Modeling and Simulation of Flight Dynamics of Variable Mass Systems

This paper derives the equations of motion of varia ble mass systems using a coordinatefree approach. These equations have been verified with simple models, and the terms originating in the steady and unsteady gas-dynamic interaction effects have been used in the modeling and simulation of the propulsive phase of the Supersonic Inflatable Advanced Decelerator when the vehicle is spinning. The varia ble mass terms have an effect both the translation and the rotation of the vehicle during thrust, indicating an increase in the roll rate.