Flight Dynamics Modeling and Rigid-flexible Coupling Order Analysis for Flexible Flight Vehicle
Based on virtual power principle and hybrid coordinate method,the flight dynamic model for flexible flight vehicle is established.It is found that the components attached to the flexible structure will have an effect on the attitude and orbit motion and the structure vibration of the flight vehicle,so the correction terms of the coupling coefficient and modal mass are given.The rigid-flexible coupling order is defined to describe the degree of flexible deformation term retention.Taking a rigid-flexible coupling multibody system consisting of a flexible body and a rigid rudder as an example,by comparing the time-domain response of the dynamic model and the momentum calculation results of the conservative system under different rigid-flexible coupling order,the influence of the retention order of the flexible deformation term in the dynamic model and momentum formula on the dynamic response and momentum calculation accuracy is analyzed.The error level caused by the traditional model ignoring the high-order term of flexible deformation is revealed,which provides a reference for the simplification and verification of the dynamic model for flexible flight vehicle.
Flexible flight vehicleCoupling dynamicsRigid-flexible coupling orderVirtual power principleHybrid coordinate method
万方数据
维普
