基于PXI总线的星载机仿真系统研究

RESEARCH ON SIMULATION SYSTEM OF ON-BOARD

摘要:

卫星仿真与测试平台是卫星研制过程中的重要组成部分，能够在地面对卫星的飞行状态和各分系统的性能及故障模式进行测试，是卫星正常运行的技术保障。为此，研究了基于PXI总线技术的星载机仿真系统。首先，在LabVIEW环境中编写各仿真分系统的通讯程序。通过CAN总线进行数据通讯，以此验证星载机的数学仿真算法的正确性。其次，将PC机下的星载机仿真程序移植到PXI的LabVIEW-RT环境中。此时卫星的其他分系统分别采用单片机和DSP来进行模拟。最后，在PXI中编写测控程序，充分利用LabVIEW提供的信号分析控件和图形化语言，监控星载机数学仿真程序中重要的姿轨控制参数，实时显示其变化趋势与范围，并对这些参数进行分析，保证算法的可靠性，为真实的星载机控制系统奠定基础。

Abstract:

Satellite simulation is an important part of satellite manufacture, it can test the flying condition, performance and failure mode of any distribute system on the ground. Any way, simulation is the technology assurance of normal running.The paper researched the on-board computer simulation and testing based on PXI-BUS technology. First, the distribute systems communicated with CAN card in LabVIEW environment in PC. Through the communication between any system, display the gesture and orbit parameters in procedure algorithm, tested the validity of algorithm.Second, the distribute systems communicated in PXI-RT system with CAN card. Specially, on-board computer system and dynamic system running in the same PXI.At last, developed testing procedure in PXI. Taking full advantage of signal analysis toolbox providing by LabVIEW, testing the important parameters in on-board computer numeral simulation system, and display its’ trend and range. In this method, we can assure the reliability of algorithm, and settle the base of real satellite control system.