Method for correcting a time-dependent measurement signal of a motor transmission unit as well as a method for detecting wear and/or damage of the same by means of this correction method

Method for correcting a time-dependent measurement signal (M) generated by means of a motor (1.1) coupled on the output side to a transmission (1.2) with regard to the influence of a variable output load and a variable rotational speed, in which the following method steps are carried out:

• a) tapping a measurement signal (M) which is dependent on a torque of the motor transmission unit (1),
• b) generation of a useful signal (N1), which is free of any DC component, from the measurement signal (M),
• c) interval-by-interval determination of RMS values from the measurement signal (M),
• d) generation of a load-corrected useful signal (N2) by an interval-by-interval division of the useful signal (N1), which is free of any DC component, by the interval-specific RMS values,
• e) time-resolved determination of the rotational frequency (f) of the motor (1) from the measurement signal (M),
• f) scaling the load-corrected useful signal (N2 to the mean rotational frequency to generate a corrected measurement signal (Mcorr), and
• g) use of the corrected measurement signal for fault detection of the motor transmission unit.