光纤定位单元的无刷直流电机控制系统设计

Design of Compact Brushless DC Motor Control System of Fiber Positioning

大天区面积多目标光纤光谱天文望远镜(LAMOST)的改进项目计划使用一种直径为10mm的光纤定位单元替换原来的30mm光纤定位单元,以增加焦面上布置的光纤数量并达到增加光谱获取率的目的。新的10mm双回转光纤定位单元使用了两个4mm无刷直流电机和串联在单元尾部的控制板进行光纤的定位,一种紧凑的无刷直流电机位置控制系统被设计用于新的10mm单元的控制。该控制系统可同时实现两个电机的控制,并解决电机的细分、位置校正、堵转检测等问题。从硬件设计和软件设计介绍了该控制系统的搭建和定位实现。

An Improvement Project of Large Sky Area Multi-Object Fiber Spectroscopy Telescope(LAMOST)is planning to replace the original 30mm fiber positioner with a 10mm diameter fiber positioner,so as to place more optical fiber on the focal plane and increase the spectral acquisition rate.The new 10 mm double rotation fiber positioning unit uses two 4 mm BLDCM motors and a control board connected in series at the end of the unit to position the fiber.A Compact BLDCM position control system is designed for the new 10 mm fiber positioner.The control system can realize the control of two motors at the same time,and meet the needs to solve subdivision,position correction,stall detect and other problems.This paper introduces the construction and positioning of the control system from the hardware design and software design.