Model Predictive Control of an Underactuated Spacecraft with Two Reaction Wheels

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/143105/1/1.G000320.pd

Underactuated Spacecraft Switching Law for Two Reaction Wheels and Constant Angular Momentum

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/140660/1/1.g001680.pd

Recovering Linear Controllability of an Underactuated Spacecraft by Exploiting Solar Radiation Pressure

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/140657/1/1.G001446.pd

Constrained Spacecraft Relative Motion Planning Exploiting Periodic Natural Motion Trajectories and Invariance

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/143124/1/1.G002914.pd

Lagrangian mechanics and Lie group variational integrators for spacecraft with imbalanced reaction wheels

Abstract — This paper presents an analytic dynamic model and a geometric numerical integrator for spacecraft with reaction wheel assemblies. According to Lagrangian mechanics on an abstract Lie group, Euler-Lagrange equations are derived without any restrictive assumptions on the configuration of reaction wheels. This yields the most generalized reaction wheel dynamic model, that can possibly include the effects of arbitrary mass distribution about their spin axes, such as reaction wheel imbalance. The second part is focused on constructing a geometric numerical integrator, referred to as Lie group variational integrator, that provides long-term struc-tural stability in simulating reaction wheel dynamics accurately. These are illustrated by a numerical example. I

Spacecraft momentum control systems

The goal of this book is to serve both as a practical technical reference and a resource for gaining a fuller understanding of the state of the art of spacecraft momentum control systems, specifically looking at control moment gyroscopes (CMGs). As a result, the subject matter includes theory, technology, and systems engineering. The authors combine material on system-level architecture of spacecraft that feature momentum-control systems with material about the momentum-control hardware and software. This also encompasses material on the theoretical and algorithmic approaches to the control of space vehicles with CMGs. In essence, CMGs are the attitude-control actuators that make contemporary highly agile spacecraft possible. The rise of commercial Earth imaging, the advances in privately built spacecraft (including small satellites), and the growing popularity of the subject matter in academic circles over the past decade argues that now is the time for an in-depth treatment of the topic. CMGs are augmented by reaction wheels and related algorithms for steering all such actuators, which together comprise the field of spacecraft momentum control systems. The material is presented at a level suitable for practicing engineers and those with an undergraduate degree in mechanical, electrical, and/or aerospace engineering

Time Shift Governor for Coordinated Control of Two Spacecraft Formations

info:eu-repo/semantics/publishe