CN106840566B - High speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement - Google Patents
High speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement Download PDFInfo
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- CN106840566B CN106840566B CN201710133869.7A CN201710133869A CN106840566B CN 106840566 B CN106840566 B CN 106840566B CN 201710133869 A CN201710133869 A CN 201710133869A CN 106840566 B CN106840566 B CN 106840566B
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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
- G01M7/02—Vibration-testing by means of a shake table
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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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- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangements, including electromagnetic vibration generator system, pedestal liner plate, sliding rail, auxiliary liner plate, linear magneto, concave station, acceleration signal Acquisition Circuit, laser opposite-radiation sensor, DSP control circuit;The pedestal liner plate is tightly fixed on the table top of electromagnetic vibration generator system;Sliding rail is mounted on pedestal liner plate;Concave station is provided with the groove with sliding rail cooperation, can be along sliding rail straight reciprocating motion;Linear Magnetor stator part is fixed on pedestal liner plate, and subpart is connected with concave station, realizes fast feed and the rollback of concave station;Laser opposite-radiation sensor emission end is installed on pedestal liner plate, and receiving end is installed on auxiliary liner plate, is respectively in sliding rail two sides, acceleration signal Acquisition Circuit is located in concave station and the output of laser opposite-radiation sensor is all connected in DSP control circuit.The present invention has high dynamic response ability, can meet the needs of high speed repeat impact vibration coupling test.
Description
Technical field
The present invention relates to environmental mechanics test in impact-vibration testing device, in particular to one kind can be used for impacting-shake
The fixture of dynamic coupling environmental test and the feed arrangement with high dynamic response ability design.
Background technique
High speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement are mainly used for realizing high-precision cipher telegram
Sub- device, such as gyroscope detect guidance unit, the impact-vibration experienced in its actual application such as accelerometer with high g values
Dynamic compound mechanics environmental simulation, can examine the structural strength of Related product, anti shock and vibration performance and corresponding software control
Strategy provides a kind of more efficiently test method for the research and development, production and assessment of performance of product.
Existing impact test equipment mainly has Machete hammer, and air bubble, Hopkinson bar etc., vibration rig is main
There is an electromagnetic vibration generator system, electro-hydraulic shaker table, mechanical vibration generator system etc., above equipment obtained answering extensively in various dynamic environmental tests
With still, above-mentioned environment simulation test system only has single shock environment or single vibration environmental simulation ability, for some
Particular application, equipment can undergo the compound action of shock loading and oscillating load, position caused by this compound action simultaneously
Offset is set, malformation even allomeric function failure is not the simple linear superposition of single load.Existing research shows that multiple
Closing environmental test more can effectively excite product failure than single environment test, and essential reason is system under combinational environment
Apparent nonlinear change can occur for structural parameters.Therefore, impact-vibration coupling environmental test system is proposed in engineering to grind
Hair demand.
Summary of the invention
The purpose of the present invention is to provide a kind of reliable design, work safety, the higher impacts of the degree of automation-vibration coupling
Cyclization border test fixture and feed arrangement can be used for impacting-vibration coupling environmental simulation test, overcome conventional impact experimental bench and
Vibration experiment table only has single environment analog capability, cannot really reflect lacking for failure problems essential reason under combinational environment
Point;Based on the electromagnetic type feed system that linear magneto is constituted, overcomes conventional hydraulic feed system and take up a large area, dynamic
Low-response, the working condition disadvantage big by external environmental interference, has fast dynamic response ability, can meet high speed repeat impact
Test demand.
Technical solution of the invention are as follows: the invention proposes a kind of high speed reciprocating impact-vibration coupling test fixtures
And quick response feed arrangement, including electromagnetic vibration generator system, pedestal liner plate, sliding rail, auxiliary liner plate, linear magneto, concave station, plus
Speed signal Acquisition Circuit, laser opposite-radiation sensor, DSP control circuit;The pedestal liner plate is tightly fixed to electric and magnetic oscillation
On the table top of platform, required mechanical oscillation can be generated jointly with table top;Sliding rail is mounted on pedestal liner plate;Concave station is provided with and sliding rail
The groove of cooperation forms guiding mechanism, can be along sliding rail straight reciprocating motion;Linear Magnetor stator part is fixed on pedestal lining
On plate, subpart be connected with concave station, it can be achieved that concave station fast feed and rollback;The installation of laser opposite-radiation sensor emission end
In on pedestal liner plate, receiving end is installed on auxiliary liner plate, is respectively in sliding rail two sides, and output is connected to DSP control circuit
The port I/O;Acceleration signal Acquisition Circuit is located in concave station, and output is connected to the port I/O of DSP control circuit, can be real-time
Acquire the acceleration value on test specimen.
In further specific embodiment, the concave station includes lower position block, spring, keeping body, upper limit position block, guarantor
Hold lid;Lower position block is arranged at the concave station bottom, is connected by bolt with shell, the displacement that limitation keeping body moves downward;Concave station
Upper limit position block, the displacement that limitation keeping body moves upwards are arranged at top;Spring one end connects concave station bottom, and one end connects keeping body,
Impaction state is kept, keeping body is pressed on upper limit position;To keep lid at the top of keeping body, by bolt and body sidewall is kept
Close connection.
In further specific embodiment, acceleration signal Acquisition Circuit is located in keeping body, and output is connected to DSP
The port I/O of control circuit can acquire the acceleration value on test specimen in real time.
Further include initial limited block, in place limited block in further specific embodiment, the fast feed of concave station and returns
It moves back;Its feed distance is limited by limited block in place, and retraction stroke is limited by initial limited block.
It further include rollback location switch, feeding location switch, laser opposite-radiation sensing in further specific embodiment
Device transmitting terminal is installed on pedestal liner plate, and receiving end is installed on auxiliary liner plate, is respectively in sliding rail two sides, position and rollback are in place
The signal of switch matches, and output is connected to the port I/O of DSP control circuit.
In further specific embodiment, the rollback location switch is mounted on auxiliary liner plate, trigger position
With initial limited block position consistency, output is connected to the port I/O of DSP control circuit;Feeding location switch is mounted on auxiliary lining
On plate, trigger position and limited block position consistency in place, output are connected to the port I/O of DSP control circuit;
In further specific embodiment, the DSP control circuit includes: laser-correlation sensor by detecting,
Rollback detects in place, and feeding detects in place, and judgement, linear magneto movement/stopping control being blocked in operation.
High speed reciprocating impact-vibration coupling test fixture of the invention and quick response feed arrangement have following significant
Advantage and advantage:
(1) can be used for impacting-combined environment testing is vibrated, it can further reflect high-precision electronic under certain special duty faces
The particular surroundings that device is subjected to is conducive to the origin cause of formation for finding failure problems under combinational environment, overcomes existing single environment mould
The deficiency of quasi- test method.
(2) by reasonably changing experimental condition, single shock environmental test or single vibration environment can also be realized
Test, enriches the test capability of whole system, can meet the needs of variety classes dynamic environmental test.
(3) the quick response Design of Feed System based on electromagnetic type, it is slow to overcome conventional hydraulic feed system dynamic response,
Working condition is influenced by external conditions such as temperature, and occupied area is wide, and cost is high, and hydraulic station needs long term maintenance etc. to lack
Point.
(4) based on correlation laser sensor and the design of High Performance DSP control circuit, it can be achieved that test specimen to be measured it is accurate from
Dynamic feeding, is fed to operating position for test specimen to be measured in window time, both ensure that the validity of test, also improved system
The degree of automation.
(5) based on rollback location switch, feeding location switch and the design of DSP control circuit, it can be achieved that actuating mechanism moves
To designated position, linear magneto is protected in the timely automated power-off of electromagnetism feed mechanism current supply circuit.
(6) based on the acceleration sample circuit design being mounted on inside keeping body, can accurately reflect on test specimen to be measured
Acceleration value, and realize the storage of test data, the processing such as recycling analysis.
Detailed description of the invention
Fig. 1 is high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement overall structure of the invention
Schematic diagram
Fig. 2 is concave station part detail view in Fig. 1
Component indicated by above each appended drawing reference as shown in the figure is respectively as follows:
1, electromagnetic vibration generator system;2, pedestal liner plate;3, sliding rail;4, liner plate is assisted;5, linear magneto;6, initial limit
Block;7, limited block in place;8, concave station;9, lower position block;10, spring;11, keeping body;12, upper limit position block;13, lid is kept;14,
Acceleration signal Acquisition Circuit;15, laser opposite-radiation sensor;16, rollback location switch;17, location switch is fed;18,DSP
Control circuit.
Specific embodiment
Below with reference to Fig. 1 to Fig. 2, the present invention will be described in detail, with the application example that the present invention is further explained, if
Meter scheme and feature advantage.
High speed reciprocating impact-vibration coupling test fixture of the invention and quick response feed arrangement, can be used for impacting-shake
Dynamic combined environment testing, can further reflect the particular surroundings that high-precision electronic device is subjected under certain special duty faces.Packet
Include electromagnetic vibration generator system 1, pedestal liner plate 2, sliding rail 3 assists liner plate 4, linear magneto 5, initial limited block 6, in place limited block
7, concave station 8, lower position block 9, spring 10, keeping body 11, upper limit position block 12, keep lid 13, acceleration signal Acquisition Circuit 14, swash
Light emission sensor 15, rollback location switch 16 feed location switch 17, DSP control circuit 18.
The pedestal liner plate 2 is tightly fixed on 1 table top of electromagnetic vibration generator system, and pedestal liner plate 2 can be with 1 table top of electromagnetic vibration generator system
Associated movement, remaining part are based on the installation of pedestal liner plate 2, can be loaded by controlling the vibration of electromagnetic vibration generator system to test specimen to be measured
Required oscillating load.
The sliding rail 3 is mounted on pedestal liner plate 2, and 8 shell of concave station is provided with the groove with sliding rail cooperation, forms Guiding machine
Structure can be slided along guide rail;Limited block 7 in place and initial limited block 6 are installed on the stroke of sliding rail 3, for limiting concave station 8
Stroke.During concave station 8 is fed, assigned work position is stopped at by touching limited block 7 in place;Likewise, being returned in concave station 8
During moving back, initialization position is stopped at by touching initial limited block 6.
The stationary part of the linear magneto 5 is fixed on pedestal liner plate 2, and subpart is connected with concave station 8, driving
Concave station mechanism carries out feeding and fallback action.
Lower position block 9 is arranged at 8 bottom of concave station, is connected by bolt with shell, the position that limitation keeping body 11 moves downward
It moves;There is upper limit position block 12 at the top of concave station 8, the displacement that limitation keeping body 11 moves upwards can by the limitation of upper and lower limits block
Keeping body 11 is set to make the reciprocating motion of limited travel along concave station inner wall;10 one end of spring connects concave station bottom, and one end connection is kept
Body 11, keeps impaction state under normal circumstances, and keeping body 11 is pressed on upper limit position, under percussion, spring 10 into
The compression of one step, keeping body 11 move downwardly to lower limit position, and the test specimen to be measured inside keeping body 11 generates overloading acceleration.It protects
It holds at the top of body 11 to keep lid 13, is closely connect by bolt with 11 side wall of keeping body, for fixing and compressing test specimen to be measured.
15 transmitting terminal of laser opposite-radiation sensor is installed on pedestal liner plate 2, and receiving end is installed on auxiliary liner plate 4
On, sliding rail two sides are respectively in, position is matched with the useful signal stroke of rollback location switch 16.When the feeding of concave station 8 is left just
Beginning position, after causing 16 signal of rollback location switch to jump, by triggering 15 signal of laser opposite-radiation sensor jump, output connects
It is connected to the port I/O of DSP control circuit.
The feeding location switch 17 is mounted on auxiliary liner plate 4, signal trigger position and 7 position one of limited block in place
It causes, output is connected to the port I/O of DSP control circuit, when test specimen to be measured completion feed motion, and in the work of limited block 7 in place
Behind lower arrival assigned work position, synchronous trigger is fed into location switch 17, linear magnetoelectricity is cut off after of short duration delay
The current supply circuit of machine prevents the mistake cause thermal damage of its mover;Likewise, the rollback location switch 16 is mounted on auxiliary liner plate 4,
Its signal trigger position and initial 6 position consistency of limited block, output is connected to the port I/O of DSP control circuit, when test specimen to be measured
Fallback action is completed, and after stopping at initial position under the limitation of initial limited block 6, triggers rollback location switch for synchronous
16, the current supply circuit of linear magneto is cut off after of short duration delay, prevents the mistake cause thermal damage of its mover.
The acceleration signal Acquisition Circuit is located in keeping body, and output is connected to the end I/O of DSP control circuit
Mouthful, the test acceleration value on test specimen can be acquired in real time.
The DSP control circuit includes: laser-correlation sensor by detection, and rollback detects in place, and feeding is examined in place
It surveys, judgement, linear magneto movement/stopping control being blocked in operation.
Embodiment 1
With reference to the accompanying drawing and specific embodiment, the present invention will be further described.
In conjunction with Fig. 1, Fig. 2, high speed reciprocating impact-vibration coupling test fixture of the invention and quick response feed arrangement,
Including 1, electromagnetic vibration generator system;2, pedestal liner plate;3, sliding rail;4, liner plate is assisted;5, linear magneto;6, initial limited block;7,
Limited block in place;8, concave station;9, lower position block;10, spring;11, keeping body;12, upper limit position block;13, lid is kept;14, accelerate
Spend signal acquisition circuit;15, laser opposite-radiation sensor;16, rollback location switch;17, location switch is fed;18, DSP is controlled
Circuit.
Pedestal liner plate 2 is tightly fixed on 1 table top of electromagnetic vibration generator system, can be with 1 table top associated movement of electromagnetic vibration generator system, remaining
Component is based on the installation of pedestal liner plate 2, can be carried by controlling the vibration of electromagnetic vibration generator system to vibration needed for test specimen to be measured load
Lotus.
Sliding rail 3 is mounted on pedestal liner plate 2, and 8 shell of concave station is provided with the groove with sliding rail cooperation, forms guiding mechanism, can
It is slided along guide rail;Limited block 7 in place and initial limited block 6 are installed on the stroke of sliding rail 3, for limiting the stroke of concave station 8.
The stationary part of linear magneto 5 is fixed on pedestal liner plate 2, and subpart is connected with concave station 8, for driving concave station mechanism
Carry out feeding and fallback action.When work, after control system issues feed motion instruction, linear magneto 5 drives concave station
8, it is fed to operating position rapidly along sliding rail 3, stops at assigned work position by touching limited block 7 in place, carry out impact examination
It tests.After impact process, under the action of the instruction of control system fallback action, linear magneto 5 drives concave station 8 along sliding rail
3 retract to initialization position, stop at initial position by touching initial limited block 6.
Lower position block 9 is arranged at 8 bottom of concave station, is connected by bolt with shell, the displacement that limitation keeping body 11 moves downward;It is recessed
There is upper limit position block 12 at the top of platform 8, the displacement that limitation keeping body 11 moves upwards can make to keep by the limitation of upper and lower limits block
Body 11 makees the reciprocating motion of limited travel along concave station inner wall;10 one end of spring connects concave station bottom, and one end connects keeping body 11, just
Impaction state is kept in normal situation, keeping body 11 is pressed on upper limit position, under percussion, spring 10 is further pressed
Contracting, keeping body 11 move downwardly to lower limit position, and the test specimen to be measured inside keeping body 11 generates overloading acceleration.Keeping body 11
Top is to keep lid 13, is closely connect by bolt with 11 side wall of keeping body, for fixing and compressing test specimen to be measured.
15 transmitting terminal of laser opposite-radiation sensor is installed on pedestal liner plate 2, and receiving end is installed on auxiliary liner plate 4, point
3 two sides of sliding rail are listed in, position is matched with the useful signal stroke of rollback location switch 16, and output is connected to DSP control electricity
The port I/O on road.In usual situation, concave station 8 will not receive the transmitting of laser opposite-radiation sensor 15 and generate blocking, receive
End receives the light that end transmitting occurs always;After control system issues feed motion instruction, linear magneto 5 drives recessed
Platform 8 is moved to operating position, it will is emitted laser opposite-radiation sensor 15 and is received the primary blocking process of generation, is in particular in
Will appear on the signal of receiving end and jump twice, according to first time jump time point, in conjunction with front end turntable revolving speed and absolutely
Position data controls electromagnetism feed system and test specimen to be measured is fed into operating position in designed time window, guarantees punching
Hit the validity of test.
Feeding location switch 17 is mounted on auxiliary liner plate 4, signal trigger position and 7 position consistency of limited block in place,
Output is connected to the port I/O of DSP control circuit;When test specimen to be measured completion feed motion, and under the action of limited block 7 in place
After reaching operating position, synchronous trigger is fed into location switch 17, the power supply of linear magneto is cut off after of short duration delay
Circuit prevents the mistake cause thermal damage of its mover;Likewise, rollback location switch 16 is mounted on auxiliary liner plate 4, signal trigger bit
It sets and is connected to the port I/O of DSP control circuit with initial 6 position consistency of limited block, output, complete to retract when test specimen to be measured and move
Make, and after returning to initial position under the limitation of initial limited block 6, triggers rollback location switch 16 for synchronous, prolong by of short duration
When after cut off the current supply circuit of linear magneto, prevent the mistake cause thermal damage of its mover.Acceleration signal Acquisition Circuit 14 is located at
In holding, output is connected to the port I/O of DSP control circuit, and after work starts, DSP control circuit will acquire acceleration in real time
Signal is spent, on the one hand stores data to storage chip, is used for post-processing, real time acceleration on the one hand will be drawn and crosses carrier wave
Shape is transferred to system interface and shows.
The course of work
In conjunction with Fig. 1, Fig. 2, high speed reciprocating impact-vibration coupling test fixture of the invention and quick response feed arrangement work
It is as follows to make process:
After system work starts, electromagnetic vibration generator system 1 starts work first, mentions according to the input signal given to package unit
For high-frequency vibration, the oscillating load load of test specimen is realized.After system start-up, there are one for the big quality rotary impact platform of front end
Slow accelerator, the impact occurred at this time is considered invalid.It is artificial to issue feeding after turntable reaches setting speed
Action command, DSP control system is according to current turntable revolving speed, absolute position, the output of photoelectricity emission sensor, real-time control
Feed motion feeds test specimen to be measured in the window of design in place, completes Impulsive load;At this point, due to impact head impact and
The collective effect of electromagnetic vibration generator system vibration, obtains impact-vibration combinational environment on test specimen to be measured.After system work starts, add
Speed sampling circuit acquires test specimen acceleration signal to be measured in real time, on the one hand stores original data transmissions to storage chip, supplies
Later period recovery processing;On the one hand real time acceleration waveform is drawn, front end is transmitted to and shows.
A whole set of test fixture and its feed arrangement have complete design protection, after concave station moves to operating position, touching
Hair feeding location switch output, DSP control system think that feeding process is completed after detecting the signal, will after of short duration delay
The current supply circuit for cutting off linear magneto protects the mover of magneto not damage because of overheat.After the test, manually
Fallback action instruction is issued, linear magneto counter motion retracts concave station to initial position, rollback location switch is triggered,
DSP control system thinks that back off procedure is completed after detecting the signal, cuts off linear magnetoelectricity after also passing through of short duration delay
The current supply circuit of machine protects the mover of magneto not damage because of overheat.In addition, when feed motion instruction and fallback action
After instruction issues, if being not detected in certain time, laser opposite-radiation sensor output signal is jumped or feeding/rollback is opened in place
Output is closed, then system judges automatically feeding/rollback failure, cuts off linear magneto power supply circuit in time, prevents magnetoelectricity machine burning
It ruins, meanwhile, failure alarm signal is issued, operator's processing is prompted.
High speed reciprocating impact-vibration coupling test fixture of the invention and quick response feed arrangement can be applied to impact-
Combined environment testing is vibrated, conventional impact experimental bench and vibration experiment table is overcome and only has lacking for single environment analog capability
It falls into, can further reflect particular job environment that high-precision electronic device is subjected under certain special duty faces, system design can
It leans on, work safety, the degree of automation is higher.
Claims (7)
1. a kind of high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement, it is characterised in that: including electromagnetism
Shake table (1), pedestal liner plate (2), sliding rail (3), auxiliary liner plate (4), linear magneto (5), concave station (8), acceleration signal
Acquisition Circuit (14), laser opposite-radiation sensor (15), DSP control circuit (18);The pedestal liner plate (2) is tightly fixed to electricity
On the table top of magnetic vibration platform (1), required mechanical oscillation can be generated jointly with table top;Sliding rail (3) is mounted on pedestal liner plate (2)
On;Concave station (8) is provided with the groove with sliding rail cooperation, forms guiding mechanism, can be along sliding rail straight reciprocating motion;Described is linear
Magneto (5) stationary part is fixed on pedestal liner plate (2), subpart be connected with concave station (8), it can be achieved that concave station (8) it is fast
Speed feeding and rollback;Described laser opposite-radiation sensor (15) transmitting terminal is installed on pedestal liner plate (2), and receiving end is installed on
It assists on liner plate (4), is respectively in sliding rail (3) two sides, output is connected to the port I/O of DSP control circuit (18);Described adds
Speed signal Acquisition Circuit (14) is located in concave station (8), and output is connected to the port I/O of DSP control circuit (18), can be real-time
Acquire the acceleration value on test specimen.
2. high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement according to claim 1, feature
Be: the concave station (8) includes lower position block (9), spring (10), keeping body (11), upper limit position block (12), keeps lid
(13);Lower position block (9) are arranged at concave station (8) bottom, are connected by bolt with shell, what limitation keeping body (11) moved downward
Displacement;Have upper limit position block (12) at the top of concave station (8), the displacement that limitation keeping body (11) moves upwards;The connection of spring (10) one end
Concave station bottom, one end connect keeping body (11), keep impaction state, keeping body (11) is pressed on upper limit position;Keeping body
(11) top is closely connect by bolt with keeping body (11) side wall to keep lid (13).
3. high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement according to claim 2, feature
Be: acceleration signal Acquisition Circuit (14) is located in keeping body (11), and output is connected to the port I/O of DSP control circuit,
The acceleration value on test specimen can be acquired in real time.
4. high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement according to claim 1, feature
It is: further includes initial limited block (6), in place limited block (7), feed distance is limited by limited block in place (7), retraction stroke
It is limited by initial limited block (6).
5. high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement according to claim 1, feature
It is: further includes rollback location switch (16), feeding location switch (17), laser opposite-radiation sensor (15) transmitting terminal is installed on
On pedestal liner plate (2), receiving end is installed in auxiliary liner plate (4), is respectively in sliding rail (3) two sides, position and rollback location switch
(16) signal matches, and output is connected to the port I/O of DSP control circuit (18).
6. high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement according to claim 5, feature
Be: the rollback location switch (16) is mounted in auxiliary liner plate (4), trigger position and initial limited block (6) position
Unanimously, output is connected to the port I/O of DSP control circuit (18);Feeding location switch (17) is mounted in auxiliary liner plate (4),
Its trigger position and limited block (7) position consistency in place, output are connected to the port I/O of DSP control circuit (18).
7. high speed reciprocating impact-vibration coupling test fixture and quick response feed arrangement according to claim 1, feature
Be: the DSP control circuit (18) includes: laser-correlation sensor by detection, and rollback detects in place, and feeding is examined in place
It surveys, judgement, linear magneto movement/stopping control being blocked in operation.
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CN108399417B (en) * | 2018-01-22 | 2020-08-04 | 航天科工防御技术研究试验中心 | Signal separation method for multi-axis vibration and impact composite environment test |
CN108254149B (en) * | 2018-01-22 | 2019-12-17 | 航天科工防御技术研究试验中心 | Multi-axis vibration and impact composite environment test system |
CN108760205B (en) * | 2018-06-21 | 2023-11-03 | 南京理工大学 | Self-excitation type impact-vibration composite test fixture and feeding device thereof |
CN111751227B (en) * | 2020-08-03 | 2021-09-17 | 哈尔滨工程大学 | Impact testing device and experimental method based on space motion sandwich plate structure |
CN112525578B (en) * | 2020-12-09 | 2022-06-07 | 中国工程物理研究院总体工程研究所 | Environmental test device and test method for self-heating device |
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