Frequency characteristic measurement device, controller and frequency characteristic measurement method

A technology of frequency characteristics and measuring devices, which is applied in the direction of frequency measuring devices, measuring devices, program control, etc., can solve the problems of longer measuring time, achieve high measuring accuracy and shorten the measuring time

Pending Publication Date: 2020-10-09
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the measurement method described in Patent Document 2, the measurement needs to be performed while gradually increasing the frequency in the measurement frequency band, as in the prior art, so there is still a problem that the measurement time becomes longer.

Method used

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  • Frequency characteristic measurement device, controller and frequency characteristic measurement method
  • Frequency characteristic measurement device, controller and frequency characteristic measurement method
  • Frequency characteristic measurement device, controller and frequency characteristic measurement method

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Deformed example 1

[0126] In the above-mentioned embodiment, the case of measuring the frequency characteristic (frequency response) of the control signal (speed command) is exemplified and explained by taking the motor with the load connected to the control device as an example. However, the frequency characteristic measuring unit does not have the frequency measurement target. Limited to this.

[0127] For example, such as Image 6 As shown, the frequency response when the sine wave interference generated by the frequency generating unit 210 is input to the speed command value generated by the speed command generating unit can also be measured. Thereby, for example, the speed control gain can be adjusted.

Deformed example 2

[0129] In the above-mentioned embodiment, the case of measuring the frequency characteristic (frequency response) of the speed command is exemplified and explained by taking the electric motor connected to the load as one control object, but the frequency measurement object of the frequency characteristic measuring unit is not limited to Speed ​​command. It is also possible to measure the frequency characteristic (frequency response) of the input signal by using an arbitrary control object as the object to be measured.

[0130] It is also possible to measure the frequency characteristic (frequency response) of the input signal by using an input signal other than the speed command (for example, a torque command) as the object to be measured.

Deformed example 3

[0132] In the above-described embodiment, the control device 10 is configured to include the frequency characteristic measurement unit 200, but it is not limited to this.

[0133] For example, it may be provided as a frequency characteristic measuring device in which the frequency characteristic measuring unit 200 is independent, or may be provided as a single device. In addition, the frequency characteristic measurement unit 200 may be provided in the servo control unit 100. In addition, one of the frequency generation unit 210 and the frequency characteristic calculation unit 250 constituting the frequency characteristic measurement unit 200 may be provided in the control device 10 or the servo control unit 100. In addition, it may be provided as an independent device or as a single device.

[0134] In other words, the control device of the present disclosure can adopt various embodiments having the following structures.

[0135] (1) One mode of the frequency characteristic measu...

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Abstract

The invention provides a frequency characteristic measurement device, a controller and a frequency characteristic measurement method. The frequency characteristic measurement device that measures thefrequency characteristic of a measurement target includes: a multi-sine signal generation unit that generates a multi-sine signal; a sweep sinusoidal wave generation unit that generates a plurality ofsweep sinusoidal waves; an input signal switching unit that selects any one of the multi-sine signal and the sweep sinusoidal waves so as to input the selected one to the measurement target; a data acquisition unit that acquires, at a predetermined sampling frequency, sampling data of an input signal which is input to the measurement target and sampling data of an output signal which is output from the measurement target; and a characteristic calculation unit that calculates a frequency characteristic including the gain and the phase of the input and output signals in the measurement target from the sampling data of the input and output acquired.

Description

Technical field [0001] The present invention relates to a frequency characteristic measuring device, a control device, and a frequency characteristic measuring method. Background technique [0002] Conventionally, there has been known a numerical control device that controls a machine tool for processing workpieces by numerical values. For example, the machine tool performs turning, planing, drilling, milling, grinding, etc. on a workpiece, and most of them have a built-in motor. [0003] In a machine tool using an electric motor, the frequency characteristics (frequency response) of the electric motor to which a load is connected are measured for the purpose of analyzing the mechanical vibration that causes the deterioration of the operating characteristics and analyzing the responsiveness and stability of the control. When measuring the frequency characteristics of a motor, for example, while gradually increasing the frequency, a sine wave speed command is input to a numerical c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02G01R27/30
CPCG01R23/02G01R27/30G05B2219/37534G05B2219/37612G01R27/32G06F1/022G05B19/371G06F2101/04G05B19/408G05B2219/37352G05B2219/37181
Inventor 罗威中村勉
Owner FANUC LTD
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