CN106908313A - The small load control system of big load testing machine and control method - Google Patents
The small load control system of big load testing machine and control method Download PDFInfo
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- CN106908313A CN106908313A CN201710243071.8A CN201710243071A CN106908313A CN 106908313 A CN106908313 A CN 106908313A CN 201710243071 A CN201710243071 A CN 201710243071A CN 106908313 A CN106908313 A CN 106908313A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Abstract
The invention discloses a kind of small load control system of big load testing machine and control method, the system includes small load charger and small load control system；The small load charger includes making the spring-feel mechanism that moving cell upper grip is connected with big load testing machine, the test specimen being connected with spring-feel mechanism, and the small-load sensor being connected with test specimen, small-load sensor makees on moving cell lower chuck installed in big load testing machine；The small load control system includes the host computer and simulation imput device and simulation output equipment of controller and controller connection；By the small load charger in a set of outside and control system, using the small load precise control of the Bit andits control functional realiey of big load testing machine；The present invention is used to improve the small load control accuracy of big load testing machine, expands range of application and versatility, reduces equipment investment.
Description
Technical field
The present invention relates to a kind of small load control technology of testing machine, and in particular to a kind of small load of big load testing machine
Control system and control method.
Background technology
Hydraulic servo testing machine is generally used for big load experimental test, it is impossible to meet small sample and low modulus (such as rubber, life
Thing material) small load (＜ 1%FS) accurate measurement and demand for control in experimental test.
The content of the invention
It is micro- it is an object of the invention to provide a kind of big load testing machine for the problem for overcoming above-mentioned prior art to exist
Side crops industry control system and control method, the precise displacement control function based on testing machine, by testing machine and outside small load
Lotus control system Collaborative Control realizes the small load closed-loop control of big load testing machine.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
A kind of small load control system of big load testing machine, including small load charger and small load control system
System；The small load charger includes making the spring-feel mechanism that moving cell upper grip is connected with big load testing machine, with
The test specimen of spring-feel mechanism connection, and the small-load sensor being connected with test specimen, small-load sensor are arranged on big load
Testing machine is made on moving cell lower chuck；The small load control system include host computer that controller and controller connect with
And simulation imput device and simulation output equipment；Small load charger is defeated by big load testing machine by spring-feel mechanism
The displacement for going out is converted to small load and is applied to test specimen, and test specimen is forced through small-load sensor measurement；Big load testing machine leads to
Cross the controller connection of external interface and small load control system；The host computer of small load control system will control setting ginseng
Number is that loading mode, loading force, loading velocity are sent to controller, the first simulation input that controller passes through simulation imput device
The displacement signal of port processing big load testing machine controller output, is adopted by the second simulation input port of simulation imput device
Collect the small load signal of test specimen of small-load sensor measurement in small load charger, displacement and load signal are used as feedback
Amount feeding controller, controlled quentity controlled variable is small load, command displacement is calculated using closed loop control algorithm, through simulation output equipment
Simulation output port exports and sends into big load testing machine controller carries out Bit andits control；By big load testing machine and small load
Lotus control system Collaborative Control realizes the small load closed-loop control of big load testing machine.
The concrete structure of the small load charger is：It is connected including making moving cell upper grip with big load testing machine
Upper fixture 1, guide post 2 is connected with upper fixture 1 using piston guide mode, and loading spring 3 is arranged on guide post 2, is oriented to
The lower end of bar 2 is connected through a screw thread with upper platen 5, and guide post 2 is used to ensure that loading spring 3 is axially deformed, and prevents spring unstability
And bias；Limit switch 4 is arranged on the upper surface of upper platen 5, and position limitation protection is compressed for loading spring 3；Also include and big load
The lower clamp 9 of testing machine lower chuck connection, small-load sensor 8 is arranged on lower clamp 9, and pressing disc 7 is passed installed in side crops industry
On sensor 8, test specimen 6 is placed between platen 5 and pressing disc 7；Big load testing machine start is displaced through upper fixture 1 and passes to and adds
Spring 3 is carried, the compressive deformation of loading spring 3 produces compressive load to pass to test specimen 6, pressing disc 7 and side crops industry by upper platen 5 and passes
Sensor 8, each part uses cascaded structure, the load equivalence that big load testing machine compression-loaded spring 3 is produced pass to test specimen 6 and
Small-load sensor 8.
The control method of the described small load control system of big load testing machine, the core of small load control system is
Peripheral control unit, input quantity for program setting target load, feedback quantity be big load testing machine output current displacement and
The current load of small-load sensor measurement, controller calculates Bit andits control amount and is input into big load examination by closed loop control algorithm
Machine is tested, produces load deflection push the spring load maintainer to realize small loading force closed-loop control output function.
Loading force control accuracy Δ F depends on the stiffness K of big load testing machine output displacement precision Δ L and loading spring 3,
I.e.：
Δ F=Δs L × K
In the case where big load displacement of testing machine control accuracy is enough, can be obtained by adjusting the stiffness K of loading spring 3
The load control accuracy that must be needed.
Host computer will control setup parameter (loading mode, loading force, loading velocity etc.) to be sent to controller；Controller is adopted
The load deflection signal of collection testing machine output and the loading force signal of small-load sensor output, are calculated by closed loop control algorithm
And output control amount；Controller will load data (displacement, power) and be sent to host computer with display in real time and calculate storage.
Compared to the prior art compared with the present invention possesses following advantage：
1) big load testing machine is difficult to small load precise control, and the present invention uses spring charging device by testing machine
Output displacement is converted to small loading force, and loading force control accuracy Δ F depends on testing machine output displacement precision Δ L and spring is firm
Degree K, i.e.,：
Δ F=Δs L × K
Generally in the case where displacement of testing machine control accuracy is enough, by adjusting spring rate by obtain need load
Lotus control accuracy；The present invention has more preferable control accuracy compared with big load testing machine directly controls small load manner；
2) the small loading force that the present invention is born using small-load sensor measurement test specimen, range is small with experiment demand
Loading force is matched, and has more preferable certainty of measurement compared with the big load sensor of testing machine itself.
3) present invention is calculated using outside small load control system by close-loop control mode and Control experiment seat in the plane is moved
Output, can be according to specimen stiffness and experiment demand regulation control parameter, with more preferable flexibility and adaptability.
In a word, it is of the invention by the small load charger in a set of outside and control system, using the displacement control of testing machine
The small load precise control of functional realiey processed.Improve big load testing machine small load control accuracy, expand range of application and
Versatility, reduces equipment investment.
Brief description of the drawings
Fig. 1 is the functional block diagram of the small load closed-loop control system of big load testing machine of the present invention.
Fig. 2 is small load charger structure chart of the invention.
Fig. 3 is small load control system structure chart of the invention.
Fig. 4 is the control method figure of the small load control system of big load testing machine of the present invention.
Specific embodiment
Structure of the invention and operation principle are described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, small load charger is turned by the displacement that spring-feel mechanism exports big load testing machine
It is changed to small load and is applied to test specimen, test specimen is forced through small-load sensor measurement.Small load control system is used to gather
Big load displacement of testing machine and the small load of test specimen, are calculated and output closed-loop command displacement amount by closed loop control algorithm.It is big to carry
Lotus testing machine is connected by external interface and small load control system, and small load control system passes through the first analog input end
The displacement signal of mouth collection big load testing machine controller output, gathers small load loading and fills by the second simulation input port
Put the small load signal of test specimen of middle small-load sensor measurement.Displacement and load signal send into controller, control as feedback quantity
Amount processed is small load, and command displacement is calculated using closed loop control algorithm, and big load is exported and sent into through simulation output port
Testing machine controller carries out Bit andits control.Big load is realized by big load testing machine and small load control system Collaborative Control
The small load closed-loop control of testing machine.
As shown in Fig. 2 the concrete structure of small load charger is：Including making to be pressed from both sides on moving cell with big load testing machine
The upper fixture 1 of head connection, guide post 2 is connected with upper fixture 1 using piston guide mode, and loading spring 3 is arranged on guide post 2
On, the lower end of guide post 2 is connected through a screw thread with upper platen 5, and guide post 2 is used to ensure that loading spring 3 is axially deformed, and prevents bullet
Spring unstability and bias；Limit switch 4 is arranged on the upper surface of upper platen 5, and position limitation protection is compressed for loading spring 3；Also include with
The lower clamp 9 of big load testing machine lower chuck connection, small-load sensor 8 is arranged on lower clamp 9, and pressing disc 7 is arranged on small
On load transducer 8, test specimen 6 is placed between platen 5 and pressing disc 7；Big load testing machine start is displaced through upper fixture 1 and passes
Pass loading spring 3, the compressive deformation of loading spring 3 produces compressive load to pass to test specimen 6, pressing disc 7 and small by upper platen 5
Load transducer 8, each part uses cascaded structure, the load equivalence that big load testing machine compression-loaded spring 3 is produced to pass to
Test specimen 6 and small-load sensor 8.
As shown in figure 3, small load control system includes host computer, controller, simulation input and simulation output equipment.On
Position machine will control setup parameter (loading mode, loading force, loading velocity etc.) to be sent to controller；Controller collection big load examination
The load deflection signal of machine output and the loading force signal of small-load sensor output are tested, is calculated by closed loop control algorithm and defeated
Go out controlled quentity controlled variable；Controller will load data (displacement, power) and be sent to host computer with display in real time and calculate storage.
As shown in figure 4, the control method of the described small load control system of big load testing machine, small load control system
The core of system is peripheral control unit, and input quantity is the target load of program setting, and feedback quantity is working as big load testing machine output
Preceding displacement and the current load of small-load sensor measurement, it is defeated that controller calculates Bit andits control amount by closed loop control algorithm
Enter big load testing machine, produce load deflection push the spring load maintainer to realize small loading force closed-loop control output function.
Claims (4)
1. a kind of small load control system of big load testing machine, it is characterised in that：Including small load charger and small
Load control system；The small load charger includes that making the spring that moving cell upper grip is connected with big load testing machine adds
Mounted mechanism, the test specimen being connected with spring-feel mechanism, and the small-load sensor being connected with test specimen, small-load sensor are installed
Make on moving cell lower chuck in big load testing machine；The small load control system includes what controller and controller were connected
Host computer and simulation imput device and simulation output equipment；Small load charger passes through spring-feel mechanism by big load
The displacement of testing machine output is converted to small load and is applied to test specimen, and test specimen is forced through small-load sensor measurement；Big load
Testing machine is connected by the controller of external interface and small load control system；The host computer of small load control system will be controlled
Setup parameter processed is that loading mode, loading force, loading velocity are sent to controller, controller pass through simulation imput device first
The displacement signal of simulation input port collection big load testing machine controller output, the second simulation by simulation imput device is defeated
Inbound port gathers the small load signal of test specimen of small-load sensor measurement in small load charger, displacement and load signal
Controller is sent into as feedback quantity, controlled quentity controlled variable is small load, and command displacement is calculated using closed loop control algorithm, defeated through simulating
The simulation output port for going out equipment exports and sends into big load testing machine controller and carries out Bit andits control；By big load testing machine
With the small load closed-loop control that small load control system Collaborative Control realizes big load testing machine.
2. a kind of small load control system of big load testing machine according to claim 1, it is characterised in that：It is described small
The concrete structure of load charger is：Including making the upper fixture (1) that moving cell upper grip is connected with big load testing machine, it is oriented to
Bar (2) is connected with upper fixture (1) using piston guide mode, loading spring (3) on guide post (2), under guide post (2)
End is connected through a screw thread with upper platen (5), and guide post (2) is axially deformed for ensureing loading spring (3), prevents spring unstability
And bias；Limit switch (4) compresses position limitation protection installed in upper platen (5) upper surface for loading spring (3)；Also include with
Big load testing machine lower chuck connection lower clamp (9), small-load sensor (8) on lower clamp (9), pressing disc (7)
On small-load sensor (8), test specimen (6) is placed between platen (5) and pressing disc (7)；Big load testing machine start
It is displaced through upper fixture (1) and passes to loading spring (3), loading spring (3) compressive deformation produces compressive load by upper platen
(5) test specimen (6), pressing disc (7) and small-load sensor (8) are passed to, each part uses cascaded structure, big load testing machine pressure
The load equivalence that contracting loading spring (3) is produced passes to test specimen (6) and small-load sensor (8).
3. the control method of the small load control system of big load testing machine described in any one of claim 1 or 2, its feature exists
In：The core of small load control system is peripheral control unit, and input quantity is the target load of program setting, and feedback quantity is big load
The current displacement of lotus testing machine output and the current load of small-load sensor measurement, controller pass through closed loop control algorithm meter
Bit andits control amount input big load testing machine is calculated, produces load deflection push the spring load maintainer to realize small loading force closed loop control
Output function processed.
4. control method according to claim 3, it is characterised in that：Loading force control accuracy Δ F is tried depending on big load
The stiffness K of machine output displacement precision Δ L and loading spring (3) is tested, i.e.,：
Δ F=Δs L × K
In the case where big load displacement of testing machine control accuracy is enough, it is obtained in that by adjusting loading spring (3) stiffness K
The load control accuracy of needs.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560933A (en) * | 2017-10-25 | 2018-01-09 | 北京富力通达科技有限公司 | A kind of device and method of big load testing machine loading and measurement |
| CN108519438A (en) * | 2018-01-24 | 2018-09-11 | 浙江理工大学 | A kind of axial force high-precision loading device for elastic wave test |
| CN114252362A (en) * | 2021-12-02 | 2022-03-29 | 北京建筑大学 | Biaxial loading fretting wear testing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274840A (en) * | 1999-05-21 | 2000-11-29 | 浙江工业大学 | Automatically loading small-force test equipment with elastic pressure head |
| CN1790209A (en) * | 2005-11-25 | 2006-06-21 | 广东工业大学 | Liquid driven ultra-micro-displacement control device and control method |
| CN101337330A (en) * | 2008-08-01 | 2009-01-07 | 东南大学 | Compensation process capable of increasing machine precision of numerical-controlled lathe and magnetic striction compensation mechanism |
| CN201464350U (en) * | 2009-06-26 | 2010-05-12 | 李伟文 | Concrete beam loading test device |
| CN104359662A (en) * | 2014-11-11 | 2015-02-18 | 河海大学常州校区 | Cylindrical compression spring parameter testing method |
-
2017
- 2017-04-13 CN CN201710243071.8A patent/CN106908313B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274840A (en) * | 1999-05-21 | 2000-11-29 | 浙江工业大学 | Automatically loading small-force test equipment with elastic pressure head |
| CN1790209A (en) * | 2005-11-25 | 2006-06-21 | 广东工业大学 | Liquid driven ultra-micro-displacement control device and control method |
| CN101337330A (en) * | 2008-08-01 | 2009-01-07 | 东南大学 | Compensation process capable of increasing machine precision of numerical-controlled lathe and magnetic striction compensation mechanism |
| CN201464350U (en) * | 2009-06-26 | 2010-05-12 | 李伟文 | Concrete beam loading test device |
| CN104359662A (en) * | 2014-11-11 | 2015-02-18 | 河海大学常州校区 | Cylindrical compression spring parameter testing method |
Non-Patent Citations (2)
| Title |
|---|
| 安增勇等: ""一种高精度力输出系统"", 《2012 2ND INTERNATIONAL CONFERENCE ON AEROSPACE ENGINEERING AND INFORMATION TECHNOLOGY》 * |
| 徐霞等: ""力学加载实验的微小压力测量控制的装置研究"", 《压电与声光》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560933A (en) * | 2017-10-25 | 2018-01-09 | 北京富力通达科技有限公司 | A kind of device and method of big load testing machine loading and measurement |
| CN108519438A (en) * | 2018-01-24 | 2018-09-11 | 浙江理工大学 | A kind of axial force high-precision loading device for elastic wave test |
| CN108519438B (en) * | 2018-01-24 | 2021-01-12 | 浙江理工大学 | Axial force high-precision loading device for elastic wave detection |
| CN114252362A (en) * | 2021-12-02 | 2022-03-29 | 北京建筑大学 | Biaxial loading fretting wear testing machine |
| CN114252362B (en) * | 2021-12-02 | 2024-03-19 | 北京建筑大学 | Double-shaft loading fretting wear testing machine |
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| CN106908313B (en) | 2019-06-04 |
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