Development and validation of an Electromagnetic Formation Flight simulation as a platform for control algorithm design

Abstract

Electromagnetic Formation Flight (EMFF) consists of using electromagnetic forces to position or orient satellites in a relative target location or attitude and achieve a certain target formation on orbit. This thesis introduces the fundamental equations of EMFF and the design of the Resonant Inductive Near-Field Generation System (RINGS). RINGS is a testbed composed of two vehicles that are used to demonstrate EMFF in a 6 DoF environment. In this thesis, a RMS current level controller is modeled and implemented in RINGS to give the system electromagnetic actuation capability. Subsequently, a simulation of RINGS that incorporates an EM dynamics model applicable to two RINGS vehicles operating in close proximity is developed. This model was validated using a set of open-loop maneuvers by comparing it with data obtained from experiments using the RINGS aboard the International Space Station (ISS). Finally, this simulation was used to test linear controllers that incorporate an 'Adaptive Control' approach to achieve system stability for a specific configuration and range of disturbances.