Automated Interplanetary Trajectory Planning

Near-optimal geostationary transfer maneuvers with cooperative en-route inspection using hybrid optimal control

“…The coordinates of ρ IJK ðtÞ are converted into the RSW frame according to Eq. (8). The rotation angles are Ω m , inclination, i m , and u m ðtÞ.…”

“…One use for the categorical variables is to select a planet to use for a gravity-assist or an asteroid with which to rendezvous [5][6][7][8]. A second use for the categorical variables is to define the number and sequence of the maneuvers to be performed [7,8]. Finally, recent research has focused on using the categorical variables to determine the type of maneuvers to be performed, in addition to their number and sequence [9,10].…”

“…Englander et al [8] extended the work in [7] by adding a capability to model low-thrust trajectories. They utilized a bi-level algorithm consisting of an outer-loop GA coupled with an inner-loop monotomic basin hopping (MBH) algorithm.…”

“…Recent research on the use of HOC in spacecraft trajectory optimization [5][6][7][8][9][10] has focused on bi-level HOC algorithms with multiple uses for the categorical variables. One use for the categorical variables is to select a planet to use for a gravity-assist or an asteroid with which to rendezvous [5][6][7][8]. A second use for the categorical variables is to define the number and sequence of the maneuvers to be performed [7,8].…”

A Continuation Method for Converting Trajectories from Patched Conics to Full Gravity Models

“…Many authors have addressed ballistic patched conics tour design [9,13,18,19,32,33], but few have presented systematic algorithms for representing the results in nbody ephemeris models. Typically, the transition to the full ephemeris model is made in a single leap, and can stress even the best optimization algorithms tackling the simplest of problems.…”