CN108444590A - Vibration level fast adjustment method based on overlapping periodic sampling - Google Patents
Vibration level fast adjustment method based on overlapping periodic sampling Download PDFInfo
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- CN108444590A CN108444590A CN201810060712.0A CN201810060712A CN108444590A CN 108444590 A CN108444590 A CN 108444590A CN 201810060712 A CN201810060712 A CN 201810060712A CN 108444590 A CN108444590 A CN 108444590A
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- Prior art keywords
- vibration level
- vibration
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- overlapping
- time
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
Abstract
The invention discloses the vibration level fast adjustment methods based on overlapping periodic sampling, including setting target frequency and amplitude, give one initial input quantity of shake table；To the output waveform continuous sampling n times of shake table, sampling every time obtains corresponding sampled data, and front and back adjacent double sampling data head and the tail have overlapping；The vibration level in each sampled data is obtained respectively, whether within the allowable range to judge the deviations of all vibration levels, if so, thinking that vibration level is stablized；If there is the deviation of vibration level to exceed allowable range, continue real-time testing, step 23 is repeated, until vibration level is stablized.The present invention can specify whether vibration level is stable, judge that the accuracy that vibration level is stablized is high, while front and back double sampling data are overlapping, improve vibration level and stablize the efficiency judged.
Description
Technical field
The present invention relates to the methods of quick adjustment shake table vibration level.
Technical background
In numerous methods of vibration-measuring sensor Calibration of Dynamic, single-frequency steady-state advocate approach has calibration accuracy height, school
Quasi- wide frequency range, the advantages of facilitating realization to automatically control, various countries generally vibrate benchmark according to this method building national.Single-frequency
Steady stimulation method is usually to generate vibration source with electromagnetic vibration generator system, while detection is previously installed at the sensor on vibration table surface
Output voltage signal and laser interferometer output signal (absolute method) or standard transducer output signal (relative method),
And the relevant parameter of sensor is calculated by machine solution.It is referred to electromagnetic vibration generator system since electromagnetic vibration generator system generates vibration source
Drive the specified amplitude under assigned frequency, and in view of reasons such as shake table transient response and degree of regulation, cannot a step arrive
It is adjusted to position target vibration level, but should gradually control the amplitude of excitation acceleration, until vibration level is met the requirements.
Conventional vibration level method of adjustment is after user provides target frequency and amplitude, and system first provides a smaller input
Amount tests the practical vibration level of system, according to the actual transitive relation of input and output computing system, meter after shake table output is stablized
It calculates the input quantity size that next time is adjusted and enters to adjust next time by input quantity input system, after stabilization to be output and recycle, until
Until vibration level and target vibration level error are surveyed in setting range.In the above process, the setting vibration level in adjusting each time
For the certain proportion of target vibration level, and Approach by inchmeal target vibration level.
When being automatically adjusted with the vibration level method of adjustment, the calibration for high frequency vibration-measuring sensor, due to the vibration period
Shorter, adjustment time is also shorter, and this method can quickly adjust shake table and reach target vibration level；But for low frequency and ultralow
The calibration of frequency vibration-measuring sensor, the vibration period is longer, and the testing time is also corresponding long, along with adjustment process need by
Substep Approach by inchmeal target vibration level, regulating time will be multiplied, and the test of vibration level is in conventional vibration level method of adjustment
First waiting vibration level is stablized, and then test method complete cycle is used to be tested, and it is solid to wait for vibration level to stablize often waiting one
It fixes time, the stand-by period generally rule of thumb sets.But this method is not bound with shake table actual conditions, does not also account for difference
The stabilization time of Frequency point difference vibration level, there may be difference reduces testing efficiency if one longer stand-by period of setting, if
The waiting time of setting is insufficient, and vibration level is not up to stablized, and causes the vibration level size measured inaccurate, will influence subsequent vibration level
Adjustment.Even if waiting for an eternity, whether vibration level, which is stablized, accurately to learn.It is serious to reduce ultralow frequency vibration measuring sensing
The calibration efficiency of device consumes the extensive work time of experimenter and shaking table system.
Invention content
The purpose of the present invention is to provide it is a kind of can quickly and accurately adjust shake table vibration level and judge vibration level stablize
Method.
Vibration level fast adjustment method based on overlapping periodic sampling, includes the following steps：
Step 1：Target frequency and amplitude are set, one initial input quantity of shake table is given；
Step 2：To the output waveform continuous sampling n times of shake table, sampling every time obtains corresponding sampled data, front and back phase
Adjacent double sampling data head and the tail have overlapping；For example, the sample point data of the tail portion of first time sampled data is sampled with second
The sample point data on the head of data has overlapping；
Step 3：The vibration level in each sampled data is obtained respectively, judges the deviation of all vibration levels whether in allowable range
It is interior, if so, thinking that vibration level is stablized；If there is the deviation of vibration level to exceed allowable range, continue real-time testing, repeat step 2-3,
Until vibration level is stablized.
The Duplication of front and back adjacent double sampling data is higher, and it is lower to sentence steady confidence level, Duplication more low consumption when more
It is long.
Further, every time for estimating that the duration that the sampled data of vibration level occupies is a cycle.
Present invention waiting vibration level of not passive blindness before vibration level test is stablized, and judges that continuous vibration level several times is tested
Fluctuation whether in allowable fluctuation range, vibration level stabilization signal is if it is provided, if otherwise continuing real-time testing.
If the test of this n times vibration level uses serial stabilization judgment method, i.e. the data of n times vibration level test are different, and required is steady
Surely the time is judged for the sum of N sections of testing times, and the time is longer.In order to improve the real-time for stablizing judgement, before and after the present invention allows
It overlaps between test data twice, required in this way stablizing judges that the time is only 1 section of testing time to add twice
Interval.For example vibration level of test needs the sampled data of 10s every time, and 3 samplings are carried out using serial stabilization judgment method
The time for needing 30s, using having, when overlapping is stable to judge structure, each sampled data can be by 9s behind last time sampled data
Along with freshly harvested 1s data form after data, stabilization judges that the time can shorten to 12s in this way, you can greatly improves stabilization
The efficiency of judgement, so as to shorten the vibration level testing time.
The advantage of the invention is that：1, can specify whether vibration level is stable, judge that the accuracy that vibration level is stablized is high.2、
Front and back double sampling data are overlapping, improve vibration level and stablize the efficiency judged.
Description of the drawings
Fig. 1 is serial stabilization judgment method schematic diagram.
Fig. 2 is overlapping stabilization judgment method schematic diagram.
Specific implementation mode
Vibration level fast adjustment method based on overlapping periodic sampling, implementation steps are as follows：
Step 1：User sets target frequency and vibration level, and system gives shake table one smaller input quantity.
Step 2：To the output waveform continuous sampling n times of shake table, sampling every time obtains corresponding sampled data, front and back phase
Adjacent double sampling data head and the tail have overlapping；For example, the sampled point and displacement information of the tail portion of first time sampled data and second
The sampled point and displacement information on the head of secondary sampled data；
Step 3：The displacement amplitude in each sampled data is obtained respectively, and displacement amplitude shakes as what each sampling obtained
Whether within the allowable range grade judges the deviations of all vibration levels, if so, thinking that vibration level is stablized；If there is the deviation of vibration level to exceed
Allowable range then continues to implement test, step 2-3 is repeated, until vibration level is stablized.
The Duplication of front and back adjacent double sampling data is higher, and it is lower to sentence steady confidence level, Duplication more low consumption when more
It is long.
Each sampling time is a vibration period.
The waiting vibration level of the present invention not passive blindness when vibration level is tested is stablized, and judges that continuous vibration level several times is tested
Fluctuation whether in allowable fluctuation range, vibration level stabilization signal is if it is provided, if otherwise continuing real-time testing.
If the test of this n times vibration level uses serial stabilization judgment method, i.e. the data of n times vibration level test are different, and required is steady
Surely the time is judged for the sum of N sections of testing times, and the time is longer.In order to improve the real-time for stablizing judgement, before and after the present invention allows
It overlaps between test data twice, required in this way stablizing judges that the time is only 1 section of testing time to add twice
Interval.For example vibration level of test needs the sampled data of 10s every time, and 3 samplings are carried out using serial stabilization judgment method
The time for needing 30s, using having, when overlapping is stable to judge structure, each sampled data can be by 9s behind last time sampled data
Along with freshly harvested 1s data form after data, stabilization judges that the time can shorten to 12s in this way, you can greatly improves stabilization
The efficiency of judgement, so as to shorten the vibration level testing time.
The advantage of the invention is that：1, can specify whether vibration level is stable, judge that the accuracy that vibration level is stablized is high.2、
Front and back double sampling data are overlapping, improve vibration level and stablize the efficiency judged.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention is also and in art technology
Personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (2)
1. the vibration level fast adjustment method based on overlapping periodic sampling, includes the following steps：
Step 1：Target frequency and amplitude are set, one initial input quantity of shake table is given；
Step 2：To the output waveform continuous sampling n times of shake table, sampling every time obtains corresponding sampled data, front and back adjacent
Double sampling data head and the tail have overlapping；
Step 3：The vibration level in each sampled data is obtained respectively, whether within the allowable range to judge the deviations of all vibration levels, if
It is, then it is assumed that vibration level is stablized；If there is the deviation of vibration level to exceed allowable range, continue real-time testing, repeats step 2-3, until
Until vibration level is stablized.
2. the vibration level fast adjustment method according to claim 1, based on overlapping periodic sampling, it is characterised in that：Every time
For estimating that the duration that the sampled data of vibration level occupies is a cycle.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112783719A (en) * | 2020-12-31 | 2021-05-11 | 杭州趣链科技有限公司 | Monitoring data acquisition method, server, system and computer readable storage medium |
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| CN102230821A (en) * | 2011-04-11 | 2011-11-02 | 浙江大学 | Method for rapidly adjusting vibration level of ultralow-frequency vibration table |
| CN104035329A (en) * | 2014-07-02 | 2014-09-10 | 中国计量科学研究院 | Automatic vibration calibration system and calibration method |
| CN105353789A (en) * | 2015-11-16 | 2016-02-24 | 中国工程物理研究院总体工程研究所 | Continuous vibration signal time history replication control method |
| CN105510621A (en) * | 2015-09-28 | 2016-04-20 | 沈阳鼓风机集团安装检修配件有限公司 | Method and device for obtaining critical rotating speed of centrifugal compressor |
| CN105628189A (en) * | 2016-01-08 | 2016-06-01 | 中国航空工业集团公司上海航空测控技术研究所 | Helicopter body vibration signal adaptive processing method |
| US20170030953A1 (en) * | 2015-07-31 | 2017-02-02 | Metrix Instrument Co., Lp | System for dynamic monitoring of a machine |
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2018
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| EP0124136B1 (en) * | 1983-05-03 | 1989-03-15 | Alfons Dr.-Ing. Schmidt | Process and device for steering, controlling and regulating vibrating and quality control test stands |
| CN102230821A (en) * | 2011-04-11 | 2011-11-02 | 浙江大学 | Method for rapidly adjusting vibration level of ultralow-frequency vibration table |
| CN104035329A (en) * | 2014-07-02 | 2014-09-10 | 中国计量科学研究院 | Automatic vibration calibration system and calibration method |
| US20170030953A1 (en) * | 2015-07-31 | 2017-02-02 | Metrix Instrument Co., Lp | System for dynamic monitoring of a machine |
| CN105510621A (en) * | 2015-09-28 | 2016-04-20 | 沈阳鼓风机集团安装检修配件有限公司 | Method and device for obtaining critical rotating speed of centrifugal compressor |
| CN105353789A (en) * | 2015-11-16 | 2016-02-24 | 中国工程物理研究院总体工程研究所 | Continuous vibration signal time history replication control method |
| CN105628189A (en) * | 2016-01-08 | 2016-06-01 | 中国航空工业集团公司上海航空测控技术研究所 | Helicopter body vibration signal adaptive processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112783719A (en) * | 2020-12-31 | 2021-05-11 | 杭州趣链科技有限公司 | Monitoring data acquisition method, server, system and computer readable storage medium |
| CN112783719B (en) * | 2020-12-31 | 2023-02-28 | 杭州趣链科技有限公司 | Monitoring data acquisition method, server, system and computer readable storage medium |
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Application publication date: 20180824 |
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