Backstepping-based current and voltage control strategy for maglev position device

This study mainly focuses on the backstepping control (BSC) strategy design, including a traditional backstepping control (TBSC) and an adaptive backstepping control (ABSC) for a current control and a voltage control scheme in a maglev position control system, respectively. In the ABSC system, an adaptive estimation for the lump uncertainty is proposed to ensure the system stability. On the other hand, to solve the trouble of chattering phenomena caused by a sign function in TBSC law in despite of the utilization of a fixed value or an simple adaptive tuning algorithm for the lumped uncertainty bound. The effectiveness of the proposed control with current and voltage control schemes can be verified in experimental results.