CN107131178A - The servo-cylinder performance test methods and its test system of a kind of stiffness variable - Google Patents
The servo-cylinder performance test methods and its test system of a kind of stiffness variable Download PDFInfo
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- CN107131178A CN107131178A CN201610111113.8A CN201610111113A CN107131178A CN 107131178 A CN107131178 A CN 107131178A CN 201610111113 A CN201610111113 A CN 201610111113A CN 107131178 A CN107131178 A CN 107131178A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
Abstract
A kind of servo-cylinder performance test methods of stiffness variable, including step are as follows：1) stiffness K of AGC (Automatic Gage Control) servo-cylinder work rolling machine system to be tested, is collected0；2), when carrying out the test of AGC servo-cylinders, setting is connected between oil cylinder and test chassis, the cylindrical middle spacer for transmitting loading force；3) the rigidity value K of middle spacer, is calculated2；4) the Load test framework stiffness K during test of AGC servo-cylinders, is collected1；5) the rigidity value K of hydraulic cylinder, is calculatedh；6) stiffness K for the test system being made up of AGC servo-cylinders, middle spacer and test Load test framework, is obtainede, make K0=Ke, derive middle spacer diameter D1：In above formula, E, H1The respectively modulus of elasticity of middle spacer, height, π is pi.Thus, desired cylindrical middle spacer diameter is calculated, when realizing the test to the AGC servo-cylinders of different size, test system variable rigidity, and the test of variation rigidity can be realized on same Load test framework.
Description
Technical field
The present invention relates to hydraulic servo oil cylinder testing field, especially, it is applied to the present invention relates to one kind to strip-mill strip
Hydraulic pressing pushes to method of testing and its test system that the static state and dynamic property of servo-cylinder are tested.
Background technology
The present invention relates to static, the dynamic testing experiment method of hydraulic servo oil cylinder, the plate for the metallurgy industry that is particularly suitable for use in
Hoop mill gauge automatic control AGC (Automatic Gage Control) system hydraulic pressings or push to servo-cylinder it is dynamic,
Static test.
In modern strip-mill strip, the control of mill roll-gap is typically what is completed using fluid servo system.Hydraulic servo
Valve oil cylinder is rolling mill screwdown or pushes to one of key element of Hydrauservo System, and the quality of its performance directly affects hydraulic servo
The normal work of system, so as to finally influence the product quality of Strip.It is existing rolling mill AGC to be depressed or pushed to servo-cylinder
Performance test mainly include static test and dynamic two aspects of test, static test in servo-cylinder mainly including letting out
The indexs such as leakage, outward leakage, band loading friction force, startup pressure, dynamic test mainly includes the frequency range of servo-cylinder control system
Test etc. project etc..
In the test process of servo-cylinder, during such as test of band loading friction force and dynamic test, often
In the Load test framework that AGC servo-cylinders are placed on to a closing, loaded by Load test framework to AGC servo-cylinders.
Generally, during AGC servo-cylinders are tested, in order to ensure that the extension bar of servo-cylinder can be with Load test framework
Tip contact, and Load test framework can be suitably used for the test job of the AGC servo-cylinders of different size, in servo-cylinder and loading
A middle spacer is put between frame to ensure the close contact between them.However, in the dynamic friction of AGC servo-cylinders
During the test of the projects such as power, dynamic property, the survey of the integral stiffness of Load test framework and middle spacer to AGC servo-cylinders
Often there is very big influence in examination, and in the existing test process to AGC servo-cylinders, for being operated on different milling trains
AGC servo-cylinders, the rigidity of rolling machine system is differed.
On the other hand, existing method of testing can only provide a kind of rigidity constant test, realize the test of variation rigidity
Work, can only be the Load test framework for producing more different-stiffness values, it is impossible to the survey of variation rigidity is realized on same Load test framework
Examination, so, this degree of accuracy just to the test result of AGC servo-cylinders causes large effect, while also increasing to surveying
Try the investment of equipment.
Therefore, the problem of existing for the above to the method for testing of AGC servo-cylinders, in combination with rolling mill AGC servo oil
The test process at cylinder working scene, this area needs a kind of Load test framework rigidity a kind of on same Load test framework adjustable
AGC servo-cylinder method of testings.The method of testing can according to the rigidity of the rolling machine system of tested AGC oil cylinders real work come
The rigidity of test system under its AGC servo-cylinder measurement condition is set in, to ensure operating mode during test with oil cylinder in milling train
The working condition of work is consistent, that is, the equal stiffness of system stiffness when ensureing to test and real work rolling machine system.So both
The accuracy and practicality of test result are can guarantee that, and very big oil cylinder test equipment investment can be saved, significant warp can be brought
Ji benefit.
The content of the invention
For problem present in the existing test process to AGC servo-cylinders, the present invention proposes one kind and is applied to
A variety of AGC oil cylinders test process, can change the one of the rigidity of test system according to the AGC servo-cylinders of different size
Plant AGC servo-cylinder method of testings, it is ensured that the rigidity of test system and the equal stiffness of real work rolling machine system, both can guarantee that
The accuracy and practicality of test result, and very big oil cylinder test equipment investment can be saved, and thus bring significant economy
Benefit.
The present invention is set in its AGC servo-cylinder according to the rigidity of the rolling machine system of tested AGC oil cylinders real work
The rigidity of test system under measurement condition, it is consistent with the working condition that oil cylinder works in milling train with operating mode when ensureing test,
The equal stiffness of system stiffness and real work rolling machine system when ensureing to test.The accurate of test result was so both can guarantee that
Property and practicality, and very big oil cylinder test equipment investment can be saved, significant economic benefit can be brought.
According to the servo-cylinder performance test methods and its test system of stiffness variable of the present invention, there is provided one kind operation letter
Just, automaticity is high, measuring accuracy is high and adjusts the rigidity of system as needed to make when operating mode and the work during test
Test philosophy and method of testing and its test system that operating mode matches.
In order to realize foregoing invention purpose, a kind of technology of the servo-cylinder performance test methods of stiffness variable of the invention
Scheme is as follows：
The servo-cylinder performance test methods of a kind of stiffness variable, it is adaptable to which AGC servo-cylinders dynamic and static characteristic are surveyed
Test system can dynamically change the test of test system rigidity, using such a test system, and the test system mainly includes：
AGC servo-cylinders loading system, Hydrauservo System, signal acquisition and processing system, it is as follows that the method for testing includes step：
Step 1), collect the stiffness K of AGC servo-cylinders work rolling machine system to be tested0；
Step 2), when carrying out the test of AGC servo-cylinders, setting is connected between oil cylinder and test chassis, for transmitting
The middle spacer of loading force；
Step 3), calculate the rigidity value K of middle spacer2：
D1:The diameter value of middle spacer,
E：The modulus of elasticity of middle spacer,
H1：The height of middle spacer,
π：Pi；
Step 4), collect the Load test framework stiffness K during test of AGC servo-cylinders1；
Step 5), calculate the rigidity value K of hydraulic cylinderh, because the bulk modulus of cylinder body is the 100~150 of hydraulic oil
Times, the rigidity of hydraulic cylinder is calculated by hydraulic spring stiffness here：
Wherein, βe：The hydraulic oil bulk modulus of pressure during for corresponding to test,
Ac：The area of servo-cylinder rodless cavity,
D0：The piston diameter of servo-cylinder,
V0：The volume of AGC servoBcylinder rodless cavities
H0：The height of rodless cavity oil column；
Step 6), obtain the stiffness K e for the test system being made up of AGC servo-cylinders, middle spacer and test Load test framework
For：
Make K0=Ke, so that, derive：
Derive again：
Thus, desired cylindrical middle spacer diameter is calculated, is realized to the AGC servo-cylinders of different size
During test, test system variable rigidity, and the test of variation rigidity can be realized on same Load test framework.
According to a kind of servo-cylinder performance test methods of stiffness variable of the present invention, it is characterised in that to different rule
When the AGC oil cylinders of lattice are tested, in order to ensure the stiffness K of middle spacer2>0, so servo-cylinder test chassis can be surveyed
The rigidity of the work milling train of examination need to be in a range in stiffness, i.e. the stiffness K of AGC servo-cylinders work rolling machine system0<Loading
Housing rigidity K1。
So as to calculate desired cylindrical middle spacer diameter, realize to the AGC servo-cylinders of different size
Test so that test system variable rigidity.
According to a kind of servo-cylinder performance test methods of stiffness variable of the present invention, it is characterised in that for not
The AGC servo-cylinders of same specification, by the middle spacer from different-stiffness value, during rigidity value to change test system, institute
That states middle spacer is shaped as cylinder.
When carrying out the test of AGC servo-cylinders, the effect of the inventive method middle spacer is：One is to be connected to oil cylinder and survey
Between test-run a machine frame, loading force is transmitted；Two be the AGC servo-cylinders for different size, passes through the centre from different-stiffness value
Cushion block, changes the rigidity value of test system.Here the cylinder that is shaped as of middle spacer is taken, but is not limited to cylinder.
According to a kind of servo-cylinder performance test methods of stiffness variable of the present invention, it is characterised in that the K0Value
For the half of the rigidity value of real work rolling machine system.
Before AGC servo-cylinder tests are carried out, the mill stiffness value for wanting its work milling train is obtained：Work is obtained by pressing method
Make the rigidity of rolling machine system, because respectively there is a servo-cylinder both sides of real work milling train, and one is generally only tested when testing
Individual servo-cylinder, so taking K0For the half of the rigidity of real work rolling machine system.
According to a kind of servo-cylinder performance test methods of stiffness variable of the present invention, it is characterised in that the AGC is watched
Take the rigidity value K for testing Load test framework during oil cylinder test1, it can before testing test and draw, or the side for passing through theoretical calculation
Method is calculated and obtained.
According to a kind of servo-cylinder performance test methods of stiffness variable of the present invention, it is characterised in that surveyed calculating
The rigidity value K of middle spacer used in test system2When,
The height of middle spacer is determined according to the height value of Load test framework when the specification of tested AGC servo-cylinders and test
Spend H1；
H1=H-H2-H0 (8)
Wherein, H is the height of test Load test framework,
H2The height being fully retracted for AGC servo-cylinders,
H0：The height of rodless cavity oil column；
Obtain the rigidity value K of middle spacer2：
Wherein, E is the modulus of elasticity of cushion block；
Further, the diameter value D of middle spacer is obtained1：
It is by AGC servo-cylinders, middle spacer and the rigidity for testing the test system that Load test framework is constituted：
Make K0=Ke, so that, derive：
Derive again：
Its schematic diagram is as shown in Figure 1.
In order to realize foregoing invention purpose, a kind of technology of the servo-cylinder Performance Test System of stiffness variable of the invention
Scheme is as follows：
The servo-cylinder Performance Test System of a kind of stiffness variable, it is adaptable to which AGC servo-cylinders dynamic and static characteristic are surveyed
Test system can dynamically change the test of test system rigidity, and the test system includes：AGC servo-cylinders loading system, hydraulic pressure
Servo-drive system, signal acquisition and processing system, it is characterised in that
Described loading system includes：It is arranged at interior Load test framework 11, the hydraulic loaded damped cylinder 7 of order setting, centre
Cushion block 10, side stay plate 13, and AGC servo-cylinders 12 positioned at the bottom of middle spacer 10 etc.,
The Hydrauservo System provides power source for AGC servo-cylinders, servo-cylinder extension bar is stretched out or is retracted,
Middle spacer is carried out as loading damped cylinder to load the frictional resistance suffered by can changing test system.
According to a kind of servo-cylinder Performance Test System of stiffness variable of the present invention, it is characterised in that the loading machine
Frame is the Load test framework of enclosed, provides loading force for AGC servo-cylinders, servo-cylinder is surveyed under the operating mode with load
Examination.
According to a kind of servo-cylinder Performance Test System of stiffness variable of the present invention, it is characterised in that
The Hydrauservo System provides power source for servo-cylinder, and Hydrauservo System is by the automatically controlled signal of test system
It is transformed into the hydraulic pressure signal of Hydrauservo System, to control the adjustment of each pressure of the action and system of servo-cylinder,
The Hydrauservo System includes：Hydraulic pump 1, overflow valve 2, electrohydraulic servo valve 6, solenoid-operated proportional overflow pressure-reducing valve 5,
Solenoid-operated proportional pressure-reducing valve 3, three-position four-way electromagnetic directional valve 4,
The electric signal that signal processing system is sent is transformed into hydraulic pressure signal to control servo oil by described electrohydraulic servo valve 6
The displacement of cylinder and pressure size, are allowed to form closed-loop control system.
According to a kind of servo-cylinder Performance Test System of stiffness variable of the present invention, it is characterised in that described AGC is watched
The hydraulic pressure value that cylinder rod chamber inputs a fixation pressure is taken, the pressure size of servo-cylinder rod chamber passes through solenoid-operated proportional
Decompression overflow valve 5 is set, adjusted.
According to a kind of servo-cylinder Performance Test System of stiffness variable of the present invention, it is characterised in that described hydraulic pressure
The pressure for damping loading hydraulic cylinder enters Mobile state setting, adjustment by solenoid-operated proportional pressure-reducing valve 3, so the change of damping force size
It is also to be controlled by solenoid-operated proportional pressure-reducing valve.
According to a kind of servo-cylinder Performance Test System of stiffness variable of the present invention, it is characterised in that the hydraulic pressure resistance
The loading and unloading process of Buddhist nun's cylinder is controlled by three-position four-way electromagnetic directional valve 4, and its control signal is given by signal processing system
It is fixed,
The system pressure value of whole Hydrauservo System is adjusted by overflow valve 2, and hydraulic pump 1 provides system for system
Required pressure and flow.
According to a kind of servo-cylinder Performance Test System of stiffness variable of the present invention, it is characterised in that the signal is adopted
Collection and processing system include：Pressure sensor 8, magnetic scale 9, signal acquisition and processing system, industrial computer etc..Further, it is special
Levy be acquisition system pressure, displacement signal, signal processing system amplifies signal, computing, is then sent to hydraulic control valve
Related command signal.
The problem of in AGC servo-cylinders dynamic, static test, the present invention can be according to test AGC servo-cylinders
Specification difference change the rigidity value of cushion block so that rigidity and cylinder efficient milling train of the AGC servo-cylinders in test system
The equal stiffness of system, so as to can more reflect the real performance indications of AGC servo-cylinders, make AGC servo-cylinders static state and
The test result of dynamic property is more accurate.The achievement of the present invention, can save more testing costs for enterprise, also be enterprise
Bring significant economic benefit.
Brief description of the drawings
Fig. 1 is a kind of servo-cylinder Performance Test System schematic diagram of stiffness variable of the present invention.
In figure, 1 is hydraulic pump, and 2 be overflow valve, and 3 be solenoid-operated proportional pressure-reducing valve, and 4 be three-position four-way electromagnetic directional valve, and 5 are
Solenoid-operated proportional overflow pressure-reducing valve, 6 be electrohydraulic servo valve, and 7 is are arranged at the hydraulic loaded damped cylinder in Load test framework 11, and 8 be pressure
Force snesor, 9 be magnetic scale, and 10 be middle spacer, and 11 be Load test framework, and 12 be the AGC servos oil positioned at the bottom of middle spacer 10
Cylinder, 13 be side stay plate.
Embodiment
Embodiment
In order to further illustrate the application process of the technology of the present invention, by taking the test of the AGC servo-cylinders of a certain specification as an example,
Method of testing of the test system for the AGC servo-cylinder stiffness variables of different size is discussed in detail：
A) stiffness K of AGC servo-cylinders work rolling machine system will be tested by first collecting0；
A1) milling train obtains the integral stiffness value of work milling train before work by pressing method, takes the firm of actual rolling machine system
The half of degree as test system rigidity value：
B) in the test of AGC servo-cylinders, the effect of the inventive method middle spacer is：For the AGC of different size
Servo-cylinder carries out change, connection oil cylinder and the Load test framework of rigidity value.Middle spacer selects cylinder, and according to different size
AGC servo-cylinders select different size middle spacer, the height and diameter of cushion block will be calculated before testing；
C) stiffness K of AGC servo-cylinder test system Load test frameworks is collected1；
C1) rigidity of test system Load test framework can be drawn by the method for test, or the side for passing through theoretical calculation
Method calculate test Load test framework rigidity value be：K1=10000MN/m；
D) stiffness K of AGC servo-cylinders is calculatedh；
D1 hydraulic oil bulk modulus (pressure power P=21MPa value)) is collected：βe=15.9 × 108Pa, tests servo
The piston diameter of oil cylinder：D0=800mm；
D2 the area of AGC servo-cylinder rodless cavities) is calculated：
D3 the volume of AGC servoBcylinder rodless cavities) is calculated, the height of rodless cavity oil column is (taking servo-cylinder centre position)：
H0=0.17375m, so：
V0=AC×H0=0.5024 × 0.17375=0.087292m3 (11)
D4 the rigidity value of hydraulic cylinder) is calculated, because the bulk modulus of cylinder body is 100~150 times of hydraulic oil, here
The rigidity of hydraulic cylinder is calculated by hydraulic spring stiffness：
The rigidity value size of cushion block used is when e) calculating test：K2；
E1) determined according to the height value of Load test framework when the specification of tested AGC servo-cylinders and test；
E2) height of collection test Load test framework is：H=2.8m；
E3) height that collection AGC servo-cylinders are fully retracted is：H2=1.102m；
E4) height of calculating middle pad cushion block is：
H1=H-H2-H0=1.524m (13)
When selecting AGC servo-cylinder pistons centrally located during test；
E5) modulus of elasticity of collection cushion block is：E=206GPa；
E6 the diameter D of middle spacer) is calculated1：
It is by the rigidity value size of cushion block：
So, the rigidity for the test system being made up of AGC servo-cylinders, middle spacer and test Load test framework is：
Because making K0=Ke, so as to derive, bring data into and draw：
Derive again, bring data into and obtain：
F) in order to ensure the stiffness K of cushion block2>0, so, servo-cylinder test chassis can test work milling train it is firm
Spend K0It is less than 3000MN/m, that is, the rigidity for the milling train that works is less than 6000MN/m.
AGC servo-cylinders are tested according to scene, the technical scheme is that it is practicable, and achieve aobvious
The effect of work, can further genralrlization into the test of AGC servo-cylinder performances, popularizing application prospect is than broader.
Claims (13)
1. the servo-cylinder performance test methods of a kind of stiffness variable, it is adaptable to AGC servo-cylinders dynamic and static characteristic test
System can dynamically change the test of test system rigidity, using such a test system, and the test system mainly includes：
AGC servo-cylinders loading system, Hydrauservo System, signal acquisition and processing system, it is as follows that the method for testing includes step：
Step 1), collect the stiffness K of AGC servo-cylinders work rolling machine system to be tested0；
Step 2), when carrying out the test of AGC servo-cylinders, setting is connected between oil cylinder and test chassis, for transmitting loading
The cylindrical middle spacer of power；
Step 3), calculate the rigidity value K of middle spacer2：
D1:The diameter value of middle spacer,
E：The modulus of elasticity of middle spacer,
H1：The height of middle spacer,
π：Pi；
Step 4), collect the Load test framework stiffness K during test of AGC servo-cylinders1；
Step 5), calculate the rigidity value K of hydraulic cylinderh, because the bulk modulus of cylinder body is 100~150 times of hydraulic oil, this
In hydraulic cylinder rigidity by hydraulic spring stiffness calculate：
Wherein, βe：The hydraulic oil bulk modulus of pressure during for corresponding to test,
Ac：The area of servo-cylinder rodless cavity,
D0：The piston diameter of servo-cylinder,
V0：The volume of AGC servoBcylinder rodless cavities,
V0=AC×H0 (3)
H0：The height of rodless cavity oil column,
Step 6), the stiffness K e for obtaining the test system being made up of AGC servo-cylinders, middle spacer and test Load test framework is：
Make K0=Ke, so that, derive：
Derive again：
Thus, desired cylindrical middle spacer diameter is calculated, the test to the AGC servo-cylinders of different size is realized
When, test system variable rigidity, and the test of variation rigidity can be realized on same Load test framework.
2. the servo-cylinder performance test methods of a kind of stiffness variable as claimed in claim 1, it is characterised in that to different size
AGC oil cylinders when being tested, in order to ensure the stiffness K of middle spacer2>0, so servo-cylinder test chassis can be tested
The rigidity of work milling train need to be in a range in stiffness, i.e. AGC servo-cylinders work the stiffness K of rolling machine system0<Loading machine
Frame stiffness K1。
3. the servo-cylinder performance test methods of a kind of stiffness variable as claimed in claim 1, it is characterised in that for difference
The AGC servo-cylinders of specification, it is described during rigidity value to change test system by the middle spacer from different-stiffness value
Middle spacer is shaped as cylinder.
4. a kind of servo-cylinder performance test methods of stiffness variable as claimed in claim 1, it is characterised in that the K0It is worth and is
The half of the rigidity value of real work rolling machine system.
5. the servo-cylinder performance test methods of a kind of stiffness variable as claimed in claim 1, it is characterised in that the AGC is watched
Take the rigidity value K for testing Load test framework during oil cylinder test1, it can before testing test and draw, or the side for passing through theoretical calculation
Method is calculated and obtained.
6. the servo-cylinder performance test methods of a kind of stiffness variable as claimed in claim 1, it is characterised in that calculating test
The rigidity value K of middle spacer used in system2When,
The height H of middle spacer is determined according to the height value of Load test framework when the specification of tested AGC servo-cylinders and test1；
H1=H-H2-H0 (7)
Wherein, H is the height of test Load test framework,
H2The height being fully retracted for AGC servo-cylinders,
H0：The height of rodless cavity oil column.
7. the servo-cylinder Performance Test System of a kind of stiffness variable, it is adaptable to AGC servo-cylinders dynamic and static characteristic test
System can dynamically change the test of test system rigidity, and the test system includes：AGC servo-cylinders loading system, hydraulic pressure are watched
Dress system, signal acquisition and processing system, it is characterised in that
Described loading system includes：Hydraulic loaded damped cylinder 7, the middle spacer be arranged in Load test framework 11, sequentially set
10th, side stay plate 13, and the AGC servo-cylinders 12 positioned at the bottom of middle spacer 10,
The Hydrauservo System provides power source for AGC servo-cylinders, servo-cylinder extension bar is stretched out or is retracted, by adding
The frictional resistance suffered by test system can be changed by carrying damped cylinder and middle spacer load.
8. a kind of servo-cylinder Performance Test System of stiffness variable as claimed in claim 7, it is characterised in that
The Load test framework is the Load test framework of enclosed, provides loading force for AGC servo-cylinders, makes servo-cylinder with load
Operating mode under tested.
9. a kind of servo-cylinder Performance Test System of stiffness variable as claimed in claim 7, it is characterised in that
The Hydrauservo System provides power source for servo-cylinder, and Hydrauservo System changes the automatically controlled signal of test system
Into the hydraulic pressure signal of Hydrauservo System, to control the adjustment of each pressure of the action and system of servo-cylinder,
The Hydrauservo System includes：Hydraulic pump 1, overflow valve 2, electrohydraulic servo valve 6, solenoid-operated proportional overflow pressure-reducing valve 5, electromagnetism
Proportional pressure-reducing valve 3, three-position four-way electromagnetic directional valve 4,
The electric signal that signal processing system is sent is transformed into hydraulic pressure signal to control servo-cylinder by described electrohydraulic servo valve 6
Displacement and pressure size, are allowed to form closed-loop control system.
10. a kind of servo-cylinder Performance Test System of stiffness variable as claimed in claim 7, it is characterised in that described AGC
Servo-cylinder rod chamber inputs the hydraulic pressure value of a fixation pressure, and the pressure size of servo-cylinder rod chamber passes through electromagnetism ratio
Example decompression overflow valve 5 is set, adjusted.
11. a kind of servo-cylinder Performance Test System of stiffness variable as claimed in claim 7, it is characterised in that described liquid
The pressure of pressure drag Buddhist nun's loading hydraulic cylinder by solenoid-operated proportional pressure-reducing valve 3 enter Mobile state set, adjustment, so damping force size changes
Change is also to be controlled by solenoid-operated proportional pressure-reducing valve.
12. a kind of servo-cylinder Performance Test System of stiffness variable as claimed in claim 7, it is characterised in that the hydraulic pressure
The loading and unloading process of damped cylinder is controlled by three-position four-way electromagnetic directional valve 4, and its control signal passes through signal processing system
It is given,
The system pressure value of whole Hydrauservo System is adjusted by overflow valve 2, and hydraulic pump 1 provides system institute for system
The pressure and flow needed.
13. a kind of servo-cylinder Performance Test System of stiffness variable as claimed in claim 7, it is characterised in that the signal
Collection and processing system include：Pressure sensor 8, magnetic scale 9, signal acquisition and processing system, industrial computer etc..Further, its
It is characterized in pressure, the displacement signal of acquisition system, signal processing system amplifies signal, computing, is then sent out to hydraulic control valve
Go out the command signal of correlation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288953A (en) * | 2016-03-31 | 2017-10-24 | 宝山钢铁股份有限公司 | The servo-cylinder performance test methods and its test system of a kind of adaptive damping |
| CN107725534A (en) * | 2017-11-08 | 2018-02-23 | 南京工程学院 | A kind of adjustable load hydraulic loaded experimental system of axial load |
| CN110513359A (en) * | 2019-09-23 | 2019-11-29 | 湖南科技大学 | Continuously variable transmission test bed and continuously variable transmission test method |
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| CN107725534A (en) * | 2017-11-08 | 2018-02-23 | 南京工程学院 | A kind of adjustable load hydraulic loaded experimental system of axial load |
| CN107725534B (en) * | 2017-11-08 | 2019-06-04 | 南京工程学院 | A kind of load hydraulic loaded experimental system that axial load is adjustable |
| CN110513359A (en) * | 2019-09-23 | 2019-11-29 | 湖南科技大学 | Continuously variable transmission test bed and continuously variable transmission test method |
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