风切变是引起空难事故的重要原因之一。具有风切变探测能力的机载前视气象雷达对于保障航空安全非常重要。 由于风切变现象具有危害大、持续时间短且不易探测的特点,使实际数据较难获取。因此,风切变回波信号仿真对风切变 检测技术的研究和验证具有重要意义。文中对风切变雷达回波信号的仿真提出了一个新思路:首先,通过使用风场仿真 软件生成一个较为真实的风切变风场,然后,根据雷达参数高保真地对风切变雷达回波信号进行仿真。通过仿真结果与 风切变结构特征的对比,表明仿真过程合理,仿真数据有效。

Wind shear is one of the most important factors causing air accidents. It can be detected by airborne forward-looking weather radar, which is key equipment for safeguarding air transportation. With great danger and short duration, the real radar data of wind shear is difficult to acquire. So the echo simulation of the wind shear is important to the research of the wind shear detection. In the paper, a new idea for simulating the echo signal of wind shear is proposed. Firstly, a high-fidelity wind shear field is produced from the wind shear model with wind field simulation software. Then it is used to generate the time series data of radar by simulating radar operation. Finally the analysis of the simulation results demonstrates that the simulation is reasonable.

国家自然科学基金;中国民航大学科研 启动基金