模糊邏輯模式應用於飛行控制系統之增益資料

Abstract

本論文是針對R. W. Brumbaugh在1991年美國航空太空學會會議中所 提出之高性能飛機模型進行飛行控制之研究，以設計出飛行控制器使飛機 能執行水平加速、等速爬升和水平轉彎三種飛行動作。本論文先分析飛機 各子系統的特性，並推導出線性的模式，接著利用LQR(Linear Quadratic Regulator)的理論設計每個操作點的狀態迴授增益，然後用增益調變法( gain scheduling)得到全部操作區域的控制器。 增益調變法有其優 缺點，其優點是理論簡單、控制器容易設計、實用性高。其缺點是需記憶 大量增益資料、切換增益時會有暫態跳動現象。本論文提出以模糊邏輯模 式(Fuzzy Logic Model)改善其缺點。最後模擬結果顯示，三種飛行動作 均可執行且符合系統規格。 This thesis studies flight control according to high performance aircraft model at American Institute of Aeronautics and Astronautics Conference in 1991 to design flight controller to make aircraft execute three maneuvers including level acceleration, climbing with uniform climbing rate and level turning. The thesis first analyses features of aircraft subsystems and derives linear model and applies LQR theory to design the state feedback gains of each operating point and finally, by using gain scheduling, to get the controller of the whole operating range. Gain scheduling has advantages and disadvantages. The advantages include simple theories, easy design of controller and high practical use. The disadvantages include great amounts of memory gain information, and the trainsient jumping phenomenon when changing gain. The thesis brings forward fuzzy logic model to improve disadvantages. The final simulating results appears three maneuvers all can be executed and meet system specifications.