A MISO sliding mode control for a high speed EMS MAGLEV-vehicle using disturbance estimation

The levitation system of high speed electromagnetic system (EMS) MAGLEV-vehicles has been successfully controlled by sliding mode control (SMC). This nonlinear control method is robust with respect to parameter variations and force disturbances but fails to compensate guideway disturbances just like linear controllers. To maintain the desired robustness and minimize the effect of guideway disturbances SMC is combined with a linear disturbance observer whose weighted output is added to the set point. Various simulations using an extensive nonlinear model show the excellent performance of the new approach.< >