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This paper presents a method of improving the attitude determination accuracy for nanosatellites with the aid of the camera sensor. In typical mission, the star tracker is usually used as an optical sensor for the precise attitude pointing for the nanosatellite. However, mostly, the star tracker cannot be affordable for most of the missions because of its cost. Instead of using the star tracker, the...
Hemispherical resonator gyroscope is one of the vibratory gyroscopes that can work as an angle sensor as well as an angular rate sensor. Vibratory gyroscopes have advantages that it has relatively long operation time since it has no moving part, it has relatively larger measurement range, and so on. These types of gyros are based on the principle of Coriolis effect. To operate the vibratory gyros,...
An adaptive feedback linearization technique combined with neural networks is addressed for the momentum transfer control of a torque-free gyrostat with an attached spring-mass-dashpot damper. The input normalization neural network is used to adaptively compensate for the model error uncertainties of a nutation damper as an internal dynamics and avoid the unnecessary assumptions for stability analysis...
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