基于CPCI总线的航天器通信信号设备故障检测系统设计

Design of Fault Detection System for Spacecraft CommunicationSignal Equipment Based on CPCI Bus

针对当前航天器通信信号设备故障检测系统受到噪声影响,导致系统通信设备故障信号检测精准度低,检测时间长的问题,设计基于CPCI总线的航天器通信信号设备故障检测系统;CPCI故障模拟模块利用RS232串行线控制注入机,采用故障注入器执行故障注入CPCI总线,接收控制系统参数和指令,使用时钟分配芯片传输时钟信号,通过CPCI检测板卡模块,配合FPGA实现接口控制,完成系统硬件结构设计,利用任务间相互依赖关系,实现任务间相互检测,通过终端网工作站定期发送多路通信网相关信息,返回无疵点检测结果,采用二次相关算法,提取多通道通信故障信号详细信息,准确估算通信信号时延,排除多通道网络噪声影响造成的通信故障,完成系统软件部分设计;实验结果表明,基于CPCI总线的故障检测系统的故障信号检测时间仅为1.8 s,故障信号幅度最大为28 dB,最小为1 dB,与实际变化幅度一致,通信设备故障信号检测精准度较高,能够有效缩短通信设备故障信号检测时间。

Aiming at the problems of low accuracy and long detection time caused by noise in the current spacecraft communication signal equipment fault detection system,a fault detection system of spacecraft communication signal equipment based on CPCI bus is designed.The CPCI fault simulation module uses RS232 serial line to control the injector,uses the fault injector to execute fault injection into CPCI bus,receives control system parameters and instructions,uses clock distribution chip to transmit clock signal,detects board module through CPCI,realizes interface control with FPGA,and completes system hardware structure design.By using the interdependence between tasks,the mutual detection between tasks is realized.Through the terminal network workstation,the relevant information of multi-channel communication network is regularly sent,and the defect free detection results are returned.The secondary correlation algorithm is used to extract the detailed information of multi-channel communication fault signal,accurately estimate the communication signal delay,eliminate the communication fault caused by multi-channel network noise,and complete the system software department sub design.The experimental results show that the fault signal detection time of the fault detection system based on CPCI bus is only 1.8 s,the maximum fault signal amplitude is 28 dB and the minimum is 1 dB,which is consistent with the actual change amplitude.The fault signal detection accuracy of communication equipment is high,which can effectively shorten the fault signal detection time of communication equipment.