浪功率谱法，基于Matlab/Simulink讨论了建立高精度的海浪快速仿真模型的方法，提升了海浪模型的实用性。在无线电高度表与垂直加速度计组合高度系统基础上设计了Kalman滤波器，实时地对海浪噪声进行滤波，以获取精确的高度信号。对不同海况下直升机遭遇的海浪进行仿真实验，结果表明所设计的高度组合系统及滤波器有效，具有良好的实时性和鲁棒性。

英文摘要:

      For the sea wave disturbance encountered by anti submarine helicopter when hovering over the sea，the two methods of energy in part and rational power spectrum are studied to establish sea wave model quickly based on Matlab/Simulink.The practicality of the sea wave model is improved.According to the integrated height system of radio altimeter and vertical accelerometer，a Kalman filter is designed to estimate noises in real time，therefore the accurate altitude signals are gotten.Simulations are carried out for different sea waves.The results indicate that the integrated height system and the filter are effective and have good real time performance and robustness.