Aerocapture Guidance Performance for the Neptune Orbiter

摘要: A performance evaluation of the Hybrid Predictor-corrector Aerocapture Scheme (HYPAS) guidance algorithm for aerocapture at Neptune is presented in this paper a Mission to and moon Triton 1 . This mission has several challenges not experienced previous assessments. These challengers are very high arrival speed, atmospheric exit into energy orbit about Neptune, ballistic coefficient that results low altitude acceleration capability when combined with aeroshell L/D. The includes definition entry corridor, comparison theoretical optimum performance, responses variations density, aerodynamic coefficients flight path angle various vehicle configurations (ballistic numbers). benefits utilizing angle-of-attack modulation addition bank improve also discussed. show despite large sensitivities apoapsis targeting, performs within allocated ∆V budget using only modulation. as little ±5 degrees amplitude significantly improves accuracy final apoapsis. Although complicates design its enhancement reduces risk propellant consumption needed reach target orbit.