Low-thrust guidance study Final report
Computer algorithm to determine minimum-time optimal control for continuous low-thrust propulsion systems operating in inverse-square gravity field
GRAVITATIONAL FIELD↗
Engineering topics
Fimple, W. R.
Publications and source records attributed to Fimple, W. R..
Application of a finite-difference Newton- Raphson algorithm to problems of low-thrust trajectory optimization.
Low thrust trajectory optimization, using Newton- Raphson method to solve nonlinear two-point boundary value problem
TRAJECTORY OPTIMIZATION↗
Applications of snap-50 class powerplants to selected unmanned electric propulsion missions.
SNAP-50 power plants applied to selected unmanned electric propulsion space missions
NUCLEAR POWER PLANT↗
Application of a finite-difference newton- raphson algorithm to problems of low-thrust trajectory optimization.
Low thrust trajectory optimization, using Newton- Raphson method to solve nonlinear two-point boundary value problem
BOUNDARY VALUE↗
Applications of snap-50 class powerplants to selected unmanned electric propulsion missions
Snap-50 powerplants for unmanned spacecraft propulsion
UNMANNED SPACECRAFT↗
Mission Capabilities of Ion Engines Using SNAP-8 Power Supplies
Mission performance capabilities of ion engines powered by the 30 kw and 60 kw SNAP-8 power supplies are compared for the following missions: a 24-hr equatorial satellite, a 100 n mi lunar satellite, a 500 n mi Mars satellite, a Mercury probe, and an out-of-the-ecliptic probe. The capabilities of arc- jet engines and chemical engines for the same missions are compared with those of the ion engines. The majority of the comparisons are for 8500-lb spacecraft which are boosted into a 300 n mi orbit by the Atlas-Centaur. Variations in initial orbit altitude, the use of actual launch dates rather than dates based on simplifying assumptions, and the combined use of chemical and electrical propulsion systems were also evaluated in terms of their effect on mission performance.
IONIC PROPULSION↗