Design Of Hand-Held Telescope Image Stabilization System

As the development of living condition, cameras and videos have become more popular. In order to reduce the influence of shake on photos and movies, image stabilization system, also known as the anti-vibration system, has been standard features for cameras and videos. For telescopes, the observations will be affected by shake too, so image stabilization system is also important for telescopes.At present, most of the large telescopes have been equipped with anti-vibration function. But most of the hand-held telescopes with image stabilization function on the market are from America or Japan, and in our country, the study of image stabilization system for hand-held telescopes still lags behind. In this paper, a suited image stabilization system is developed for hand-held telescopes to reduce the influence of shake.The mechanical image stabilization method is analyzed in this paper. To eliminate the influence of the shake of observer's hand, the limited angle torque DC motor is used to control the active optical component and change the light path. As a result, the size of hand-held image stabilization telescopes is reduced and the portability is enhanced. What's more, the fuzzy-adjustable-PID control strategy is used in this paper to improve the image stabilization accuracy and robustness.The contents researched in this thesis are as follows:Firstly, the demand of hand-held image stabilization telescope is analyzed, and its characteristics are researched. As a result, roof prism erecting system is used as an active optical part to compensate the vibration. Secondly, the features and the model of the limited angle torque DC motor are researched, and the limitations of existing image design algorithm are discussed. Then fuzzy-adjustable-PID control is used in this paper and its simulation is introduced. In the end, the hardware and software design are introduced, and the realization of the fuzzy-adjustable-PID strategy on the micro-computer is introduced. The problems in the debugging and commissioning are also analyzed and summarized.