JPH08285678A - Abnormal vibrational wave-form producing device - Google Patents

Abstract

PURPOSE: To provide an abnormal vibrational wave-form producing device by which an abnormal vibrational wave-form can be automatically produced in a short time. CONSTITUTION: An abnormal vibrational wave-form producing device is provided with a schedule input device 1 by which the number of revolutions and the revolution synchronization component that have been previously determined in correspondence to a prescribed discrete time, and the amplitude and phase of the prescribed order ratio component, and also the amplitude of the natural frequency component are output for each time, a vibrational wave-form producing means 2 by which the output of the schedule input device is received and the digital vibrational wave-form is output, and a D/A converter 3 for receiving the output of the vibrational wave-form producing means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormal vibration data generator applied when generating abnormal vibration data in a verification test of a rotating machine vibration diagnostic device or the like.

[0002]

2. Description of the Related Art Conventionally, when generating vibration data, a vibration waveform satisfying the vibration vector and vibration spectrum of the vibration waveform to be generated is manually calculated in advance. In order to generate the vibration waveform, a worker manually outputs a sine wave from a transmitter and synthesizes a plurality of sine waves to generate the vibration waveform.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned prior art, a vibration waveform is manually calculated from a vibration vector and a vibration spectrum, an operator manually operates a transmitter, or a sine wave from a plurality of transmitters is combined. It takes too much time to do so. In addition, the error was large, and complicated vibration waveforms could not be generated.

An object of the present invention is to solve the above problems.

[0005]

The present invention employs the following means to solve the above-mentioned problems.

That is, as an abnormal vibration waveform generator,
A schedule input device that outputs the predetermined number of revolutions corresponding to a predetermined discrete time, the amplitude and phase of the rotation synchronization component and its predetermined order ratio component, and the amplitude of the natural vibration component at each of the above times, and the same schedule. A vibration waveform generation means for receiving the output of the input device and outputting a digital vibration waveform, and a D / A conversion device for receiving the output of the vibration waveform generation means are provided.

[0007]

In the above invention, the predetermined number of revolutions corresponding to a predetermined discrete time, the amplitude and phase of the rotation synchronization component and its predetermined order ratio component, and the amplitude of the natural vibration component are input to the schedule input device in advance. To be done. The schedule input device interpolates and outputs these input data at a predetermined ratio for each calculation time. The vibration waveform generation means inputs these data and outputs a digital vibration waveform. D
The / A converter converts this digital vibration waveform into analog and outputs it. As described above, a complicated vibration waveform can be automatically and easily generated automatically.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, the output of the schedule input device 1 is sequentially sent to the vibration waveform generating means 2 and the D / A conversion device 3. A progress status display device 4 is connected to the vibration waveform generation means 2.

A detailed configuration of the vibration waveform generating means 2 is shown in FIG.
Shown in

A verification test of the rotary machine vibration diagnosis system will be described below as an example.

In order to verify a certain function of the rotary machine vibration diagnosis system, it is necessary to generate and input a vibration waveform having a vibration vector and a vibration spectrum with which the function operates. The vibration vector of the vibration waveform you want to generate there,
The vibration spectrum is previously input to the schedule input device 1.

Specifically, for example, as shown in FIG.
Revolutions at time 0, 20, 60, ... 60, 600, 1
800, ... 1N (rotational synchronization) component as the rotational synchronization order ratio component, channel 1 amplitude, phase 0, 0, 5, 3
0, 20, 150, ... 2N (secondary component of rotation synchronization) component,
Channel 1 amplitude, phase 0, 0, 3, 50, 10, 1
40, ... Natural vibration component (1), channel 1 amplitudes 0, 10, 5, ...

According to these inputs, the schedule input device 1 outputs the following calculations according to the calculation time. (1) Rotational speed is 60 → 600 during time 0 to 20 (seconds)
(Rpm) Channel 1 1N component amplitude 0 → 5 (μm) Phase 0 → 30 (degrees) 2N component amplitude 0 → 3 (μm) Phase 0 → 50 (degrees) Natural frequency component amplitude Changes from 0 to 10 (μm) at a constant rate. (2) The rotation speed is 600 → 1 during the time 20 to 60 (seconds)
800 (rpm) 1N component amplitude of channel 1 is 5 → 20 (μm) Phase is 30 → 150 (°) Phase of 2N component is 3 → 10 (μm) Phase is 50 → 140 (°) Natural frequency component of The amplitude changes from 10 to 5 (μm) at a constant rate. (3) The same changes thereafter.

These are sent to the vibration waveform generating means 2, and the digital vibration waveform is arithmetically generated based on these. This digital vibration waveform is converted into an analog vibration waveform by the A / D converter 3 and output. FIG. 4 shows the vibration vector and vibration spectrum of the generated vibration waveform.

The progress display device 4 displays time on the horizontal axis,
The schedule of amplitude, phase, rotation speed, etc. of output vibration data is shown in a graph, and a line is inserted at the point where the current output is made so that the current output value can be understood and displayed.

When the time-series vibration waveform is generated as described above, since it is possible to input in the state of the vibration vector and the vibration spectrum, it is not necessary to perform manual calculation in advance, and the time is shortened.

Further, since a complicated vibration vector and vibration spectrum can be input, it is not necessary to combine the sine waves output from a plurality of oscillators, the accuracy is improved, and any vibration waveform can be generated.

With respect to the generation of the vibration waveform, the operator does not manually adjust the sine wave output from the oscillator, but only schedules a series of changes in advance, and thereafter the vibration waveform is fully automatically generated. Time can be shortened and accuracy can be improved.

[0020]

As described above, according to the present invention, by inputting the schedule of the rotation speed, the rotation synchronization component and the amplitude and phase of the predetermined order component thereof, a vibration waveform satisfying them can be automatically generated. The time can be shortened and the accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention.

FIG. 2 is a configuration block diagram of a vibration waveform generating means of the embodiment.

FIG. 3 is an explanatory view of the operation of the embodiment.

FIG. 4 is an explanatory view of the operation of the embodiment.

[Explanation of symbols]

 1 Schedule Input Device 2 Vibration Waveform Generation Unit 3 D / A Conversion Device 4 Progress Status Display Device

Claims (1)

[Claims] 1. A schedule input for outputting a predetermined number of revolutions corresponding to a predetermined discrete time, an amplitude and a phase of a rotation synchronization component and a predetermined order ratio component thereof, and an amplitude of a natural vibration component at each time. An abnormal vibration waveform, comprising: a device, a vibration waveform generation unit that receives an output of the schedule input device and outputs a digital vibration waveform, and a D / A conversion device that receives an output of the vibration waveform generation unit. Generator.