1 citations · 1 across the 3 of their papers we have counts for
6 papers
Eclipse Observables for Navigation in Cislunar Space
Ian M. Down, James McElreath, Manoranjan Majji
Autonomous navigation independent of Earth-based tracking remains a challenge for spacecraft operating in cislunar space. This paper proposes onboard eclipse detection as an opport…
Many-Revolution Low-Thrust Transfers within Periodic Orbit Families
Ian M. Down
This paper explores the use of a reduced manifold space initialization method for the generation of both time and fuel optimal many-revolution, low-thrust transfers between three-b…
Passively Safe Convex Guidance for Cislunar Rendezvous and Proximity Operations
Ian M. Down, Connor Plaks, Matthew Bolliger +1
This paper presents purely convex programs for passively safe impulsive rendezvous and proximity operations in cislunar orbits. Approach, arrival, and abort maneuvers are all desig…
On-Manifold Low-Thrust Rephasing of Quasi-Periodic Orbits
Ian M. Down, Manoranjan Majji, Kathleen C. Howell
A bi-level optimal control framework is introduced to solve the low-thrust re-phasing problem on quasi-periodic invariant tori in multi-body environments where deviations away from…
Direct Pseudospectral Optimal Control by Orthogonal Polynomial Integral Collocation
Thomas L. Ahrens, Ian M. Down, Manoranjan Majji
This paper details a methodology to transcribe an optimal control problem into a nonlinear program for generation of the trajectories that optimize a given functional by approximat…
A Scalable Tabletop Satellite Automation Testbed:Design And Experiments
Deep Parikh, Ali Hasnain Khowaja, Nathan Long +4
This paper presents a detailed system design and component selection for the Transforming Proximity Operations and Docking Service (TPODS) module, designed to gain custody of uncon…