Variable Structure Control and Fuzzy Control Applied to Flight Control Systems

• Main Authors: Yon-Huei Jon, 鍾勇輝
• Other Authors: Yon-Ping Chen
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/09484883841764827724

碩士 === 國立交通大學 === 控制工程系 === 82 === The purpose of the thesis is to design flight controller to make aircraft to fulfill the following maneuvers:level flight, climbing ,level turn and level acceleration. The flight controller is designed with variable structure control law and fuzzy control law for a practical flight control system. For the attitude and altitude hold control system,variable structure controller is used to help the aircraft to reject the matching type uncertainty . For the velocity hold control system, we use fuzzy control law to design the thrust controller,it could avoid the "precise modeling" problem. When the aircraft takes an accelerating flight from subsonic to supersonic,the conventional flight controller must use the gain- scheduling approach to overcome the parameter variations due to the change of the velocity. It always increase the complexity for design. The advantage of variable structure controller is its robustness for such time-varying system and its simplicity in design. Because of the nonlinearity and complexity of the engine system,variable structure controller is not suitable. Here we may treat the fuzzy controller as a nonlinear PI- controller,there exists the suitable velocity performance for engine in every different velocity.