The Ultra-low Speed Research on Friction Drive of Large telescope | |
Fujia DU ; Daxing WANG | |
2006-06-27 | |
会议日期 | 2006-5-24 |
会议地点 | Orlando, FL |
关键词 | large telescope friction drive nonlinear PID control ultra-low speed |
卷号 | 6274 |
期号 | 6274 |
页码 | Vol.6274 10-1-10 |
英文摘要 |
No periodical error and free of backlash are the main advantages of friction drive. So friction drive is applied in many ultra-low speed systems in the past years. With the trend that the aperture of optical telescope becomes bigger and bigger, there are some reports about friction drive employed to drive the telescopes. However friction drive also brings up challenge to control system because the inherent nonlinear characteristics of friction drive. This report describes the study on the friction drive finished in an experiment arranged by LAMOST project. It comprises three main parts. First, it introduces the experiment apparatus and presents a friction nonlinear curve to indicate the nonlinear characteristics of friction drive. Subsequently, this report illuminates the negative result that influenced by the nonlinear characteristic. Secondly, this report use nonlinear PID control algorithm to control friction drive. It achieves ultra-low speed and high precision position control. The ultra-low velocity is 0.2″/S and error is 0.032″(RMS). This report also lists some factors that influence the precision of speed. Lastly, this report gives the analysis fluctuating speed of friction drive and applies acceleration feedback to diminish this fluctuating. |
会议主办者 | The International Society for Optical Engineering |
会议录 | Advanced Software and Control for Astronomy |
会议录出版者 | SPIE |
学科主题 | 精密机械及传动 ; 自动控制 |
内容类型 | 会议论文 |
源URL | [http://ir.niaot.ac.cn/handle/114a32/457] |
专题 | 南京天文光学技术研究所_中科院南京天光所知识成果_会议论文 南京天文光学技术研究所_望远镜新技术研究室_会议论文 |
推荐引用方式 GB/T 7714 | Fujia DU,Daxing WANG. The Ultra-low Speed Research on Friction Drive of Large telescope[C]. 见:. Orlando, FL. 2006-5-24. |
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