亚轨道飞行器再入过程执行机构故障仿真

Failure simulation of actuator for suborbital reusable launch vehicle return course

亚轨道飞行器的执行机构故障会严重影响其控制能力。针对飞行过程中RCS与气动舵可能出现的故障模式,建立了亚轨道飞行器六自由度故障仿真模型,并对典型故障进行了仿真。通过对比正常状态与故障模式下飞行参数的不同,分析了执行机构故障对亚轨道飞行器飞行能力的影响,所得结论可为故障检测及诊断算法研究提供依据。

The actuator fault of suborbital reusable launch vehicle has a strong impact on its controllabili- ty. The possible failure modes of RCS and aero-surfaces during flight were analyzed. The 6-DOF model for SRLV was established and the typical faults were simulated. The influence of the fault in the reentry process was analyzed by comparing the changes of flight parameter under normal and fault conditions. The conclusions can be used as the basis for the study of fault detection and diagnosis algorithm.