Method and system for determining the dynamic response of a machine
AssigneeTRUMPF Werkzeugmaschinen GmbH + Co. KG
InventorsThomas Kieweler, Martin Lukas, Martin Schober
Life of this patent
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Abstract
A method for determining a dynamic response of a machine having at least one axis, including performing a measurement run for each axis of the machine over an entire work area of each respective axis, capturing and recording data associated with each measurement run, determining a time-frequency representation of recorded data using a data processing unit, and analyzing the time-frequency representation or a related representation using an image processing algorithm.
Claims14
A method for determining a dynamic response of a machine having at least one axis, the method comprising:
- performing, by a controller of the machine, a measurement run for each axis of the machine over an entire work area of each axis, using a predefined input signal comprising a constant speed overlaid with an excitation signal;
- capturing, using a sensor associated with each axis, output data associated with each measurement run in realtime, the output data comprising a current drawn by a drive of each axis or a speed of the drive;
- recording the output data in a data storage unit;
- determining a time-frequency representation of the output data using a data processing unit;
- converting, using the data processing unit, the time-frequency representation of the recorded data into a location-frequency representation, wherein the location-frequency representation comprises a color or grayscale image as a function of frequency and position of each axis, wherein a color or grayscale intensity of the color or gray scale image represents an amplitude of a frequency response;
- and
- analyzing the location-frequency representation using an image processing algorithm for extracting natural frequencies. attenuations, or hystereses.
A system for determining a dynamic response of a machine having multiple axes, the system comprising:
- the machine that comprises the multiple axes, the machine comprising a controller for moving the multiple axes;
- a data capture unit;
- at least one data source connected to the data capture unit, the data capture unit configured to capture output data in realtime provided by the at least one data source during a measurement run for each axis of the multiple axes over an entire work area of each axis, the output data comprising a current drawn by a drive of each axis or a speed of the drive;
- a data storage unit for storing the output data captured by the data capture unit;
- a data processing unit configured to determine a time-frequency representation of the output data, and convert the time-frequency representation into a location-frequency representation, wherein the location-frequency representation comprises a color or grayscale image as a function of frequency and position of each axis, wherein a color or grayscale intensity of the color or gray scale image represents an amplitude of a frequency response;
- and
- an image processing device for processing the location-frequency representation for extracting natural frequencies, attenuations, or hystereses.
Dependencies are inferred from the claim text.