中文摘要：

介绍了太阳望远镜实时高精度导行方法.利用大面阵CCD采集主望远镜的全日面H？太阳像,实时获取太阳质心数据,并通过灰度阈值、质心位置判定、太阳像长短轴比率判定等多重逻辑消除云雾等不良天气带来的噪声,提高质心计算精度.采用面向连接的TCP/IP网络通信技术,将质心数据传输到望远镜导行控制端,进而驱动望远镜轴系控制系统实现闭环控制.上述硬件结构和软件算法相结合,不仅实现了高精度导行,还大大提高了望远镜导行系统的稳定性.同时,面向连接的TCP/IP网络通信控制技术,速度更快、更可靠,系统移植更便捷,并为远程控制和观测提供了技术接口.

英文摘要：

A high-precision real-time guide method for solar telescope is introduced in this paper. Since the Solar Magnetism and Activity Telescope（SMAT） has operated for nearly 10 years at Huairou Solar Observing Station, National Astronomical Observatories, some devices have become aging and the system performance has greatly decreased. For performing the technical renovation and transformation, studying a new high-precision auto-guide system for solar telescope was an important and essential job instead of the old guide system. The auto-guiding system goes through a point-line-plane model development in solar telescopes. The new system was based on full-disk solar images which were collected from the main telescope in real-time. The technology of large area CCD array has already substituted the point or line array model in the auto-guide system. We locate the center of the full-disk solar images which recorded by large array CCD image sensor in real time and eliminate noise caused by bad weather, such as clouds and fog, as well as improving computational accuracy of centroid, by setting gray threshold, determining the location of centroid, and using the ratio of the length major axis to the length of minor axis to quantify the deviation from a perfect disk. The deviation is analyzed and changed into control signal, which, through connection-oriented TCP/IP network, drives the motor to adjust the axis of telescope. The system is close-loop control. The above-mentioned method, combining hardware architecture with software algorithms, improves the precision of guide along with stability. Moreover, the connection-oriented TCP/IP network improves the efficiency, reliability and compatibility of the system. An Ethernet interface is also provided for remote control. From the testing results, there was a periodic oscillation which badly influences the tracking accuracy of solar telescope in perpetual motion in RA direction. However, there was a stationary phase on which the deviation is within 3 pixels between two periodic