Straight Nine Helicopter Longitudinal Control Law Design And Research

Form the practical engineering point of view, the longitudinal natural stability of Anti-Submarine helicopter is analyzed, the stabilized loop of the pitch angle is systematically studied. This paper is mainly on the design and simulation of the stabilized loop of pitch angle with classic control method and fuzzy control method and many useful results are achieved. The main work of this paper can briefly described as follows:After the mathematical models of aircraft was build with relevant date, the stabilized loop of pitch angel was designed and simulated.Through the study and analysis on the two improved fuzzy controllers, a new designed method of fuzzy controller based on analytically optimal correction function without quantization was presented. The method can eliminate the conventional fuzzy control system's steady-state errors and flutters. Considering wind disturbance, the stabilized loop of pitch angle was designed and simulated with this method. The simulation results show that the performances of the system are satisfactory to flying qualities.