Elevator controller for leveling process optimization

A controller for optimizing a leveling process of an elevator car at a stopping point for an elevator having an elevator controller which controls a stop of the car at a stopping point as a function of a specified distance X to the stopping point, and/or for an elevator car having a position sensor for detecting position markings and/or for an elevator having an absolute positioning system, comprising a measuring tape fastened in a shaft, a measuring sensor on the car, stored positions, and an evaluation unit for specifying a position of the car,

• wherein the controller is designed, during each of at least three journeys, to record a set of at least one same measured value, to determine a change dX or a changed distance X′ of a set of a current journey and based on properties of at least one past journey and to output the changed distance X′ or the changed dX to the specified distance X,
• wherein the controller is designed to form a group from the respective set, which comprises at least the set together with either the changed dX or the changed distance X′ and/or at least a main value of the set together with either the changed dX or the changed distance X′, and to select the corresponding group of a past journey as a function of a main value of the current journey and the past journey,
• wherein the main value of the set and/or the group assigned to the set is a specific measured value or a function of specific measured values of the underlying set:
• is a function of acceleration and normal travel velocity and/or
• for a travel direction upward is an acceleration and for a travel direction downward is a normal travel velocity, and
• wherein the controller optimizes the leveling process of the elevator car at a stopping point for the elevator based on the change dX or the changed distance X′.