Journal Article10.2514/1.G000347
All-Electric Spacecraft Precision Pointing Using Model Predictive Control
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TL;DR: An attitude control system (ACS) for spacecraft equipped with cold gas and electrothermal xenon microthrusters with a model predictive control approach is presented and its performance is compared with different control laws involving on/off actuators.
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Abstract: Recent technological advances in the development of electric microthrusters pave the way to the successful diffusion of all-electric spacecraft. Since pointing accuracy is a key requirement for space platforms, suitable control systems accounting for the peculiarity of electric on/off actuators have to be devised. In this paper, an attitude control system (ACS) for spacecraft equipped with cold gas and electrothermal xenon microthrusters is presented. The number of thruster firings, which has a key impact on the thruster lifetime, is explicitly taken into account in the control design phase. By adopting a model predictive control (MPC) approach, a cost functional including both fuel consumption and number of firing cycles is minimized at each time step, within a receding horizon scheme. The effectiveness of the proposed ACS is validated on a sample GEO mission and its performance is compared with different control laws involving on/off actuators.
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Citations
Station keeping and momentum management of low-thrust satellites using MPC
TL;DR: Numerical simulations of the MPC policy in closed-loop with the satellite nonlinear dynamics under high-precision orbit propagation provided by Systems Tool Kit that validate the performance of the proposed design in terms of thruster usage and constraint enforcement are presented.
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Soft landing on an irregular shape asteroid using Multiple-Horizon Multiple-Model Predictive Control
TL;DR: In this paper, a predictive framework including a heuristic guidance law named Predictive Path Planning and Multiple-Horizon Multiple-Model Predictive Control was introduced for soft landing on an irregular-shaped asteroid.
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Electric Satellite Station Keeping, Attitude Control, and Momentum Management by MPC
TL;DR: To handle the ON–OFF nature of the thruster while retaining low computational burden, a strategy for quantizing the continuous thrust command is developed, which also allows for trading off the number thrust pulses and fuel consumption.
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MPC for coupled station keeping, attitude control, and momentum management of GEO satellites using on-off electric propulsion
David Evan Zlotnik,Stefano Di Cairano,Avishai Weiss +2 more
- 01 Aug 2017
TL;DR: The MPC policy is shown to satisfy all station keeping and attitude constraints while managing stored momentum, enforcing thruster constraints, and minimizing required delta-v.
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Minimum switching control for systems of coupled double integrators
TL;DR: This paper studies the minimum switching control problem for a system of coupled double integrators with on-off input signals, in the presence of a constant disturbance term, and proposes two solutions in terms of steady state limit cycles.
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