2023 Volume 31 Issue 3 Pages 413-418
In the triaxial active magnetic bearing (AMB) with an asymmetric structure, interference occurs when it suspends a rotor in the radial and the thrust direction simultaneously. In order to solve this problem, a position control system with a nonlinear compensator has been proposed, but the degradation of its control performance due to disturbance fluctuations remains an issue. Therefore, we propose a variable structure type non-linear control system (VSTNCS) that improves control performance during disturbance fluctuations by varying controller characteristics based on disturbance estimation. First, this paper describes that the accuracy of disturbance estimation when impulse and sinusoidal disturbances are applied is sufficient to use the proposed control system. Next, the effectiveness of the proposed control system with respect to the conventional control system is clarified when the same disturbances are applied.
