Xu Weiming, Hongxuan Yu, Jiang Hao, Tong Peng, Kuang Yaowu, Li Ming, Shu Rong
Appl Opt. 2020 Sep 20;59(27):8167-8174. doi: 10.1364/AO.398382.
Lidar technology is playing an important role in the application of autonomous navigation and hazard avoidance for the landing and cruising exploration on planetary bodies, such as landing on the moon, Mars, and asteroids. We report a Doppler lidar developed for Chang'E-5 mission in this paper. To meet high reliability and resource constraints, time-sharing measuring and in-phase and quadrature processing in this Doppler lidar system was provided and tested. Compared with the traditional linear frequency modulated systems, this lidar system provides excellent detection probabilities of false alarms, especially for the determination of velocity directions. Flight and vibration tests and plume experiments were carried out to further demonstrate the performance and feasibility during the landing mission in late 2020.
激光雷达技术在行星体着陆和巡航探测的自主导航与避障应用中发挥着重要作用，例如在月球、火星和小行星上着陆。本文报道了一款为嫦娥五号任务研制的多普勒激光雷达。为满足高可靠性和资源限制，该多普勒激光雷达系统采用了分时测量以及同相和正交处理，并进行了测试。与传统线性调频系统相比，该激光雷达系统具有出色的虚警检测概率，特别是在速度方向确定方面。2020年末进行了飞行和振动测试以及羽流实验，以进一步证明其在着陆任务期间的性能和可行性。
