The Linear Auto disturbances rejection controller Application in Beam Magnetic Suspension System of Gantry Moving Type Numerical Control Machine Tool

摘要

When gantry-moving type numerical control machine works, support beams of the maglev system will exist outside disturbance, internal system parameter variations and unmodeled dynamics and so on, these factors will reduce system processing accuracy. We presented that suspension air-gap of beam suspension system was controlled by using the auto disturbance rejection control technology. The auto disturbances rejection controller can regard system model parameter variations and external disturbance influence of system as comprehensive disturbance, automatic on-line estimation and compensation. Meanwhile, for solving the traditional auto disturbances rejection controller's problems which are much more parameters and complex parameters adjustment, the linear auto disturbances rejection controller was used. Under the precondition of ensuring control effect, parameters adjustment process of the auto disturbances rejection controller was greatly simplified. The simulation results show that beam magnetic suspension system using the linear auto disturbance rejection control scheme can achieve control requirements and achieve beams friction-free stable suspension.