CN106679922A - System for actively controlling the generation of control load waveforms - Google Patents
System for actively controlling the generation of control load waveforms Download PDFInfo
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- CN106679922A CN106679922A CN201510761609.5A CN201510761609A CN106679922A CN 106679922 A CN106679922 A CN 106679922A CN 201510761609 A CN201510761609 A CN 201510761609A CN 106679922 A CN106679922 A CN 106679922A
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- Prior art keywords
- impact
- controller
- acceleration
- magnetic
- piston
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- 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
- G01M7/08—Shock-testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to the impact test technology field and more particularly, to a system for actively controlling the generation of control load waveforms. The system comprises a piston apparatus, a data acquisition device, a controller and a magnetic field generating device. The magnetic field generating device is mounted on the piston device. The piston device uses magnetorheological fluid as its dielectric. The controller saves a theoretical waveform for the impact test in advance. The data acquisition device acquires the impact acceleration speed of the test station in real time and transmits the acceleration speed value to the controller. The controller, based on the pre-saved theoretical waveform for the impact test, compares the impact acceleration speed acquired in real time with a targeted acceleration speed. If the acquired impact acceleration speed is greater than the targeted acceleration speed, then, the current intensity of the magnetic field generation device is reduced; and if the acquired impact acceleration speed is smaller than the targeted acceleration speed, then, the current intensity of the magnetic field generation device is increased. The device of the invention is capable of accurately controlling the load waveforms and can be applied widely.
Description
Technical field
The invention belongs to impact test technical field, more particularly to a kind of active control load waveform
Generation system.
Background technology
Impact acceleration waveform modelling is the key technology of impact test, common are deceleration examination
Test the method with two kinds of generation surge waveforms of acceleration test.
Acceleration test is generally closed-loop control, and with power as control object, loading system is to test
Platform applies impulsive force, and brake system applies opposite force to testing stand, and two impulsive forces are made a concerted effort
Determine the amplitude and pulsewidth of impact.Such test needs to have demarcated loading system in advance, it is desirable to
The load repeatability that loading system is produced under same control condition is as well as possible.Need basis simultaneously
By the weight and inertia of testpieces, design simulation part, simulating piece is arranged on into testing stand before test
On, for simulating really by test specimen, for debugging the control parameter of brake system.Common
Brake system is friction type brake piece, determines clamping to act on normal direction on friction plate for brake weight
Coefficient of friction between power and gripping block and friction plate, it is considered that coefficient of friction is non-adjustable, but
As the increase of the degree of wear may change.Changed by changing normal direction clamping force in debugging test
Change acts on the waveform on testing stand, because clamping force is typically provided by hydraulic system, by control
Flow processed and pressure realize the control of load, due to the restriction of valve characteristic, so cannot accomplish to close
Ring is controlled, and when the impact test of some complex models is carried out, needs the substantial amounts of time to enter traveling wave
Shape is debugged, and the effect of waveform debugging is sometimes nor especially desirable.
Deceleration test is similarly opened loop control, and in the presence of acceleration system, testing stand is added
Then speed clash into waveform generating system to predetermined speed, and waveform generating system is to testing stand
Effect deceleration damping force, so as to produce the waveform of requirement.Waveform for deceleration test occurs
System has many types, is broadly divided into reusable waveform generating system and not reproducible makes
Waveform generating system.
In the impact test for needing greater impact stroke, reusable waveform generating system
More with hydraulic oil, water etc. as medium, based on orifice restriction principle, by compressing incompressible flow
Body produces damping force and produces decelerative loads by damping hole, due to the damping hole that different wave is required
Combining form is different, generally requires to take a substantial amount of time and is debugged.
Not re-usable waveform generating system type is a lot, more based on control ad hoc structure
Energy absorption process controlling waveform, can use it is various can the metal of conquassation, non-metallic tubing or
Structural member, the output characteristics of this type waveform generating system is closely related with structure and material performance,
Therefore the performance of each batch is often different.Simultaneously different waveforms needs to design different structures,
Flexibility is poor.
The content of the invention
Present invention solves the technical problem that：There is provided one kind can be precisely controlled the generation of load waveform,
Using the wide load waveform generating system sent out.
Technical scheme：Described system includes piston apparatus, data acquisition unit, control
Device processed and field generator for magnetic, field generator for magnetic be arranged on piston apparatus on, piston apparatus with
Magnetic flow liquid is medium, and impact test theoretical waveform is prestored in controller；
The impact acceleration of data acquisition unit Real-time Collection testing stand, and the accekeration is transmitted
To controller, controller according to the impact test theoretical waveform for prestoring, by the real-time punching for collecting
Hit acceleration to be contrasted with aimed acceleration, if the impact acceleration for collecting is more than target
Acceleration, then the current strength reduction of field generator for magnetic；If the impact acceleration for collecting
Less than aimed acceleration, then the current strength increase of field generator for magnetic.
Improve as one kind of the technical program, the described magnetic field on piston apparatus is sent out
Generating apparatus are：The coil 6 being wrapped on piston apparatus piston 7.
Improve as one kind of the technical program, piston apparatus are also set with the outside of cylinder body 3
Outer cylinder body, is provided with multiple rows of damping hole 4 on cylinder body 3.
Improve as one kind of the technical program, in damping hole 4 internal thread is provided with.
Beneficial effects of the present invention：The waveform generating system is by adjusting current strength to adjust work
Magnetic field intensity near plug, and then magnetorheological fluid damp is adjusted so as to adjust waveform, it is also possible to pass through
The number and arrangement for adjusting opening damping hole comes the discharge area of adjusting means, so as to produce
The prefabricated waveform of life.Relative to common waveform generating system, the adjustable range of its waveform is bigger,
Waveform tunable performance is more preferable.The precise control to load waveform is the arrangement achieves, is widely used.
Description of the drawings
Fig. 1 is：Piston apparatus schematic diagram；
Fig. 2 is：The structural representation of the present invention；
Fig. 3 is：Piston structure schematic diagram；
In figure, 1 is impact head, and 2 is stopper rod, and 3 is cylinder body, and 4 is damping hole, and 5 is magnetic current
Become collection, 6 is coil, and 7 is piston.
Specific embodiment
The technical program is described in further detail below in conjunction with the accompanying drawings.
Waveform generating system agent structure is piston apparatus, by outer shell, piston, acceleration sensing
Device, field generator for magnetic, data acquisition unit, controller, industrial control computer, power supply,
Circuit is constituted.
Waveform generating system with magnetic flow liquid as medium, when piston drive magnetic rheological liquid flow through ripple
In shape generation system during prefabricated damping hole, due to orifice restriction, will act on piston reversely
Impact resistance.
Acceleration transducer is installed on shock table, is occurred when shock table clashes into waveform
During system, acceleration transducer adopts the acceleration on Real-time Collection testing stand by data
Controller is fed back to after the change of storage modulus；
Impact test is set in controller needs the theoretical waveform that reaches, as control targe plus
Speed, the real-time impact acceleration and the aimed acceleration that collect is contrasted, according to contrast
As a result the current strength acted on field generator for magnetic is changed by controller.
And contrasted with desired theoretical waveform, acted on by control system change magnetorheological
The viscous damping coefficient of the magnetic field intensity on liquid, increase or reduction magnetic flow liquid, so as to obtain
The specific damping force for needing, and then the surge waveform on Control experiment platform.
Accompanying drawing 1 to 3 show active control load waveform generating system, including impact head 1,
Piston rod 2, cylinder body 3, damping hole 4, magnetic flow liquid collector 5, coil 6, piston 7；
Impact head is connected with the one end of piston rod 2, and the piston rod other end is connected with piston 7, piston 7 with
Full of magnetic flow liquid in the blind-mate of cylinder body 3, cylinder body 3, the wound around coil 6 on piston 7,
Coil is drawn from piston rod 2, is connected into control system；Multiple rows of damping hole 4 is opened on cylinder body 3,
The prefabricated internal thread in the upper end of damping hole 4, it is not necessary to when can have plug to obturage, according to waveform adjustment need
Determine whether damping hole is obturaged, is open.Magnetic flow liquid collector 5 is installed on outside cylinder body.
Claims (4)
1. a kind of active control load waveform generating system, it is characterized by：Described system bag
Include piston apparatus, data acquisition unit, controller and field generator for magnetic, field generator for magnetic peace
It is mounted on piston apparatus, piston apparatus prestore impact with magnetic flow liquid as medium, in controller
Test theory waveform；
The impact acceleration of data acquisition unit Real-time Collection testing stand, and the accekeration is transmitted
To controller, controller according to the impact test theoretical waveform for prestoring, by the real-time punching for collecting
Hit acceleration to be contrasted with aimed acceleration, if the impact acceleration for collecting is more than target
Acceleration, then the current strength reduction of field generator for magnetic；If the impact acceleration for collecting
Less than aimed acceleration, then the current strength increase of field generator for magnetic.
2. a kind of active control load waveform generating system according to claim 1, its
It is characterised by, the described field generator for magnetic on piston apparatus is：It is wrapped in piston
Coil (6) on device piston (7).
3. a kind of active control load waveform generating system according to claim 1, its
It is characterized as：Piston apparatus are also set with outer cylinder body in the outside of cylinder body (3), in cylinder body (3)
On be provided with multiple rows of damping hole (4).
4. a kind of active control load waveform generating system according to claim 1, its
It is characterized as：Internal thread is provided with damping hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761609.5A CN106679922A (en) | 2015-11-10 | 2015-11-10 | System for actively controlling the generation of control load waveforms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761609.5A CN106679922A (en) | 2015-11-10 | 2015-11-10 | System for actively controlling the generation of control load waveforms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106679922A true CN106679922A (en) | 2017-05-17 |
Family
ID=58863790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510761609.5A Pending CN106679922A (en) | 2015-11-10 | 2015-11-10 | System for actively controlling the generation of control load waveforms |
Country Status (1)
| Country | Link |
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| CN (1) | CN106679922A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036910A (en) * | 2017-12-06 | 2018-05-15 | 武汉理工大学 | A kind of magnetorheological impulse generator of controllable intellectualized |
| CN109357847A (en) * | 2018-09-11 | 2019-02-19 | 中国飞机强度研究所 | A kind of high carrier wave shape generating assembly of wideband and the high carrier wave shape experimental rig of wideband |
| CN109870286A (en) * | 2017-12-04 | 2019-06-11 | 中国飞机强度研究所 | A kind of big stroke waveshape generating device of tandem |
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| RU2338169C1 (en) * | 2007-02-12 | 2008-11-10 | Федеральное государственное унитарное предприятие "Научно-производственное объединение прикладной механики им. академика М.Ф. Решетнева" | Method for high-intensity impact tests for instruments and equipment |
| CN101750202A (en) * | 2008-12-15 | 2010-06-23 | 王炅 | Impact test bed of magneto-rheological damper and impact test device |
| CN103630321A (en) * | 2013-11-25 | 2014-03-12 | 重庆大学 | System, method and device for evaluating buffering characteristic of magneto-rheological buffer |
| CN103742561A (en) * | 2014-01-11 | 2014-04-23 | 中国船舶重工集团公司第七�三研究所 | Bi-directional oil damping structure of synchronous automatic clutch |
| CN104315070A (en) * | 2014-08-26 | 2015-01-28 | 中国直升机设计研究所 | Adjustable damper device |
-
2015
- 2015-11-10 CN CN201510761609.5A patent/CN106679922A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2338169C1 (en) * | 2007-02-12 | 2008-11-10 | Федеральное государственное унитарное предприятие "Научно-производственное объединение прикладной механики им. академика М.Ф. Решетнева" | Method for high-intensity impact tests for instruments and equipment |
| CN101750202A (en) * | 2008-12-15 | 2010-06-23 | 王炅 | Impact test bed of magneto-rheological damper and impact test device |
| CN103630321A (en) * | 2013-11-25 | 2014-03-12 | 重庆大学 | System, method and device for evaluating buffering characteristic of magneto-rheological buffer |
| CN103742561A (en) * | 2014-01-11 | 2014-04-23 | 中国船舶重工集团公司第七�三研究所 | Bi-directional oil damping structure of synchronous automatic clutch |
| CN104315070A (en) * | 2014-08-26 | 2015-01-28 | 中国直升机设计研究所 | Adjustable damper device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870286A (en) * | 2017-12-04 | 2019-06-11 | 中国飞机强度研究所 | A kind of big stroke waveshape generating device of tandem |
| CN108036910A (en) * | 2017-12-06 | 2018-05-15 | 武汉理工大学 | A kind of magnetorheological impulse generator of controllable intellectualized |
| CN108036910B (en) * | 2017-12-06 | 2019-06-11 | 武汉理工大学 | A kind of magnetorheological impulse generator of controllable intellectualized |
| CN109357847A (en) * | 2018-09-11 | 2019-02-19 | 中国飞机强度研究所 | A kind of high carrier wave shape generating assembly of wideband and the high carrier wave shape experimental rig of wideband |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Binwen Inventor after: Liu Xiaochuan Inventor before: Liu Xiaochuan |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170517 |