由於無人飛行器具有重量輕、攜帶方便且機動性高的優點，其應用範圍和領域逐漸擴大。目前在無人載具的控制技術上，為了使載具更穩定，通常會回饋其姿態來控制，所以如何獲得載具姿態的訊息是非常重要的一個課題。而現在最主要的作法就是購買姿態儀。但其價格昂貴、資料更新低，且不一定能滿足我們飛行的需求，而本研究的目的就是在於自行研發一個運動感測器，以提供載具控制時所需的訊息。
在這個研究中，我們使用MEMS(Micro Electro Mechanical Systems)的感測器，並搭配運算功能強大的ARM 7系列微處理器。過程中，我們建立完整的演算法模型，並自行撰寫程式與監控軟體來驗證整個理論。

Because of the advantage of light weight, high mobility and easy to carry, the range of applications for unmanned aerial vehicle (UAV) are expended gradually. When we talk about the control technology for unmanned aerial vehicle, we usually feedback the attitude of UAV to the control system in order to make it more stable. So, how to get the attitude information of vehicle is a very important issue. And now, buying the attitude instrument is the main approach for us. But the cost of attitude instrument is very expensive and the update rate is too low to meet the needs of our flight. The purpose of this paper is to develop a motion sensor which can supply the information of UAV to the control system.
In this paper, we use the low cost MEMS-Based sensors with powerful ARM 7 series processor. We build the complete model for algorithm and we also write the code and software to verify the whole system.

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