基于三模冗余架构的航天器FPGA可靠性设计

Spacecraft FPGA Reliability Design Based on Three-Mode Redundant Architecture

摘要:

为提高航天器FPGA设备的可靠性，提出基于三模冗余架构的航天器FPGA可靠性设计。根据FPGA架构的基础连接原理，设计处理单元、配置单元、射频单元与双闭环电路组织，完成航天器FPGA的拓扑结构研究。在此基础上，连接总线通信串口，按照数据缓存的队列请求，控制总线状态机的既定化状态，完成航天器FPGA结构的传输转换。分别调试关键器件FPGA、复位航天芯片、整星联合三项，实现三模冗余架构的特性分析，完成基于三模冗余架构的航天器FPGA设计。实验检测结果表明，随着设备航行时间的增加，MPPT、SPPT指标的最大数值均占比70%以上，航天器FPGA的高可靠属性得以有效保持。

Abstract:

In order to improve the reliability of spacecraft FPGA equipment, the reliability design of spacecraft FPGA based on three-mode redundant architecture is proposed. According to the basic connection principle of FPGA architecture, the processing unit, configuration unit, RF unit and double closed-loop circuit organization are designed to complete the research on the topology of spacecraft FPGA. On this basis, the bus communication serial port is connected, and according to the queue request of the data buffer, the established state of the bus state machine is controlled, and the transmission conversion of the spacecraft FPGA structure is completed. The key device FPGA, the reset space chip, and the whole star combination are debugged separately to realize the characteristic analysis of the three-mode redundant architecture, and the spacecraft FPGA design based on the three-mode redundant architecture is completed. The experimental results show that with the increase of equipment navigation time, the maximum values of MPPT and SPPT indicators account for more than 70%, and the high reliability of spacecraft FPGAs can be effectively maintained.