Ascertaining the ballistic trajectory of an electromagnetically driven armature of a coil actuator

摘要

A method for determining the movement time curve of an electromagnetically driven armature of an actuator that has a coil may include: (a) applying to the coil a control signal dimensioned such that the armature undergoes only a partial deviation from the armature starting position without reaching an end position defined by a stop, and reaches the armature starting position again after reaching a turnaround position, wherein the deviation of the armature over time is described at least approximately by a section of a parabola at least between the turnaround position and the starting position, (b) determining the time at which the armature reaches the armature starting position again, (c) determining the speed with which the armature reaches the armature starting position again, and (d) ascertaining the movement time curve of the armature using a mathematical equation that describes the parabola based on the detected time and the detected speed.

主权项

1. A method for correcting the operation of an electromagnetically driven armature of an actuator having a coil, the method comprising:
applying a drive signal to the coil, the drive signal being dimensioned such that the armature:
experiences only a partial deflection from its initial position without reaching an end position defined by a stop, andafter reaching a reversal position, again reaches its initial position, wherein, at least between the reversal position and the initial position, the deflection of the armature as a function of time is described at least approximately by a section of a parabola, determining a time at which the armature reaches its initial position again, determining a speed at which the armature reaches its initial position again, determining a reference movement-time profile of the armature using a mathematical equation described in the parabola based on the detected time and the detected speed, and adjusting a further drive signal to the coil based on the reference movement-time profile of the armature and a predetermined setpoint movement profile to account for tolerances in the actuator or the coil.