Abstract:

To ensure the validity and maneuverability of the model, the dynamic analysis approach of moving mass reentry vehicle (MMV) is proposed based on the singlebody. This approach designs attitude dynamics parameters relying on qualitative analysis, by using overload and internal forces, and then writes attitude and moving mass kinetics complete equations. These equations can guarantee the MMV mobility, and reduce coupling of the system. The simplified equations are affine nonlinear equations. Compared with the attitude response of the precision equations, the deviation in angle of attack is within 0.01°. Thereby the method can reduce the technical difficulty of designing autopilot.

Key words: reentry vehicle, flight dynamics, moving mass, modeling, integrated design