| Summary: | 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.
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