對於視距外之長距離飛行的無人飛行載具來說，自動駕駛系統是整個工作的關鍵核心；大部分的無人飛行載具系統其姿態感測工具多是採用傾斜儀或者陀螺儀，不過好一點的感測工具大多動輒數千元至萬元之譜，相當的昂貴。本論文即是希望發展出一種便宜且簡單的無人飛行載具姿態量測裝置，有別於以往利用傾斜儀或陀螺儀做為姿態量測的方式，進而降低無人飛行載具的製作發展成本。
吾人運用場效應電晶體與地球靜電場的特性所設計的姿態感測器，是在機翼兩端各安裝一個場效電晶體，當飛機機翼傾斜時，場效應電晶體會量測到機翼兩端的地球靜電場電壓變化，從而得到飛機雙邊機翼的滾轉角速度。在測試時，吾人利用壓電式陀螺儀當作測試時的標準參考訊號，進而繪出姿態感測器角速度與輸出電壓之間的關係曲線。

For an UAV, autopilot system is the key for long distance flight, especially for out-of-view flight. In most of UAVs, the attitude-measuring sensor always uses tilter or gyroscope, but sensors with better quality often cost several thousand to ten thousand NT dollars or even more. That is too expensive. The objective of this thesis is to develop a simple and cheap attitude measuring equipment for UAV, differing from the traditional way that uses tilter or gyroscope, so as to reduce the developing cost of an UAV.
The design concept of our attitude sensor is to use the field effect transistor（FET）and the characteristic of the earth electrostatic field, by installing a outboard FET on the both wing tips. When the wings of the airplane are atilt, the FET will measure the voltage difference of the Earth Electrostatic Field between the wing tips, and the rolling angular velocity of the wings can be attained. When testing, we use the data obtained by piezoelectric gyroscope as the reference standard signal, and plot a relationship curve between angular velocity of the attitude sensor and the FET output voltages.

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