基于理论建模和ARX模型的定位平台系统辨识

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (13) : 66-69.

论文

基于理论建模和ARX模型的定位平台系统辨识

汪静姝1，郭杰2，竺长安2

作者信息 +

Identification of positioning stage based on theoretical model and ARX model

Wang Jingshu1 Guo Jie2 Zhu Changan2

Author information +

文章历史 +

摘要

为了了解精密定位平台的系统特性，建立了单输入双输出动力学模型，并设计相应的定位实验。对原始实验数据进行离散数据插补和归一化处理，在实验数据和动力学模型的基础上，采用最小二乘法进行未知参数的辨识。采用基于ARX模型的系统辨识方法对内工作台系统进行辨识。两种辨识结果的对比显示，基于ARX模型的辨识结果与实际数据更加吻合，适合描述系统特性；而基于理论模型的辨识结果则更加贴近系统实际结构，对系统结构优化有指导意义。

Abstract

In order to realize the characteristics of the positioning stage, a model with single input and two-outputs has been developed and the positioning experiment has been done. Based on the kinetic model and the data after interpolating and normalizing, the unknown parameters have been identified by the aid of the least square method. Another identification method based on the ARX model has been applied to recognize the system of the inside stage. The comparison indicates that the ARX model is appropriate to describe the characteristics, while the kinetic model is meaningful for structure optimization.

导出引用

汪静姝;郭杰;竺长安. 基于理论建模和ARX模型的定位平台系统辨识[J]. 振动与冲击, 2013, 32(13): 66-69

Wang Jingshu Guo Jie Zhu Changan. Identification of positioning stage based on theoretical model and ARX model[J]. Journal of Vibration and Shock, 2013, 32(13): 66-69