卫星姿态控制系统硬件在回路仿真研究

为了便于卫星自主智能控制技术的研究，该文研究了控制系统硬件在回路仿真技术，分析了实时仿真系统中仿真步长的确定及通讯接口技术的应用。文中详细说明了在MATLAB下采用S—function编写串口驱动模块的方法，还介绍了利用MATLAB／xPC环境下的UDP模块进行数据传输的方法。最后，该文设计了一个基于PC机的三轴稳定卫星姿态控制硬件在回路仿真系统，将反作用飞轮、陀螺等实物接人仿真系统。仿真结果表明实时仿真结果与数学仿真结果基本一致，仿真系统接口设计合理，实时性符合要求。

Research on Hardware in the Loop Simulation for Satellite Attitude Control System

This paper discusses the hardware in the loop simulation of control system for the researches on the technology of satellite self-determination intelligent control,and analyzes the choosing of simulation step in real-time simulation and the application of the technology to communication interface.The method of building driver module for serial port with S-function based on MATLAB and the way of data transmission with the application of UDP module under MATLAB/xPC target environment are introduced and analyzed in details.At last,the hardware in the loop simulation system for three-axis stabilized satellite attitude control based on PC,with reaction wheel and gyro in the loop is designed.The results show the consistency of digital simulation and real-time simulation,the rationality of communication interface and the satisfaction of real-time characteristic.