电子星模在卫星控制系统闭环测试中的应用

The application of electronic simulator in closed loop test

摘要:

针对电子星模在控制分系统闭环测试中的摆放误差引入的问题，提出了一种补偿计算方法。采用静态闭环反馈的方法，静态估计出当前电子星模摆放偏差，软件设计补偿安装矩阵，并动态的将该补偿安装矩阵引入到系统闭环测试中。当电子星模摆放位置不变时，安装偏差保持不变，系统处于闭环测试时，根据当前地面动力学系统实时输出的动态星敏四元数进行实时补偿计算，使电子星模能够接收到动态变化的补偿四元数，而不是动力学直接输出的四元数，使得电子星模接收到补偿后的四元数，电子星模的输出接近目标值，闭环测试中星敏采集到准确的星图。通过实物在闭环回路仿真验证了上述方案的有效性，并通过与传统非补偿方法闭环测试相比较，显示了上述方案的可行性，为工程技术人员进行类似的工程应用提供参考。

Abstract:

In order to improve the placed error in closed loop test when used electronic simulator，a compensation method is introduced. It introduced static calibration method, placed error is estimated, the software designed the compensated matrix, and put compensated matrix into the dynamic colosed loop test. If we don’t change the place, compensated matrix is not changed. When the system was in loop control, according to dynamic system’s output to compute the quaternion, it makes the electronic simulator acceded the changed compensated quaternion. This method make the star sensor sampled the accurate image. The results show that the proposed method improves the output accuracy compared with the conventional piecewise linear correction method,and provided a reference for engineers and technicians in similar application.