Decoupling control of radial 4 degree of freedom system of magnetic-liquid double suspension bearing based on generalized extended state observer

As the novel suspension bearing, Magnetic-Liquid Double Suspension Bearing (MLDSB) is mainly supported by magnetic and supplemented a liquid hydrostatic bearing. Due to its great bearing capacity stiffness, rapid response, active control, so on, MLDSB suitable for medium speed heavy loads has large carrying high operating stability. In addition, radial inertia coupling gyroscopic between 4-DOF control channels can reduce precision, operation stability, reliability of MLDSB. Therefore, mathematical model rotor-dynamics established in this paper, inherent mechanism explored. Taking inertial coupling, external disturbance as lumped disturbances, decoupled controller based on Generalized Extended State Observer (GESO) established. The influence GESO decoupling performance simulated. results indicate that effect great. Under action step signal, steady displacement, maximum adjustment time, peak time rotor after are all reduced, among which displacement most obvious. sinusoidal reduced 90%, effectively avoid “gap-impact” fault. pulse research paper provide theoretical reference stable support