Modeling and analysis of unbalance for GyroWheel system

For rotating machineries, unbalance of the rotor is widely existed which plays a bad role resulting in unexpected vibrations, uncertain dynamics and even unstable motions. The GyroWheel system, a typical rotating machine, is an innovative attitude determination and control device, which provides a varying amplitude and direction of the angular moment vector by using a spinning flex-gimbal suspension. In this paper, the uneven mass distribution of the GyroWheel rotor, called unbalance, is modeled and investigated by simulations and comparisons. The results can be utilized to reveal the operating properties, and to develop reasonable unbalance identification algorithm for the GyroWheel system.