拼接镜面主动控制系统的定标  

Calibration of the Active Control System of Segmented Mirror

作　　者：王斌 戴懿纯[1] 许方宇[1] 金振宇[1] 杨德华[3] Wang Bin;Dai Yichun;Xu Fangyu;Jin Zhenyu;Yang Dehua(Yunnan Observatories. Chinese Academy of Sciences. Kunming 650011. China;University of Chinese Academy of Sciences. Beijing 100049. China;Nanjing University of Aeronautics and Astronautics. Nanjing 211106. China)

机构地区：[1]中国科学院云南天文台,云南昆明650011 [2]中国科学院大学,北京100049 [3]南京航空航天大学,江苏南京211106

出　　处：《天文研究与技术》2019年第3期353-358,共6页Astronomical Research & Technology

基　　金：国家自然科学基金(11573068);国家自然科学天文联合基金(U1831134,U1531110)资助

摘　　要：对拼接主镜进行主动控制是拼接镜技术的难点之一,8 m环形拼接太阳望远镜主动光学的控制性能主要取决于倾斜探测的精度与控制模型建立的准确程度。在研制主动控制系统时,需要对倾斜探测精度定标以及建立较为准确的控制模型,即对主动控制系统定标。实验系统中搭建了用于实时探测拼接子镜倾斜的夏克-哈特曼波前传感器,并对其重复测量精度进行了定标,精度达到0.014 arcsec,接近8 m环形太阳望远镜面形控制的要求。然后利用边缘传感器和夏克-哈特曼波前传感器测量了两镜主动控制系统的控制矩阵,建立较为准确的控制模型。Active control of the segmented primary mirror is one of the key technologies. The control performance of the active optics of the 8 m ring solar telescope mainly depends on the accuracy of the tip/tilt detection and the accuracy of the control model.When developing an active control system, it is necessary to calibrate the tip/tilt detection accuracy and establish a more accurate control model, that is, to calibrate the active control system. A Shack-Hartmann wavefront sensor for detection of the tip/tilt of the segmented mirrors is built in the experimental system, and the repeating measurement accuracy is scaled to 0.014 arcsec, which is close to the 8 m RST shape control requirement. Then the edge sensor and Shack-Hartmann wavefront sensor are used to measure the control matrix of the two-segment mirror′s active control system, and a more accurate control model is established.

关 键 词：拼接镜 主动控制 夏克-哈特曼波前传感器 

分 类 号：P111.2[天文地球—天文学]