Robust control of a permanent magnet linear motor in the presence of large disturbances

The paper presents a robust tracking controller design for a short-stroke permanent magnet motor as a linear drive. For the desired application a very high dynamic is required despite the presence of large disturbances. After the model description, a flatness based control is presented to force the system following a reference trajectory. Additionally, a robust feedback control, based on system inversion, is used to stabilize the tracking against external disturbance signals, model and initial errors. Moreover, a particular control scheme is proposed to ensure bounded control inputs.