望远镜主镜气压力驱动器设计

发布时间：2018-06-25 18:54

本文选题：光学器件 + 天文望远镜　；参考：《光学学报》2012年06期

【摘要】：为了获取优异的光学图像质量,大口径天文望远镜通常采用主动支撑结构以校正主镜面形误差。对望远镜主镜支撑系统所需的气压驱动器进行了研究。基于气动原理设计了一种采用滚动膜片结构的气压力驱动器,其中滚动膜片结构用于消除摩擦力的影响,滚珠式力解耦器用于消除侧向力、弯矩的影响。进一步设计了针对气压驱动器带死区的比例-积分-微分(PID)控制算法,以实现对气压驱动器的闭环控制。实验结果表明:气压力驱动器可精确提供主镜控制所需的支撑力,在望远镜高角变化速度达到2°/s时,输出支撑力范围为0～1000N,驱动器支撑力误差仅为满量程的±0.4%。设计的气压驱动器可实现主动支撑力的快速精确输出,能满足天文望远镜主镜主动支撑需求。
[Abstract]:In order to obtain excellent optical image quality, large aperture astronomical telescopes usually use active support structure to correct the main mirror error. The pressure actuators for the telescope primary mirror support system are studied. Based on the pneumatic principle, a kind of pneumatic pressure actuator with rolling diaphragm structure is designed, in which the rolling diaphragm structure is used to eliminate the influence of friction force, and the ball force decoupling device is used to eliminate the influence of lateral force and bending moment. Furthermore, a proportional integral differential (pid) control algorithm with dead zone for pneumatic actuator is designed to realize the closed loop control of pneumatic actuator. The experimental results show that the pneumatic pressure actuator can provide the required supporting force for the primary mirror control accurately. When the speed of the telescope's high angle variation reaches 2 掳/ s, the output support force is in the range of 01000 N, and the error of the drive support force is only 卤0.4 of the full range. The designed pneumatic actuator can realize the fast and accurate output of active support force and can meet the need of active support for astronomical telescope.
【作者单位】：中国科学院光电技术研究所自适应光学研究室;中国科学院自适应光学重点实验室;中国科学院研究生院;
【分类号】：TH751

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