A novel fuzzy PID velocity control of linear elevator driven by the permanent magnet linear synchronous motor

A correction factor fuzzy-PID control method is adopted in order to solve the vibration of elevator cab because of the edge effect in the linear elevators driven by the permanent magnet linear synchronous motor (PMLSM). The fuzzy control has the characteristics of being not completely dependent on the mathematics model, but the fuzzy control rules are obtained by experiences of authors or knowledge of experts. The correction factor fuzzy-PID can adjust the fuzzy rules, and so it has adaptability. This method can reduce the vibration influence of edge effect on elevator cab. The simulations show that system has good tracking ability and inhibit the fluctuation of the thrust resulting from edge effect. So the elevator cab will become more comfortable and suitable for people.