为了解决传统大气数据系统低空速测量不准确的问题, 采用了以光学多普勒频移为基本原理的低空速测量方法, 并以快速傅里叶变换为数据处理框架构建了一套实验样机, 通过标准风洞实验验证, 得出系统能稳定测量的最小风速为0.22m/s。结果表明, 该系统在不同风速下, 均具有较高的分辨率和稳定性。

In order to solve the incorrect low-airspeed detection of traditional air data system, a low-airspeed detection method based on optical Doppler frequency shift was founded. An experimental prototype was built by using fast Fourier transform as data processing framework. By the experiment of standard wind tunnel, the system can measure minimum wind speed of 0.22m/s. The results show that the system has high resolution and stability at different wind speeds.