Direct Exploration of the L2 Isolated Invariant Set Using Isolating Neighborhoods - presented by Dr. Rodney L. Anderson | Low-thrust trajectory design for icy moons orbiters using multi-body techniques - presented by Mr Yanis Sidhoum

Direct Exploration of the L2 Isolated Invariant Set Using Isolating Neighborhoods

Dr. Rodney L. Anderson

Low-thrust trajectory design for icy moons orbiters using multi-body techniques

Mr Yanis Sidhoum

Dr. Rodney L. AndersonMr Yanis Sidhoum
Slide at 51:56
Indirect Forward-Backward Shooting Via Resonance Hopping
Yanis Sidh
Mission design leveraging resonance hopping
Nodes fixed on resonance orbit of the promising resonance path
Time of flight of each leg set to the orbital period of the corresponding resonance
Dynamical Model
Input
Output
- Navigate the solution space by 'jumping' between orbital resonance
Unified Mission Design
Resonance path
Resonance orbits
Objective,
Constraints
Dynamical
Trajectory
Astrodynamics
Optimal moon-
system theory
optimization [11]
tour
Low-thrust control & primer vector theory
Small low-thrust controls adjust the flyby geometry
Saturn-Tethys CR3BP
Mission clock time flow
- Only one node per synodic revolution
- Limited number of design variables for control
Saturn-Enceladus CR3BP
Mission clock time flow
PURDUE
School of Aeronautics and Astronautics
UNIVERSITY
Node
Match Point
Forward Shooting
Backward Shooting
Share slide
Summary (AI generated)

In this section, we utilize principles from dynamical system theory to generate a resonance path, which consists of a sequence of resonance orbits that facilitate a near ballistic trajectory. We begin by precomputing the corresponding resonance orbits within a multi-body dynamics framework. This resonance orbit then serves as the initial point for our Indirect Forward-Backward Shooting algorithm.

For the intermittent transfer, we strategically place one node for each synodic revolution around Saturn, with these nodes fixed at the flyby locations. Specifically, for the Saturn-Tethys segment of the transfer, the nodes are anchored at the apoapsis, while for the Saturn-Epimetheus segment, the nodes are positioned at the periapsis. Additionally, the time of flight for each leg of the transfer is aligned with the orbital period of the corresponding resonance orbit.