Optimal control of tiltrotor aircraft transition flight based on T-S fuzzy system
In view of the complex control problem caused by variable mechanical characteristics in conversion maneuver of tiltrotor aircraft,an integrated control method based on T-S fuzzy system and linear quadratic optimal tracking control was proposed.Firstly,the high-confidence flight dynamics model of tiltrotor aircraft was established,and the T-S fuzzy model for controller design was devel-oped based on the fuzzy approximation principle.Then,according to the fuzzy model,the control law was designed by combining the control strategy switching with parallel distributed compensation controller,and the control set with smooth switching was obtained by using linear quadratic optimal tracking control method.Finally,the flight simulation of the tilting conversion process was carried out,and the designed control law was verified.The results show that the fuzzy optimal control meth-od established in this paper can realize the precise control of tiltrotor aircraft conversion process,and the smoothness of state response and controller output can be significantly improved.
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