中文摘要：

对基于嵌入式平台的自动导星系统进行研究，设计了以ARM7为核心的自动导星系统。使用改进型质心算法以简化算法复杂度，实现导星分辨力达1／10pixel，导星灵敏度达8等星。配合赤道仪的使用，为其增加反馈机制，使之具有自动修正误差的能力，提高了跟踪精度，满足了深空星体的拍摄要求。该系统具有体积小，成本低、携带方便且导星精度及灵敏度高等特点。

英文摘要：

An automatic star tracking system based on embedded platform is studied in this paper, which is realized on the ARM7 platform. Modified centroid- calculating is used to simplify the complexity of algorithm, the acquired resolution of the automatic star tracking system was up to 1/10 pixel, and the detection threshold reached magnitude of 8. This system enhances the tracking accuracy of equatorial mount by bringing in a feedback mechanism, it can be used in deep space astrophotography. The present automatic star tracking system is characterized by its small volume,low cost,portability, high accuracy and high sensitivity.