Simulation of stable take-off of mini-RPV

The flight system of mini-Remotely Piloted Vehicle (RPV) using rocket booster to take off, composed of RPV and booster, may be instable during taking off. Whether or not the RPV takes off normally and stability is the first key problem to complete flying tasks. The paper accounts for what conditions correlate its stable take-off characteristics. Because the flying speed increases continuously from zero, and the thrust of the rocket booster is tens times larger than that of engine under the take-off stage, the dynamic model of RPV can´t be expressed by linear equations of constant coefficient. By analysing computer simulation results, we come to following conclusions. The leading factors affecting stable take-off are, the angle A between thrust line of rocket booster and RPV fuselage axis, the thrust of rocket booster, (or ratio of thrust to weight), position of the centre of gravity, and longitudinal and lateral displacement between thrust line of rocket and centre of gravity. The relationship between these factors shown as curves has been obtained and illustrated in the paper