基于北斗卫星通信的航天测控频段故障诊断系统设计

针对传统航天测控频段故障诊断方法受到信息传输时延影响而导致诊断精准度低的问题,提出基于北斗卫星通信的航天测控频段故障诊断系统设计;硬件结构设计了判断故障类型的波头信号检测模块;通过地面接收机接收卫星发出的微弱信号,计算本机晶振脉冲数,以此修改北斗卫星通信数据;利用北斗授时模块,保证了输出时间的准确性,避免了延迟问题;软件部分用逻辑推理设计航天测控频段故障诊断流程,并使用北斗卫星诊断技术,纠正误差;由实验结果可知,该系统信号线松动脉冲信号诊断结果与实际情况一致,陀螺输出角度量漂移与实际值一致,误差为0,具有精准诊断结果.

Design of fault diagnosis system for space TT&C frequency band based on Beidou satellite communication

Aiming at the problem that traditional analytical models, signal processing and knowledge methods are affected by information transmission delays and resulting in low diagnostic accuracy, a design of a fault diagnosis system based on Beidou satellite communication for aerospace measurement and control frequency bands is proposed. The hardware structure is designed with a wave-head signal detection module to determine the type of fault; the weak signal sent by the satellite is received through the ground receiver, and the number of local crystal oscillator pulses is calculated to modify the Beidou satellite communication data. The Beidou timing module is used to ensure the accuracy of the output time and avoid the delay problem. The software part uses logical reasoning to design the fault diagnosis process of the aerospace measurement and control frequency band, and uses the Beidou satellite diagnosis technology to correct the error. It can be seen from the experimental results that the system''s signal line loose pulse signal diagnosis result is consistent with the actual situation, the gyro output angle drift is consistent with the actual value, and the error is 0, which has an accurate diagnosis result.