针对当前无线电高度表抗干扰能力差、测高精度低、测高范围小、稳定性差等缺点,提出一种基于Kalman滤波的双波束复杂地形高度测量方法.首先采用双波束伪码测距技术获得地形前后两处观测信息,建立地形起伏的一阶近似模型,然后利用 Kalman 滤波技术实现对地形高程和高程变化率的精确测量,从而提高复杂地形测高的准确性和稳定性.仿真验证结果表明,相对于单波束测高方法,基于 Kalman 滤波的双波束测高方法可以大大提高测高的准确性和稳定性,具有较高的工程实用价值.%Aiming at the defects of radio altimeter in poor anti-interference ability, low altitude measurement precision, narrow altitude measurement range and poor stability, a complex topography altitude measurement approach based on Kalman filter and dual beam pseudo-code ranging is proposed. It obtains the observation information of two places in the topography by adopting the dual beam pseudo-code ranging technique, and then establishes the topographic relief model. The accurate measurement of topography elevation and elevation change rate is realized by using Kalman filter, which improves the altitude measurement accuracy and stability of complex topography effectively. The simulation results show that, compared with the altitude measurement method based on single beam pseudo-code ranging, the proposed method can improve the altitude measurement accuracy and stability greatly, which has great significance to the engineering application.
展开▼
