Acceleration feedback control (AFC) enhanced by disturbance observation and compensation (DOC) for high precision tracking in telescope systems

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2016,（8）
• 页码范围: 51-60
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-4527/16/8/124

摘要

In this paper,a cascade acceleration feedback control (AFC) enhanced by a disturbance observation and compensation (DOC) method is proposed to improve the tracking precision of telescope systems.Telescope systems usually suffer some uncertain disturbances,such as wind load,nonlinear friction and other unknown disturbances.To ensure tracking precision,an acceleration feedback loop which can increase the stiffness of such a system is introduced.Moreover,to further improve the tracking precision,weintroduce the DOC method which can accurately estimate the disturbance and compensate it.Furthermore,the analysis of tracking accuracy used by this method is proposed.Finally,a few comparative experimental results show that the proposed control method has excellent performance for reducing the tracking error of a telescope system.