载体振动对差动激光多普勒测速仪的影响

 为了减小载体振动对传统差动激光多普勒测速仪(LDV)测速精度的影响，提出了Janus配置的差动LDV，并对其速度测量的相对误差进行了理论分析与数值仿真。结果表明：Janus配置技术可以近似反演出载体上下振动时的俯仰角，并对速度进行补偿；载体上下振动对传统差动LDV的测量精度有较大影响，而对Janus配置的差动LDV的影响较小；在Janus配置的差动LDV中，当存在俯仰角且大小一定时，随着载体上下起伏速度与运行速度比值增大，速度测量的相对误差增大；当载体上下起伏速度与运行速度的比值为0.01，俯仰角小于10°时，Janus配置的差动LDV的速度测量的相对误差小于0.2%。

Influence of vehicle's vibration on dual-beam laser Doppler velocimeter

A dual-beam laser Doppler velocimeter(LDV) with Janus configuration was put forward,in order to reduce the effect of vehicle's vibration on measurement accuracy of the conventional dual-beam LVD.Theory analysis and simulation of the relative error of measurement show that the pitch angle can be calculated approximately by Janus configuration technique,and then the velocity can be compensated.The precision of the conventional dual-beam LDV is much affected by the pitch angle,whereas the Janus-based system is...