天文导航系统半物理仿真研究

由于航天实验费用大,为测试星敏感器性能和星图识别算法,需在地面构建天文导航半物理仿真试验平台。从检验星敏感器性能、加快其样机研制周期、降低成本、提高效率的目的出发,设计构建了一个实用性强的天文导航半物理仿真系统;着重介绍了此系统的组成、结构和各模块的功能;叙述了系统的实现方法和相关性能指标。它具有一定的灵活性和可扩展性。最后利用所构建的半物理仿真系统,对星图识别算法和星敏感器性能进行了静态和动态的试验。试验结果显示该系统满足和达到了规定的性能指标。

Hardware in-the-loop Simulation of Celestial Navigation System

Because of high spaceflight laboratory fees, it is impractical to take star-pictures real time in order to debug star sensor and test the algorithm of star map identification. In order to test the performance of identification algorithm, shorten the development cycle of star sensor, as well as reduce the cost and improve the efficiency of development, a new type of hybrid simulation system for celestial navigation was proposed. The configurations, functions and features of the system were ntroduced. The implementation methods and the specifications of the system were described, which had the feature of flexibility and expansibility. At last, by using the hybrid simulation system, some algorithms of star map identification and performance of star sensor could be effectively verified by dynamical and statical test in this platform. The test results show that this system meets the specified performance index.