Sang D Lee and Seul Jung
DOB, Velocity observer, real time, CMG
In this paper, a nonlinear disturbance observer (NDOB)-based control framework is designed for controlling the velocity of a gimbal system of a control moment gyroscope (CMG) system. The state observer (SOB) is designed to estimate the velocity by using a multi-layered recursive least squares (RLS) structure for the better identification in real-time. Disturbance is compensated by drift models, which is a function of velocity and acceleration. Consequently, the proposed DOB has a real-time performance in association with the state observer. The proposed method is verified through the experiment.
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