Multidisciplinary Optimization of StarBody Waverider Shapes for Lifting Aerocapture with Orbital Plane Change

Abstract

A conceptual study is performed to evaluate the concept of combining orbital plane change into a lifting aerocapture maneuver. A unique method of parameterizing a specific class of waverider that would be especially applicable to these maneuvers is presented. Aerodynamic and trajectory models are used to characterize their performance. A simplified control system is modeled in order to assess the effectiveness of such geometries in accomplishing desired mission objectives. A gradient based routine has been run to perform coupled vehicle shape and trajectory optimization. It is found that with high-performing aerodynamic designs, considerable plane change is possible, on the order of 85 degrees, as well as successful capture into a low apoapsis orbit. General guidelines are given for the limitations of the application of aerodynamic plane change. Finally, conclusions are reached about the ideal characteristics of the lifting body, as well as general behavior about the nature of the trajectory. It is found that increasing the plane change of the maneuver has an adverse effect on important design metrics such as maximum g-load and volumetric efficiency.