| 摘要 |
#CMT# #/CMT# The method involves detecting a measured variable of noise signals produced from a test object i.e. controller, along a set point, where an evaluation of the measured variable is performed under the utilization of cursor lines (2.1-2.5). Signal amplitudes are represented based on a frequency (f) and on the set point in a spectrogram (1). The cursor lines are positioned in the spectrogram corresponding to noise components identified in the spectrogram. A sound pressure and an impact sound are detected as the measured variable. #CMT#USE : #/CMT# Method for evaluating noise of a test object i.e. controller, of an electrical machine that is utilized as a drive in a vehicle e.g. electrical and hybrid vehicles. #CMT#ADVANTAGE : #/CMT# The cursor lines are positioned in the spectrogram corresponding to the noise components identified in the spectrogram, so that the positioned cursor lines make possible for a user to assign the noise components to individual causers, thus achieving an easily understandable visual separation of the noise components from signals of other sources of noise. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a graph representing a spectrogram of a measured variable. f : Frequency 1 : Spectrogram 2.1-2.5 : Cursor lines. |
