Synthetic modeling method of rotor and airframe coupling dynamics modality
A technology of coupled dynamics and modeling methods, applied in the field of helicopter dynamics design, can solve problems such as the lack of research on multi-rotor helicopter rotor and airframe modeling and analysis methods, and achieve the effect of reducing scale, significant economic benefits, and reducing errors
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[0045] The dynamic modeling method of the multi-path power transmission rotor hub structure involved in the present invention will be further described in detail below with reference to the accompanying drawings.
[0046] Step 1: Define the coordinate system and conversion relationship
[0047] (1) figure 1 The coordinate system of the airframe and rotor hub is defined as shown. {Og,Xg,Yg,Zg} is the ground fixed coordinate system, the coordinate vector is expressed by {ig,jg,kg}, and the aircraft gravity is along the -kg direction. {O f ,X f ,Y f ,Z f } Is the body coordinate system, the coordinate origin Of is at the center of gravity of the whole machine, and the coordinate vector is {i f ,j f ,k f } Means that the 6 degrees of freedom of motion of the body relative to the coordinate system {ig,jg,kg} are X f ,Y f ,Z f , X f Forward is positive, Z f Up is positive, Y f The positive direction is determined by the right-hand rule.
[0048] {O H ,X H ,Y H ,Z H } Is the rotor hub co...
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