SU1352276A1 - Arrangement for vibration tests of articles - Google Patents

Abstract

This invention relates to a testing technique. The aim of the invention is to increase the accuracy in determining the maximum allowable load characteristics of products. The electrical signal from the output of the control generator 1 after the power amplifier 2 is converted by the vibrator 3 into mechanical oscillations, the amplitude of which is adjusted to maintain the response of the product 4 at the maximum permissible level due to the AGC circuits and program control formed by the vibration converter 5 mounted on the test product 4 , amplifier 10 and accompanying filter 7, tuned by the signal of the control generator 1 together with the accompanying filter 8 in order to select the fundamental harmonic of the vibration sweep, frequency range. Vibrator 6 mounted on the vibrator 3 generates a signal proportional to the applied mechanical effect, which after amplifier 9 and the accompanying filter 8 is recorded by means of a recorder 11. 1 Il. (C from sd go ISD -vi 05

Description

one

The invention relates to testing equipment, namely, devices for vibration testing, and can be used mainly in determining the maximum allowable load characteristics of products.

The purpose of the invention is to improve the accuracy in determining the maximum permissible load characteristic of the product - due to the fact that in the frequency range of tests with continuous change of frequency, vibrations are stabilized at the maximum permissible level, the response of the product, and the level of influence is recorded as its maximum permissible load characteristic.

The drawing shows a structural diagram of the proposed device for vibration testing of products.

A device for vibration testing of products includes a control generator 1 for automatic adjustment

the control circuit formed by the vibrator 5 mounted on the tested product 4 by the amplifier 10

g and the accompanying filter 7 tuned by the signal of the control generator 1 together with the accompanying filter 8 in order to select the fundamental harmonic of the vibration during the sweep

10 frequency range. Mounted on a vibrator. 3, the vibration transducer 6 generates a signal proportional to the applied mechanical action, which after amplifier 9 and co-carrying filter 8 is recorded by a recorder 11. The response signal of product 4 is stabilized at the maximum permissible level by changing the level of mechanical vibrations of the vibrator 3. If the rate of increase of the response level turns out to be more the compression rate of the output of the control generator 1, which is generally

If the case is limited, then there will be preamplifier (AGC), power amplifier 2, response vibrator 3 response response, product 4 under test, vibration transducers 5 and 6, accompanying filters 7 and 8, amplifier 9 and 10, recorder 11 and differentiator 12, Control generator 1 is connected to the control inputs of the accompanying filters 7 and 8, to the sweep input of the recorder 11 and connected to the output through the power amplifier 2 to

35

maximum permissible level To prevent this, the differentiator 12 provides a change in the compression rate due to the fact that the signal 30 produced by the differentiator 12, proportional to the rate of increase of the response level of the test product 4, is fed to the input of the control speed control gain of the control generator 1.

the vibrator 3. The test product 4 with the vibration transducer 5 installed on it and the vibration transducer 6 are located on the vibrator 3. The vibration transducer 6 is connected through the amplifier 9 and the accompanying filter 8 40 products containing in series to the information input of the recorder 11. The connected control generator with the vibration transducer 5 is connected through the amplifier 10 and the accompanying filter 7 to the coefficient control input of the invention

A device for vibration tests with adjustable frequency amplitude output frequency converter and automatic gain control unit

The control generator 1 and the input and 5 power inputs control the coefficient of the differentiator 12, the output of which is amplified and the control speed is connected to the input of the control gain speed, power amplifier and vibration control gain of the control generator 1,

The device works as follows.

The electrical signal from the output of the control generator 1 after the amplifier 2 power is converted by the vibrator 3 into mechanical oscillations, the am-55 is connected to the output of the accompanying

filter, and the output is with the control input of the control speed of the control oscillator, and successively connected to the second vibrator

which is adjusted to maintain the response of the product 4 at the maximum allowable level, due to the AGC circuit, the control generator 1 and

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the control circuit formed by the vibrator 5 mounted on the tested product 4 by the amplifier 10

g and the accompanying filter 7 tuned by the signal of the control generator 1 together with the accompanying filter 8 in order to select the fundamental harmonic of the vibration during the sweep

10 frequency range. Mounted on a vibrator. 3, the vibration transducer 6 generates a signal proportional to the applied mechanical action, which after amplifier 9 and co-carrying filter 8 is recorded by a recorder 11. The response signal of product 4 is stabilized at the maximum permissible level by changing the level of mechanical vibrations of the vibrator 3. If the rate of increase of the response level turns out to be more the compression rate of the output of the control generator 1, which is generally

increase response of the test product

maximum permissible level To prevent this, the differentiator 12 provides a change in the speed of compression due to the fact that the signal produced by the differentiator 12, proportional to the rate of increase of the response level of the test product 4, is fed to the input of the control speed control gain of the control generator 1.

Delia containing serially connected control generator with

Delia containing serially connected control generator with

Claims (1)

Invention Formula s, containing successively driven control generator with A device for vibration testing of products, containing a series-connected control generator with an adjustable amplitude output frequency converter and an automatic gain control unit, have a transducer connected in series to a vibration transducer, an amplifier installed on the product under test, and an accompanying filter whose output is connected to a factor control input, a control generator gain, a differentiator whose input connected to the attendant’s exit filter, and the output - with the input of the control speed control gain of the control generator, and the second vibratory transducer in series 1352276 vibrator distinguishing setter so that RATOR, the second amplifier, the second one with the purpose of increasing the accuracy with the support filter and the recorder, determining the maximum permissible load of the converter of the output frequency characteristic, information The control generator is connected to the self-recorder's outlet connected to the output of the recorder sweep and to the control of the second accompanying filtering input of the accompanying filters, pa.