Optimization of Low-Thrust Heliocentric Trajectories with Large Launch Asymptote Declinations

Autor:	Frederick I. Mann, Jerry L. Horsewood
Rok vydání:	1975
Předmět:	Offset (computer science) Optimization problem Ion thruster Computer science business.industry Range safety Aerospace Engineering Thrust Parking orbit Propulsion Aerospace engineering Asymptote business
Zdroj:	AIAA Journal. 13:1304-1310
ISSN:	1533-385X 0001-1452
DOI:	10.2514/3.60543
Popis:	The problem of optimizing electric propulsion heliocentric trajectories, including the effects of geocentric launch asymptote declination on launch vehicle performance capability, is formulated and a solution is developed using variational calculus techniques. The model of the launch vehicle performance includes a penalty associated with noneasterly launch plus another penalty arising from a noncoplanar launch from the parking orbit. Provisions for range safety constraints are included. The solution of the resultant optimization problem requires that the launch excess velocity be offset from the initial primer vector. Mission performance for example cases shown indicate a small to moderate performance degradation compared to corresponding cases where declination effects are ignored.
Databáze:	OpenAIRE
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