衛星科技歷經半個世紀的蓬勃發展正朝向另一階段—袖珍(miniature)紀元邁進。Standford大學的OPAL計畫成功地將四顆重約一公斤的picosatellite送入太空。美國幾個大學也在空軍、國防部及太空總署等的支援下積極發展微微衛星(nanosatellite)之相關科學與技術。在這波袖珍衛星的熱潮中，國內太空計畫室也交出了漂亮的成績，自製的CubeSat體積與重量雖小卻具備完整的衛星功能(推進次系統除外)。有鑑於國內在衛星科技經驗的逐漸累積與未來微微衛星發展的潛力，我們希望藉由參與與YamSat後續發展之委辦計畫，帶動中央大學相關科系之教授與學生學習並改良現有國產之picosatellite，將袖珍衛星科技引進校園，除教育與研究目的外亦為國內微微衛星後續發展之長期規劃進行先期可行性評估。YamSat為太空計畫室自製之第一顆人造衛星，在體積與重量的局限下，仍能保有各個次系統之功能與完備並載有一微光譜儀實屬設計上之巧妙。但由於picosatellite為發展中之科技，其設計極限或所謂的最佳設計仍是挑戰太空工程師與科學家最有趣的問題。本計畫為期一年，研究群包括太空科學、機械、電機與通訊之教授與學生，希望針對YamSat之七個次系統包括：結構與機構、熱控、姿態控制、指令及資料處理、通訊、電力及科學酬載次系統，提出設計改良分析與評估。這些次系統目前存在或多或少之改良空間，例如結構體之模組化及改善衛星之熱控制。而現有姿態控制使用磁力計與磁圈只能達到單軸控制，且太陽能板由於貼於10公分立方體衛星的六個面，所能提供的電源非常有限。此外，由於重量的限制與有限的電力及姿態控制的能力，科學酬載的規格也需要特別的設計。而在不造成額外的電力負擔下，如何增進指令及資料處理之速度及提昇上傳下載通訊傳輸功能等都將是本研究計畫所欲探討之問題。 For nearly fifty years after the launch of the first satellite in 1957, the enterprise of satellite science and technology has undergone very rapid development and is now entering a new era of miniaturization of current satellite technology. The OPAL project conducted by Stanford University has successfully deployed four picosatellites into the space orbit. Under the support of U.S. Air Force and Department of Defense as well as NASA, ten U.S. universities are funded for the development of nanosatellite related science and technology. In this wave of mini-satellite fashion, our NSPO also promptly participated in the development of picosatellite and has delivered a complete cube satellite early this year.In light of the buildup of considerable experience and capability with satellite science and technology in Taiwan for the last ten years and the potential application of miniaturized satellite, we would like to promote the development of picosatellite at National Central University by initially proposing a one year project of YamSat Subsystem Improvement in response to the research opportunity announced recently by National Space Program Office. Other than research and educational purpose, the objective of this project is on the feasibility study of improved design for various satellite subsystems that may provide valuable reference and suggestion to the future long term planning of mini-satellite development in Taiwan.YamSat is the first satellite manufactured entirely by the NSPO engineers; it weighs less than 1 kg and occupies a limited volume of . Though small and light, it possesses all essential subsystems (expect for the propulsion subsystem) and even carries a scientific instrument of microspectrometer. Since picosatellite is still a newly developing technology, the YamSat design though considered neat still allows room for improvement. Our working group consists of NCU faculties and students from the Institutes of Space Science, Communication and Departments of Electrical Engineering and Mechanical Engineering with space science and engineering backgrounds and is equipped with good knowledge on the present YamSat design and function. The proposed research includes the improvement of thermal control and structure/mechanism modal, developing three axis attitude control, increasing the solar power, control & digital handling and up/down link telemetry transfer capability as well as the investigation of various scientific payloads which will need to meet the requirements of limited weight, size and power etc. 研究期間：9106 ~ 9205
