Energy management ascent guidance algorithm with multiple constraints

The ascent guidance for hypersonic vehicle launch mission needs to satisfy multiple constraints. For the solid-powered launch vehicle without burn control, energy management was applied to satisfy the constraints. To achieve the energy management, the basic idea is to control the angle between the thrust and the velocity. Based on the alternate attitude control energy management (AEM) and the general energy management (GEM), the spline energy management (SEM) guidance was proposed, and modified for the constraint that the attitude angle should be constant before separation. A three-stage launch vehicle example was demonstrated. Comparing the AEM, GEM and SEM simulation results, the feasibility of the SEM guidance is verified.