A Low-speed, Low-acceleration Controller for Cost-effective Reaction-wheels

Design, Simulation & Implementation

Master thesis (2021)

Authors

W.A. Lopes Electrical Engineering, Mathematics and Computer Science

Contributors

A.J. van Genderen Computer Engineering - (mentor)

S. Hassan HosseinNia Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering (graduation committee member)

Bert Monna Hyperion Technologies (coach)

J.S.S.M. Wong Computer Engineering - (coach)

Faculty

Electrical Engineering, Mathematics and Computer Science, Electrical Engineering, Mathematics and Computer Science

FPGA Control Observer Trajectory generation Hall-sensor Sigma-delta PI Low-speed Reaction-wheel Low-acceleration Low-torque Torque-friction

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More Info

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Published Date

17-12-2021

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

With the requirements for CubeSats increasing, a push towards utilizing highperformance equipment has
never been greater. Incorporating these equipment in an environment that is cost, space and
powerconstrained, is challenging. Simultaneously, highperformance equipment require high
pointingaccuracy and lowjitter. This thesis proposes the use of a costeffective reactionwheel, which
utilizes three hallsensors for accurate attitudecontrol. Additionally, the requirements state that the
reactionwheel operates in the lowspeed region, whilst tracking lowacceleration commands. For this, a
controllerstructure is designed, simulated & implemented in order to provide accurate angularvelocity
estimates at a constant rate. Whilst the angularvelocity estimates are within 1% of the measurements, the
angularacceleration tracking performance relies greatly on the noise of the reactionwheel torquefriction.
Nonetheless, the angularacceleration mean error was found to be 0.005 RPM/s, with a variance of 0.3
RPM/s on a 0.01 RPM/s reference

Files

MSc_Thesis_WALopes_4462653.pdf

File under embargo until 22-12-2026