基于FPGA的通用开放式星载陀螺模拟器设计

Design of Gyro Simulator for Small Satellite with FPGA 

摘要:

陀螺是小卫星平台上姿轨控制分系统中的重要敏感元件,而陀螺模拟器是小卫星姿轨控制分系统地面测试过程模拟陀螺仪的数据流向和时序关系的必要设备;针对通用化的小卫星陀螺模拟器的设计需求,开发了一种基于FPGA和CAN总线接口的陀螺模拟器,采用了FPGA作为主控芯片,实现了支持多类常用星载陀螺数据通信协议的实时接口,并配置了具备电平隔离功能的CAN、RS-485等总线接口电路,实际配置一种工作状态的测试和实验验证表明,所设计的陀螺模拟器具有较高的可靠性和良好的通用性。

Abstract:

Gyro is an important sensitive unit in pose rail control subsystem on small satellite platforms. And gyro simulator is a necessary equipment to simulate star sensor data and timing relationships on ground test for pose rail control subsystem on a small satellite platform. According to actual requirements, this work designed a gyro simulator based on FPGA and CAN bus interface. FPGA is adopted as the master control chip, as a result, the universal types of data communication protocols are provided, including CAN bus, and RS-485 bus and RS-422 bus. An actual case study with a specific configuration for an application situation, the test and verification shows that the design of gyro simulator can achieve high reliability and good generality. 