METHOD FOR REDUCING LOW-FREQUENCY VIBRATIONS IN THE DRIVE TRAIN OF A MOTOR VEHICLE

摘要

The invention relates to a method for reducing occasionally occurring vibrations, in particular chatter vibrations of a unit controlled automatically by an actuator, in particular a clutch actuator, on the basis of a target torque assigned to a clutch torque that is to be transmitted, in particular a target clutch torque, in particular a unit located in a drivetrain of a motor vehicle between a combustion engine and a transmission, in particular a friction clutch having an actual present clutch torque which is marked by vibrations as a result of occasionally occurring vibrations, wherein from an input signal which is representative of the vibration-marked torque on the basis of a known transfer behavior of the actual present torque vibration components of known form with unknown prefactors are continuously ascertained, a phase-correct correction torque is determined from these, and the target torque is corrected using the latter. In order to be able to separate a plurality of vibration components from one another and resolve them, an estimation model is made the basis of the input signal, and by means of the estimation model the prefactors are determined on the basis of a recursive method of the smallest square errors.

主权项

1. A method for reducing occasionally occurring vibrations of a unit controlled automatically by an actuator based on a target torque assigned to a clutch torque that is to be transmitted, comprising from an input signal which is representative of a vibration-marked torque on the basis of a known transfer behavior of an actual present torque, continuously ascertaining vibration components of known form with unknown prefactors, determining a phase-correct correction torque from the vibration components of known form with unknown prefactors, and correcting the target torque using the phase-correct correction torque, wherein the input signal is based on an estimation model, and the method further comprises determining the prefactors based on a recursive method of smallest square errors.