基于扩张状态观测器的无拖曳系统参数辨识

章楚; 贺建武; 段俐

doi:10.11728/cjss2019.05.670

基于扩张状态观测器的无拖曳系统参数辨识

doi: 10.11728/cjss2019.05.670

章楚^1,2,
贺建武^1,2,
段俐^1,2

1. 中国科学院力学研究所北京 100190;
2. 中国科学院大学工程科学学院北京 100049

基金项目:

中国科学院战略先导项目资助（XDA1502070503，XDB23030100）

详细信息

作者简介:
段俐,duanli@imech.ac.cn

中图分类号: V527
计量
- 文章访问数: 551
- HTML全文浏览量: 8
- PDF下载量: 53
- 被引次数: 0
出版历程
- 收稿日期: 2018-09-25
- 修回日期: 2019-03-26
- 刊出日期: 2019-09-15

Parameter Identification of Drag-free System Based on Extended State Observer

ZHANG Chu^1,2,
HE Jianwu^1,2,
DUAN Li^1,2

1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190;
2. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190

摘要

摘要: 分析了卫星无拖曳控制系统的在轨参数辨识问题，由于无拖曳系统的不稳定性质，需要设计控制器使其稳定，在此基础上进行闭环辨识.根据自抗扰控制原理，设计了扩张状态观测器以估计系统不同控制回路的扰动和状态，基于状态和扰动估计值设计控制器使系统稳定.提出了基于扩张状态观测器（ESO）的多输入多输出系统闭环参数辨识方法.为提高实际应用中的辨识效果，引入积分型滤波器对观测状态中的噪声进行抑制.将这种方法应用于类似LISA Pathfinder的单轴无拖曳模型，对系统动力学参数进行估计，通过数值仿真实验验证了该辨识方法的有效性和实用性.
- 无拖曳 /
- 参数辨识 /
- 扩张状态观测器
Abstract: In this paper, in-orbit parameter identification problem of drag-free control system is studied. Since the drag-free system is not stable, it is necessary to design controllers to stablize this system, then the system can be identificated. According to the principle of active disturbance rejection control, the extended state observer is designed to estimate the disturbance and state of different control loops of the system. Based on the state and disturbance estimation values, the controller is designed to stabilize the system. A closed-loop parameter identification method for multi-input and multi-output systems based on extended state observer is proposed. In order to improve the identification effect in practical applications, the noise in the observed state is suppressed by introducing an integral filter, and the noise suppression mechanism is theoretically explained. Finally, this method is applied to a single-axis non-drag model similar to LISA Pathfinder, and the system dynamics parameters are estimated. The numerical simulation experiments have verified the validity and practicability of the proposed identification method.
- Drag-free /
- Parameter identification /
- Extended state observer

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参考文献(16)

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