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http://dx.doi.org/10.5139/JKSAS.2005.33.9.073

A Study on HAUSAT-2 Momentum Wheel Start-up Method  

Lee, Byung-Hoon (한국항공대학교 대학원)
Kim, Soo-Jung (한국항공대학교 대학원)
Chang, Young-Keun (한국항공대학교 항공우주 및 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.9, 2005 , pp. 73-80 More about this Journal
Abstract
This paper addresses a newly proposed start-up method of the HAUSAT-2 momentum wheel. The HAUSAT-2 is a 25kg class nanosatellite which is stabilized to earth pointing by 3-axis active control method. A momentum wheel performs two functions. It provides a pitch-axis momentum bias while measuring satellite pitch and roll attitude. Pitch control is accomplished in the conventional way by driving a momentum wheel in response to pitch attitude errors. Precession control and nutation damping are provided by driving the pitch axis magnetic torquer. A momentum wheel is nominally spinning at a particular rate and changes speed. This simulation study investigates the feasibility and performance of a proposed strategy for starting-up the wheel. A proposed strategy to start-up the wheel shows that a pitch momentum wheel can be successfully started-up to its nominal speed from rest and be stabilized to nadir pointing.
Keywords
Pitch Bias Momentum; Momentum Wheel; Magnetic Torquer; Micro/Nano Satellite;
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