Patent ID: 6043620
Filing Date: 2000-03-28
Classification: H02H

Abstract:
A method for moving a power-operated closure part over a travel path with an actuator including a drive shaft for the closure part, said method comprising:defining a limiting value of a predetermined rotational parameter of the drive shaft as a profile based on a respective drive energy of the actuator for each position of the travel path and a stored kinetic resistance of the actuator for each position of the travel path;generating an associated drive energy profile of the actuator by measuring an actual drive energy of the actuator for each position of the travel path;generating a tolerance band limit that envelops the associated drive energy profile but does not cross the profile of the limiting value with respect to the predetermined rotational parameter; andwhenever a current drive energy of the actuator overshoots the tolerance band limit without crossing the limiting value, adjusting the tolerance band limit to envelop the current drive energy;adjusting the profile of the limiting value in accordance with the adjusted tolerance band limit, to provide an updated profile of the limiting value; andinitiating a closing force limitation whenever the current drive energy of the actuator crosses the limiting value of the predetermined rotational parameter.