基于xPC的挠性天线跟踪指向系统半物理仿真

为了实时验证具有星间链路天线的多体结构卫星星体姿态稳定和天线跟踪指向复合控制算法的有效性,借助xPC实时目标环境对某型多体结构卫星的半物理仿真(hardware-in-the-loop simulation,HILS)系统进行了开发,用xPC目标机模拟星载计算机的外部实时仿真环境,与产品级的复合控制器、天线框架驱动机构(an-tenna gimbal drive assembly,GDA)实物组成实时仿真环路。采用Simulink和Stateflow混合建模的方法实现了天线不同模式之间的切换,并用S函数对PCI总线类型的串行接口通信在xPC目标下进行了二次开发。实验结果证明了接口模型建立的正确性、复合控制系统设计的合理性以及该仿真方法的有效性。

xPC-based hardware-in-the-loop simulation for flexible antenna tracking and pointing system

To test the complex control algorithm for attitude stabilization of multi-body structure satellite with inter-satellite link antennae and antenna tracking and pointing in real-time condition,hardware-in-the-loop simulation(HILS) system of certain large flexible multi-body structure satellite is set up based on xPC target.The xPC target computer used for imitating external real-time condition of space-borne computer,complex controller,and antenna gimbal drive assembly(GDA)are constructed together into a closed simulation loop.To switch different antenna working mode,hybrid modeling with simulink and stateflow is put forward,and for serial interface communication of PCI bus under xPC target,the corresponding S-function program is developed.Simulation results validate the effectiveness of the presented simulation method.The results show that the modeling of interface communication is correct and the designed complex control strategy is feasible.