The position controller is a proportional controller. The set position of the output of the set point generator is the set value of the position controller. The actual value obtained comes from the analog output of the position encoder, and the output of the position controller is the input value of the additional speed set value. The actual position value of the lifting container will closely follow the set position according to the position controller to achieve the ideal position closed-loop control effect, thus ensuring the accuracy of the elevator parking position.