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Dynamics and control of flexible satellite using reaction sphere actuators - EurekAlert
Recently, the magnetically suspended reaction spherical actuator (RSA) in attitude control of satellite received much attention in the literature. The compact size and low weight of RSA make it suitable for small satellite and space robotics applications. Several studies have suggested the use of control moment gyro (CMG)-based mechanism actuators for attitude control of flexible satellites. However, friction in the CMGs can cause hysteresis and backlash, leading to control errors and reduced accuracy of the attitude control system. Moreover, the vibration of the CMGs can introduce unwanted disturbances into the satellite’s motion, affecting the pointing stability and performance of the attitude control system. In contrast, magnetically suspended reaction sphere actuators are frictionless and have low vibration, making them a promising option for attitude control of flexible satellites. In a research article recently published in Space: Science & Technology, scholars from Nanjing University of Aeronautics and Astronautics and York University propose the attitude stabilization of spacecraft considering the vibration suppression of flexible appendages with magnetically suspended reaction sphere actuators.
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