基于仿真的月球着陆器制导控制系统时序研究

Research on Timing Problem of Lunar Lander Guidance and Control System Based on Simulation Analysis

针对目前月球着陆器制导与控制研究中只考虑动力学过程而忽略嵌入式系统处理能力的问题,提出了一种考虑控制时序约束的着陆器月面着陆过程制导与控制周期选择方法,为系统时序参数设计提供了一定的理论依据。首先基于仿真分析,对着陆过程制导与控制周期进行初步筛选;再根据实时系统性能,选择满足时序约束的回路周期。最后将实时系统时序与动力学过程进行联合仿真研究,验证了方法的有效性。

In this paper, we aim at the problem that only the dynamic process is considered and the handling ca- pacity of embedded real - time system is ignored in the study of lunar lander guidance and control system. And we present its guidance and control loop periods selecting method with considering the timing constraints of lunar landing process, which provides a theoretical basis for timing parameter design. Firstly, the guidance and control periods were preliminarily selected based on the simulation analysis. Moreover, the period pairs were picked out according to the real - time system performance. Finally, the joint simulation of the real - time system timing and dynamics process was carried out, and the validity of the method was verified.