Research On Modeling And Simulation Of Coupled Rigid-flexible Dynamics For Spacecraft With Flexible Appendages

With the development of technology,the modern spacecraft equipped with large-scale spacecraft flexible structure are commonly applied in the space industry,which gives rise to the stunning development of coupled rigid-flexible dynamics of flexible appendance.The coupled rigid-flexible dynamics is featured with the concurrence of elastic deformation effect coupled with rigid body motion and coupling effect generating along the concurrence.Thereby,the spacecraft dynamics is complicated.Consequently,we need to acquire the essence of coupled rigid-flexible dynamics.This paper deduces the Hamilton's principle effecting in linear elastic materials and nonlinear elastic materials,implements the simulation and analysis by setting cantilever and nonlinear cantilever as examples.The paper deduces the Hamilton's principle in rigid body dynamics,and implements the simulation and analysis towards the attitude regulation of a rigid body loaded with moments.Through the Hamilton's principle in coupled rigid-elastic dynamics,this paper establishes the Hamilton's principle in coupled rigid-elastic dynamics.Through deducing the stationary of Hamilton's principle in coupled rigid-elastic dynamics,this paper establishes the coupled rigid-elastic dynamical model.The paper simplifies the solar panel as the Euler-Bernoulli beam,and implements the simulation and analysis of its vibration response.Through the Hamilton's principle in rigid flexible coupled dynamics and rigid body dynamics,the paper establishes the Hamilton's principle in coupled rigid-nonlinear elastic dynamics.Through deducing the stationary of Hamilton's principle in coupled rigid-nonlinear elastic dynamics,the paper establishes the rigid-nonlinear elastic coupled dynamical model.Appling the Lagrange equation,this paper establishes the governing equation of coupled rigid-elastic dynamics.Approving the Lagrange equation can be applying into continuum mechanics,but also proves the availability of Lagrange equation in research of coupled rigid-flexible dynamics.