By Topic

An optimal sensor placement strategy for force and torque analytical models of a reaction sphere actuator for satellite attitude control

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Rossini, L. ; Syst. Div., Swiss Center for Electron. & Microtechnol. (CSEM), Neuchatel, Switzerland ; Onillon, E. ; Chetelat, O. ; Perriard, Y.

This article presents an optimization strategy to position magnetic flux density sensors in a reaction sphere actuator. The reaction sphere consists in a magnetic bearings spherical rotor whose rotation axis can be electronically controlled. The actuator is composed of an 8-pole permanent magnet spherical rotor and of a 20-coil stator. Force and torque analytical models of the actuator are parameterized using 7 decomposition coefficients that deliver to the models all the necessary information relative to the orientation of the rotor inside the stator. These coefficients are determined non-iteratively and in a linear fashion by measuring the radial component of the magnetic flux density from at least 7 different locations. The proposed optimization procedure consists in minimizing the condition number related to the linear estimation problem of the coefficients so as to minimize the influence of the measurement noise on force and torque relative errors. Finally, numerical simulations confirm the effectiveness of the proposed optimization strategy.

Published in:

Electrical Machines (ICEM), 2012 XXth International Conference on

Date of Conference:

2-5 Sept. 2012