应用激光, 2017, 37 (6): 870, 网络出版: 2018-01-10
激光多普勒测速仪在飞行器导航中的应用研究
Research on the Application of Laser Doppler Velocimeter in Aircraft Navigation
激光多普勒测速仪 四波束 Janus配置 交叉采样算法 三维导航 laser doppler velocimeter four beam Janus configuration cross sampling algorithm 3-D guidance
摘要
针对当前激光多普勒测速技术只能应用于二维平面运动载体导航这一现状, 对该技术在飞行器三维空间运动导航中的应用进行了探索性研究。首先, 通过对激光多普勒波束配置特性进行分析, 提出了能够最大程度获取飞行器导航信息的激光多普勒波束配置方案。随后, 利用多普勒频移理论建立了相应的激光多普勒导航状态方程, 并针对状态方程太少, 无法求解这一现状, 提出了一种交叉采样解算法分时解算飞行器各状态量, 通过推导得到了飞行器的速度、姿态解算公式, 实现了对所有导航状态量的解算。最后, 根据所提出导航解算方案的特点, 对激光多普勒测速仪在实际飞行器导航中的应用方式进行了分析, 提出了相应的导航策略, 并通过对某飞行器进行六自由度仿真对所提出的方法进行了验证, 仿真结果证明了设计方案的正确性和有效性。
Abstract
Aiming at the status that the application of LDV (Laser Doppler Velocimeter) technique is merely restricted to the guidance of vehicles run in 2-D plane, a preliminary research on the problem of how to apply LDV to the guidance of aircraft flying in 3-D space is made. First, a theoretical analysis on the characteristic of LDV beam configuration is made, the LDV beam configuration scheme which is capable of obtaining most aircraft navigation information is proposed. Second, the corresponding LDV guidance equations are established using Doppler's frequency shift theory. Aiming at the problem that guidance equations are too less to solve all state variables, a novel cross sampling algorithm is proposed to calculate different guidance state variables at different time in turn, the corresponding equations to calculate aircraft speed and attitude are obtained by deduce, which solve all guidance state variables. Finally, according to the characteristic of proposed navigation calculate scheme, a deep analysis on the application mode of LDV in real aircraft guidance is made, corresponding guidance strategies are given. A 6DOF numerical simulation study is made to validate proposed scheme, simulation results verify the correctness and effectiveness of the method.
李静, 曾令东, 袁胜智, 徐君明. 激光多普勒测速仪在飞行器导航中的应用研究[J]. 应用激光, 2017, 37(6): 870. Li Jing, Zeng Lingdong, Yuan Shengzhi, Xu Junming. Research on the Application of Laser Doppler Velocimeter in Aircraft Navigation[J]. APPLIED LASER, 2017, 37(6): 870.