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Polarity Verification of Direction Cosine Matrix of Gyro Sensor Using The Earth Rotational Rate  

Oh, Shi-Hwan (한국항공우주연구원 다목적5호체계팀)
Kim, Jin-Hee (한국항공우주연구원 다목적5호체계팀)
Publication Information
Aerospace Engineering and Technology / v.10, no.2, 2011 , pp. 49-55 More about this Journal
Abstract
A Direction Cosine Matrix (DCM) of each satellites sensor/actuator which contains an directional information of sensor/actuator is implemented in the on-board flight software. In order to verify the polarity of direction cosine matrix, it is mostly used that an actual sensor/actuator output is compared with the expected output value which responses to the pre-defined external stimulus to the sensor/actuator. For the gyro sensors, the Earth rotational rate can be used as an external input for the polarity verification of DCM, without using an artificial stimulus. In this study, the polarity of gyro DCM is checked and verified using the several test data which have been acquired during the different system level test phases. Finally the polarity of DCM was successfully verified using the Earth rotational rate.
Keywords
Satellite; Gyro Sensor; DCM; Earth Rotational Rate;
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