抄録
Guidance methods for the atmospheric flight part of a Venus aerocapture mission are studied. A lifting entry vehicle is to be used, and in-plane atmospheric path is to be controlled through the bank angle modulation, while out-of-plane motion is left open. Three control laws for bank angle, 1) Shuttle-like law with altitude rate h´ and drag deceleration D feed-back, 2) a simple system with only D feed-back, 3) an explicit law which finds required lift-to-drag ratio from precalculated relationship as a function of D and velocity V, are considered. Numerical simulations are carried out in the presence of atmospheric modeling error and pre-encounter guidance error, and each law is evaluated in terms of final orbit apoapsis altitude dispersion or total drag deceleration dispersion.
