Helicopter Parameter Identification Technology Research Under The Considerably Disturbing Condition

This paper analyses and studies the forces and moments acting on a typical helicopter, the nonlinear equation of motion for the helicopter is derived, the maneuvering data of the X-5 helicopter is calculated by nonlinear maths model, the model is compared with linear maths model. The results show that- using this model cuts down more than 50 percent of error incomparison with the linear maths model. In this paper, the proportion of various parts from various time of the maneuver is simultaneously given and the application range of the linear maths model is quantitatively determined.