一种小卫星模拟装置的动态模型辨识

Dynamic Model Identification of a Small Satellite Simulator

针对一种小卫星模拟装置的动态模型辨识问题,提出了一种多变量两阶段辨识方法。在对该单轴小卫星模拟装置控制系统进行激励信号选取和实验设计的基础上,利用这种方法对反映模拟装置动态特性的低阶广义姿态模型进行了辨识,并用实验数据进行了模型检验。此模型为该小卫星模拟装置的控制器设计和状态估计提供了重要的依据。通过单轴小卫星模拟装置的辨识实验验证了这种辨识方法的有效性。

We proposed a multivariable two- stage identification approach to solve the problem of dynamic model identification of a small satellite simulator. Based on the exciting signal selection and experiment design for the control system of this small single-axis satellite simulator, we identified the low order generalized attitude models （GAM） representing its dynamics by the proposed method. Subsequently, the validation of these models was also made by experimental data. Therefore, they become the basis of controller design and state estimation for this satellite simulator. It is through the single-axis identification experiments of this simulator that the effectiveness of this proposed identification approach is verified.