CN103868681B - Flexible coupling stiffness test method in high precision - Google Patents
Flexible coupling stiffness test method in high precision Download PDFInfo
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- CN103868681B CN103868681B CN201210527839.1A CN201210527839A CN103868681B CN 103868681 B CN103868681 B CN 103868681B CN 201210527839 A CN201210527839 A CN 201210527839A CN 103868681 B CN103868681 B CN 103868681B
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Abstract
The present invention relates to high accuracy flexible coupling stiffness test method, including frock clamp difficult to tackle, also include optical measurement instrument, signal processing unit and output unit；Optical measurement instrument includes laser instrument high voltage power supply, laser instrument, photosensitive tube, the laser beam that laser instrument is launched is just to photosensitive tube, flexible coupling one end is fixed on frock clamp difficult to tackle, and its other end down and is fixed with fork difficult to tackle, and fork difficult to tackle is positioned in the light path of laser instrument；Signal processing unit includes the signal amplification circuit for receiving photosensitive tube output signal and signal transformation circuit, for the timer conter that photosensitive tube output signal is counted, the processing unit that processes for timer conter output signal, the output data of processing unit send into output unit output.Test period length when the present invention solves existing manual counterweight method test flexible coupling rigidity, concordance is poor, easily bring the technical problem of human error, the highest.
Description
Technical field
The present invention relates to the special test method of a kind of flexible gyroscope critical component-flexible coupling.
Background technology
The angular displacement stiffness K of the flexible coupling of flexible gyroscope is a very important technical specification, and method of testing is
Go through the development in two generations.The first generation is to use counterweight method, as the term suggests, add counterweight and make generation deformation difficult to tackle (with human eye by ruler
Observe deformation quantity), utilize Hooke's law to measure rigidity value；The second filial generation is that counting method (utilizes universal counter repetitive measurement to obtain
To hunting period, apply a formula with computer and calculate rigidity value), from certainty of measurement, the second filial generation has had matter than the first generation
Leap；Utilizing universal counter to measure count value by repeatedly swinging, write by hand applies a formula after taking out meansigma methods and uses tricks to calculate device calculation
Go out result.The method needs repeatedly to swing, and causes test period length, concordance poor, and artificially copy, report, count according to etc. process
The error that may bring.
Summary of the invention
It is an object of the present invention to provide a kind of high accuracy flexible coupling stiffness test method, which solve existing manual counterweight method
Test period length during test flexible coupling rigidity, concordance is poor, easily bring the technical problem of human error.
The technical solution of the present invention is:
A kind of high accuracy flexible coupling stiffness test method, it is characterized in that and comprises the following steps:
1] one end difficult to tackle is fixed, and the other end down and is provided with fork difficult to tackle,
2] fork micro-swinging difficult to tackle, laser signal is scratched one's head, and fork is round to be blocked, and it is the most raw that photosensitive tube receives laser signal
Become corresponding voltage signal；
3] cycle of last 5 voltage signals before fork difficult to tackle stops swinging is taken as measuring T1 hunting period；
4] by these 5 meansigma methodss measuring T1 hunting period as calculating T hunting period,
5] according to following formula calculating stiffness coefficient K:
K=4 π2A/T2-B
In formula: the rotary inertia constant of A-oscillation system；
The constant that B-and frock fork quality, length are relevant；
Calculating T hunting period of T-flexible coupling.
Take the specifically comprising the following steps that of cycle of last 5 voltage signals before fork difficult to tackle stops swinging
3.1] in data storage, open up the memory space of 5 unit；
3.2] measure and obtain 12 groups of phase mutual deviations sampled data within 10%, remove the maximum in 12 groups of numbers and
Remaining 10 groups of sampled datas are averaged, are put in first module by little value；
3.3] continue sampling, the meansigma methods of the new number collected with first module is compared, if deviation is at 10% model
Within enclosing, the data newly collected are stored in second unit, if beyond 10%, then giving up not；
3.4] continue sampling, the meansigma methods of the new number collected with the first two unit is compared, if deviation is 10%
Within scope, the data newly collected are stored in Unit the 3rd, if beyond 10%, then giving up not；
3.5] the like, until 5 unit have all stored data；
3.6] the new number that the next one collects compares with the meansigma methods of above five unit, if being rejected beyond 10%, if
Within 10%, then by the data cover first module of second unit, the data cover second unit of Unit the 3rd, Unit the 4th
Data cover the 3rd unit, data cover the 4th unit of Unit the 5th, by newly number be stored in and cover Unit the 5th；
3.7] the like, until the most not obtaining new valid data within the time limited, then take in 5 unit
Data stop swinging as fork difficult to tackle before cycle of last 5 voltage signals.
A kind of high accuracy flexible coupling rigidity testing instrument, including frock clamp difficult to tackle,
It is characterized in that
Also include optical measurement instrument, signal processing unit and output unit；
Described optical measurement instrument includes laser instrument high voltage power supply, laser instrument, photosensitive tube, the laser beam that described laser instrument is launched
Just to photosensitive tube, described flexible coupling one end is fixed on frock clamp difficult to tackle, and its other end down and is fixed with fork difficult to tackle,
Described fork difficult to tackle is positioned in the light path of laser instrument；
Described signal processing unit includes the signal amplification circuit for receiving photosensitive tube output signal and signal shaping electricity
Road, for the timer conter that photosensitive tube output signal counted, process for timer conter output signal
Processing unit, the output data of described processing unit send into output unit output.
Described output unit includes display unit and print unit.
Advantages of the present invention:
1, accurate: achieved the frequency measurement of zero degree pivot angle, special test experiments knot with micro-arrangement by Intelligent Single-Chip Based
Fruit shows: concordance is far superior to aging method repetitive measurement result.
2, rapidly and efficiently: the most micro-pendulum is with regard to result, compared with the test process that the past is loaded down with trivial details, the testing time greatly contracts
Short, the efficiency testing, debugging flexible coupling significantly improves, and testing efficiency improves more than 10 times.
3, reliable: eliminate artificially copy, report, count according to etc. the error that may bring of process.
4, due to the fact that and utilize Intelligent Single-Chip Based to achieve " zero degree measurement ", therefore test concordance is good, measure and be once
Go out result, and owing to have employed single-chip microcomputer floating-point operation, eliminate send a duplicate to, the artificial link such as calculating, single-chip microcomputer can directly show
Show and print stiffness K value difficult to tackle.
Accompanying drawing explanation
Fig. 1 is test philosophy schematic diagram of the present invention；
Fig. 2 is the principle schematic of glide filter in method of testing of the present invention.
Detailed description of the invention
Operation principle of the present invention:
Flexible coupling rigidity testing instrument utilizes Intelligent Single-Chip Based to carry out data acquisition in high precision, have employed the test of micro-arrangement,
Changing over utilizes universal counter to measure count value by repeatedly swing, and write by hand applies a formula after taking out meansigma methods and uses tricks to calculate device
Calculate the way of result, and become once swing and utilize Intelligent Single-Chip Based survey calculation, directly display or print measurement knot.
Flexible coupling is when making small sway, and T and stiffness coefficient K hunting period of flexible coupling exists following mathematics and closes
System:
K=4 π2A/T2-B
In formula: A represents the rotary inertia constant of oscillation system；B is the constant relevant with frock pendulum quality, length, surveys
T hunting period of amount flexible coupling just can calculate the stiffness coefficient K of flexible coupling by formula.Flexible coupling is firm in high precision
Degree tester is exactly to utilize Laser emission photosensitive reception sensor measurement flexible coupling by the vibration period of natural frequency vibration
T, and the stiffness K of flexible coupling is obtained through computing.
Test philosophy schematic diagram such as Fig. 1.
1, effective measurement data is gathered:
Being found through experiments, the most theoretic constant of flexible coupling T value hunting period, in swing process, T value is at pendulum
The dynamic initial stage different with the difference of pivot angle size and with swing the T value in latter stage unequal, have small change, along with pivot angle
The T value that diminishes the most gradually becomes little；Regardless of whether initial stage pivot angle is much swings cycle base when pendulum angle in latter stage tends to 0 degree in flexible coupling
This is consistent.Thus introduce the micro-arrangement of single-chip microcomputer measure i.e. measure T value result when flexible coupling pendulum angle tends to 0 degree (
Before stopping, last sampling virtual value is considered as accurate data).Universal counter in the past is utilized to realize, profit
With Intelligent Single-Chip Based (i.e. judge) with utilize software glide filter data processing technique, flexible coupling rigidity testing instrument reality in high precision
Show " zero degree measurement ".
Though 2, T value gradually tends to actual value in swing process, but owing to the impact of environmental factors (refers to extraneous Factory Building lathe
The vibration equipment sources such as air-conditioning) in sampled data can superposition environment interference component, every time the random value of sampling but may bigger than normal or
Less than normal.For ensureing the concordance of measurement result, we will swing the flat of last 5 the sampling virtual values before stopping with survey calculation
Average is identified as accurate result, has reached the result making us being satisfied with very much.
3, glide filter implementation method:
First pass through measurement and obtain 12 groups of phase mutual deviations sampled data within 10%, remove maximum in 12 groups of numbers and
Then remaining 10 groups of sampled datas, are averaged by minima.The memory space of 5 unit is opened up in data storage,
The meansigma methods remaining 10 groups of sampled datas is first put into first module.Then, sampling is continued, by single with first for the new number collected
The meansigma methods of unit compares, if deviation is within 10% scope, the data newly collected is stored in second unit.It follows that
Continue sampling, the meansigma methods of the new number collected with above two unit is compared, if deviation is within 10% scope, will
The data of new sampling are stored in Unit the 3rd.Continue to gather new number, the meansigma methods of the new number collected with above three unit is entered
Row compares, if deviation is within 10% scope, the data newly sampled is stored in Unit the 4th.Same method, gathers and stores the 5th single
The data of unit.If adopt several deviations within the 10% of preceding units meansigma methods every time, then it is considered as that valid data are stored in
Corresponding units, if beyond the 10% of preceding units meansigma methods, is then considered as to disturb the error result caused will be rejected not.
After five unit have number, the new number that the next one collects compares with the meansigma methods of above five unit, and thinking within 10% has
Effect, is rejected beyond 10%.The access of significant figure with the most slightly different, the data cover first module of second unit, the 3rd
The data cover second unit of unit, data cover the 3rd unit of Unit the 4th, data cover the 4th unit of Unit the 5th,
New significant figure being stored in and covered Unit the 5th, storage valid data all can give up to fall the number of old first module the most every time
According to, keeping five cell datas is the up-to-date valid data measured forever, and this process repeats always, until when the N limited is long
In the most do not obtain valid data, it is believed that swing stopped.Calculate the average of five unit after stopping swinging
Value is also included it in computing formula as this correct result measured and is obtained the stiffness coefficient of flexible coupling.Glide filter is illustrated
Figure is such as Fig. 2.
Claims (1)
1. a high accuracy flexible coupling stiffness test method, it is characterised in that: comprise the following steps:
1] one end difficult to tackle is fixed, and the other end down and is provided with fork difficult to tackle,
2] fork micro-swinging difficult to tackle, laser signal is scratched one's head, and fork is round to be blocked, and photosensitive tube receives laser signal and also generates phase
The voltage signal answered；
3] cycle of last 5 voltage signals before fork difficult to tackle stops swinging is taken as measuring T1 hunting period, particularly as follows:
3.1] in data storage, open up the memory space of 5 unit；
3.2] measurement obtains 12 groups of phase mutual deviations sampled data within 10%, removes the maximum in 12 groups of numbers and minimum
Remaining 10 groups of sampled datas are averaged, are put in first module by value；
3.3] continue sampling, the meansigma methodss of the new number collected with first module compared, if deviation 10% scope with
In, the data newly collected are stored in second unit, if beyond 10%, then giving up not；
3.4] continue sampling, the meansigma methods of the new number collected with the first two unit is compared, if deviation is in 10% scope
Within, the data newly collected are stored in Unit the 3rd, if beyond 10%, then giving up not；
3.5] the like, until 5 unit have all stored data；
3.6] the new number that the next one collects compares with the meansigma methods of above five unit, if being rejected beyond 10%, if
Within 10%, then by the data cover first module of second unit, the data cover second unit of Unit the 3rd, Unit the 4th
Data cover the 3rd unit, data cover the 4th unit of Unit the 5th, newly number is stored in and covers Unit the 5th；
3.7] the like, until the most not obtaining new valid data within the time limited, then take the data in 5 unit
The cycle of last 5 voltage signals before stopping swinging as fork difficult to tackle；4] by these 5 meansigma methodss measuring T1 hunting period
As calculating T hunting period,
5] according to following formula calculating stiffness coefficient K:
K=4 π2A/T2-B
In formula: the rotary inertia constant of A-oscillation system；
The constant that B-and frock fork quality, length are relevant；
Calculating T hunting period of T-flexible coupling.
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| CN110553829A (en) * | 2019-09-23 | 2019-12-10 | 中国船舶重工集团公司第七0七研究所 | integral flexible joint rigidity measuring device and method |
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| RO65460A2 (en) * | 1973-03-19 | 1980-01-15 | Institutul De Cercetari Pielarie,Cauciuc Si Mase Plastice,Ro | METHOD AND APPARATUS FOR DETERMINING THE FLEXIBLE MATERIAL RIGIDITY DEGREES |
| CN2679766Y (en) * | 2004-03-04 | 2005-02-16 | 青岛大学 | Photoelectric counter having laser light source |
| CN101101248A (en) * | 2007-07-20 | 2008-01-09 | 上海应用技术学院 | Adjustable clamping device of minisize torsional rod rigidity test |
| CN101592678A (en) * | 2009-07-03 | 2009-12-02 | 北京航天控制仪器研究所 | A kind of flexible pendulous accelerometer |
| CN203132821U (en) * | 2012-12-10 | 2013-08-14 | 西安航天精密机电研究所 | Highly-precise rigidity tester for flexible joint |
-
2012
- 2012-12-10 CN CN201210527839.1A patent/CN103868681B/en active Active
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|---|---|---|---|---|
| RO65460A2 (en) * | 1973-03-19 | 1980-01-15 | Institutul De Cercetari Pielarie,Cauciuc Si Mase Plastice,Ro | METHOD AND APPARATUS FOR DETERMINING THE FLEXIBLE MATERIAL RIGIDITY DEGREES |
| CN2679766Y (en) * | 2004-03-04 | 2005-02-16 | 青岛大学 | Photoelectric counter having laser light source |
| CN101101248A (en) * | 2007-07-20 | 2008-01-09 | 上海应用技术学院 | Adjustable clamping device of minisize torsional rod rigidity test |
| CN101592678A (en) * | 2009-07-03 | 2009-12-02 | 北京航天控制仪器研究所 | A kind of flexible pendulous accelerometer |
| CN203132821U (en) * | 2012-12-10 | 2013-08-14 | 西安航天精密机电研究所 | Highly-precise rigidity tester for flexible joint |
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| 单摆周期的精确自动检测;谢静等;《价值工程》;20111231;第30卷(第4期);参见第39页，图1 * |
| 基于附加质量法的挠性接头刚度动态测量方法分析;王广林等;《现代制造工程》;20101231(第5期);第92-95页第2节，第3.2-3.3节，第4节，图1-9 * |
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