液体大幅晃动类等效力学模型研究.

The dynamics and control for the liquid filled spacecraft are explored based on the equivalent mechanical model of large amplitude liquid slosh. Firstly, a mechanical equivalent model for large amplitude slosh, the moving pulsating ball model (MPBM), is improved by modifying the calculation of the normal force of the MPBM according to the motion law and analytical results for the large amplitude liquid slosh. The improvements on MPBM are validated with the comparisons between the previous published experimental results and the presented numerical simulation. Subsequently, the kinetic equations are built for the liquid filled spacecraft with multiple fuel tanks by using this improved model. The attitude dynamics and control of the liquid filled spacecraft with four liquid filled tanks is investigated. Through the numerical simulation results，it is found that the angular rate，liquid sloshing torque and control torque can be influenced in different ways by the assumed three different tank arrangements. Moreover, the influence of liquid sloshing damping on the attitude control strategy is also studied. [ABSTRACT FROM AUTHOR]