Flight dynamics and manipulation strategy of compound high speed helicopter
Double-propeller compound high-speed unmanned helicopter,which is currently one of the hottest research topics in high-speed aircraft,has the advantages of both helicopter and fixed wing aircraft.In this paper,the flight-dynamics related analysis and manipulation strategy research of the double-propeller compound high-speed unmanned helicopter are carried out.The aerodynamic interference model of rotor to wing is constructed by using the interference factor,and the fuselage model is based on the wind tunnel test data.Then,the nonlinear flight dynamics model of double-propeller compound high-speed unmanned helicopter is presented.In view of the problem of control redundancy,a manipulation strategy is proposed,which allocates the control channel with the weight coefficient,and controls the forward flight speed by the longitudinal channel of the mean propeller pitch.On this basis,the smooth transition of each rod between the three modes is realized,which verifies the rationality of the control strategy.
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