CN105605032B - A kind of servo valve dynamic pressure feedback test dynamic loading device - Google Patents
A kind of servo valve dynamic pressure feedback test dynamic loading device Download PDFInfo
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- CN105605032B CN105605032B CN201410599095.3A CN201410599095A CN105605032B CN 105605032 B CN105605032 B CN 105605032B CN 201410599095 A CN201410599095 A CN 201410599095A CN 105605032 B CN105605032 B CN 105605032B
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Abstract
The invention belongs to aerospace servo valve testing fields, more particularly to a kind of servo valve dynamic pressure feedback test dynamic loading device, it includes dynamic load cylinder, displacement sensor, velocity sensor, pressure sensor, load servo valve, tested servo valve and dynamic pressure feedback tester；It is equipped with piston rod in dynamic load cylinder, piston is equipped among piston rod, piston rod, piston and the dynamic load inside wall of cylinder form four cavitys.The dynamic load cylinder that the present invention is designed by four vessels, and installation speed sensor, displacement sensor and pressure sensor are distinguished on four vessels of cylinder body, the load of load pressure difference and status detection function can be achieved at the same time；The stabilization for keeping load pressure difference using the closed-loop control of servo loading dynamic fluid flow cylinder pressure simultaneously, improves the efficiency and precision of dynamic pressure feedback test, provides safeguard for the production of dynamic pressure feedback servo valve.
Description
Technical field
The invention belongs to aerospace servo valve testing fields, and in particular to a kind of servo valve dynamic pressure feedback test dynamic
Loading device.
Background technology
The thrust vectoring servo-control system of carrier rocket makes system damping that phase be arranged often due to pursuing quick response
To smaller, and the inertia of controlled device, that is, engine is very big so that servo-drive system resonance occurs in lower Frequency point to be caused to control
System unstability processed is an effectively solution using dynamic pressure feedback servo valve.
Servo valve dynamic pressure feedback device can effectively improve system damping in dynamic, improve dynamic property, and can be
The rigidity that system is kept when stable state, makes system have good anti-loading interference performance.Dynamic pressure feedback performance includes feedback pressure difference
Characteristic and feedback flow graded effect.Feedback differential pressure characteristics refer to feeding back the frequency spy of two chamber pressure difference responsive load pressure difference of nozzle variation
Property.Feedback flow graded effect refers to the servo valve output flow fed back caused by pressure difference.
Traditional dynamic pressure feedback test method is to carry out test step by step to dynamic pressure feedback performance, is needed during the test more
Test fixture and again tuning parameter are changed, and test process relies on manual pointwise test, artificial interpretation data, the degree of automation
Low, data cover face is narrow, and test accuracy is relatively low, cannot really reflect dynamic pressure feedback characteristic completely.
Traditional dynamic pressure feedback loading device for testing is controlled with the combination of flow charge valve and fixed orifice
Pressure difference is loaded, the amplitude size for loading pressure difference is in opened loop control state, the load flow part stream of load servo valve output
The load pressure difference of tested servo valve is formed through fixed orifice, a part flows back to fuel tank through being tested the internal oil passages of servo valve.With
The increase for load signal frequency, since the effect of dynamic pressure feedback causes the increasing of tested valve core of servo valve aperture so as to cause warp
This partial discharge that tested servo valve internal oil passages return to fuel tank increases, and the flow for flowing through fixed orifice is then accordingly reduced.
Therefore, it usually requires to adjust manually to keep pressure difference to stablize, has seriously affected testing efficiency.
Invention content
The purpose of the present invention is to provide a kind of servo valve dynamic pressure feedback test dynamic loading devices, can realize to watching
The synchronism detection of valve actuation pressure feedback characteristics is taken, and improves the efficiency and precision of dynamic pressure feedback test.
Realize the technical solution of the object of the invention：
A kind of servo valve dynamic pressure feedback test dynamic loading device, it includes dynamic load cylinder, displacement sensor, speed
Sensor, pressure sensor A, pressure sensor B, pressure sensor C, pressure sensor D, load servo valve, tested servo valve
With dynamic pressure feedback tester；The left end of dynamic load cylinder is connected to the input terminal of displacement sensor, the right end of dynamic load cylinder with
The input terminal of velocity sensor is connected to, and A mouthfuls of load servo valve control for loading servo valve is connected to the input terminal of displacement sensor,
B mouthfuls of the load servo valve control of load servo valve is connected to the input terminal of velocity sensor；Load the command reception end of servo valve
It is connected to the instruction output end of dynamic pressure feedback tester；The input terminal of tested servo valve connects with the pressure output end of dynamic load cylinder
It is logical, be tested the output end of servo valve respectively with pressure sensor A, pressure sensor B, pressure sensor C, pressure sensor D
Input terminal is connected to；Displacement sensor, velocity sensor, pressure sensor A, pressure sensor B, pressure sensor C, pressure sensing
The output end of device D is connected to by data/address bus with dynamic pressure feedback tester respectively.
It is equipped with piston rod in the dynamic load cylinder, piston is equipped among piston rod；Each point of the left and right ends of piston rod
Do not form a seal cavity with the inner wall of dynamic load cylinder, each inner wall with dynamic load cylinder respectively of the left and right sides of piston
Form a seal cavity；The left end of piston rod is connected to the input terminal of displacement sensor, piston rod right end and velocity sensor
Input terminal connection, the left side of piston is connected to the input terminal of pressure sensor A, the right side of piston and pressure sensor B
Input terminal connection.
The area ratio of the piston and piston rod is 2~3.
The tested servo valve includes the first feedback nozzle, the second feedback nozzle, is tested A mouthfuls of servo valve load, is tested
Servo valve loads B mouthfuls, tested servo valve oil-feed port, is tested servo valve oil return opening；Tested servo valve oil-feed port and load servo valve
Oil-feed port is connected to, and tested servo valve loads A mouthfuls and is connected to the input terminal of pressure sensor A, is tested servo valve and is loaded B mouthfuls and pressure
The input terminal of sensor B is connected to；The input terminal of first feedback nozzle loads A mouthfuls with tested servo valve and is connected to, the first feedback nozzle
Output end be connected to the input terminal of pressure sensor C；The input terminal of second feedback nozzle loads B mouthfuls even with tested servo valve
Logical, the output end of the second feedback nozzle is connected to the input terminal of pressure sensor D.
The displacement signal of the displacement sensor detection piston is prevented using the position-force control with low-pass filtering
Piston hits cylinder.
The beneficial technical effect of the present invention lies in：
(1) a kind of servo valve dynamic pressure feedback test dynamic loading device provided by the present invention is designed using four vessels
Dynamic load cylinder, and on four vessels of cylinder body distinguish installation speed sensor, displacement sensor and pressure sensor, can
The load of load pressure difference and status detection function are realized simultaneously；
(2) present invention keeps the stabilization of load pressure difference using the closed-loop control of servo loading dynamic fluid flow cylinder pressure, and can be
The data such as dynamic data and the load pressure difference of subject servo valve output loading flow are obtained in entire test process, are realized to dynamic pressure
The synchronism detection of feedback characteristics carries to improve the efficiency and precision of dynamic pressure feedback test for the production of dynamic pressure feedback servo valve
For ensureing.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of servo valve dynamic pressure feedback test dynamic loading device provided by the present invention；
Fig. 2 is the effective cross-section schematic diagram of dynamic load cylinder.
In figure：1. dynamic load cylinder, 1A. piston rods, 1B. pistons, the effective cross-section of 1C. dynamic load cylinders, 2. displacements pass
Sensor, 3. velocity sensors, 4. pressure sensor A, 5. pressure sensor B, 6. pressure sensor C, 7. pressure sensor D, 8.
Load servo valve, 8P. load servo valves oil-feed port, 8T. load servo valves oil return opening, A mouthfuls of servo valve control of 8A. loads, 8B. add
B mouthfuls of servo valve control is carried, it is negative that 9. tested servo valves, 9C. first feed back nozzle, 9D. second feeds back nozzle, 9A. is tested servo valve
Carry A mouthfuls, 9B. is tested B mouthfuls of servo valve load, 9P. is tested servo valve oil-feed port, 9T. is tested servo valve oil return opening, 10. dynamic pressures are anti-
Present tester.
Specific implementation mode
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of servo valve dynamic pressure feedback test dynamic loading device provided by the present invention, including dynamic
Cylinder 1, displacement sensor 2, velocity sensor 3, pressure sensor A4, pressure sensor B5, pressure sensor C6, pressure is loaded to pass
Sensor D7, load servo valve 8, tested servo valve 9 and dynamic pressure feedback tester 10.
Piston 1B there are one being set among piston rod 1A there are one being set in dynamic load cylinder 1, piston rod 1A.A left side of piston rod 1A
Right both ends respectively form a seal cavity with the inner wall of dynamic load cylinder 1 respectively, the left and right sides of piston 1B respectively respectively with it is dynamic
The inner wall that state loads cylinder 1 forms a seal cavity.The left end of piston rod 1A is connected to the input terminal of displacement sensor 2, piston
Bar 1A right ends are connected to the input terminal of velocity sensor 3, and the left side of piston 1B is connected to the input terminal of pressure sensor A4, living
The right side of plug 1B is connected to the input terminal of pressure sensor B5.Displacement sensor 2, velocity sensor 3, pressure sensor A4,
The output end of pressure sensor B5 is connected to by data/address bus with dynamic pressure feedback tester 10 respectively.In order to obtain more actually by
The characteristic for surveying servo valve 9, needs to design larger piston-cylinder rod area ratio.In order to improve the load energy of dynamic load cylinder 1
Power needs smaller piston-cylinder rod area ratio.Through overtesting, confirm the area ratio of piston rod between 2~3.
In the present embodiment, the circular diameter of piston is 160mm, and the circular diameter of piston rod is 100mm, and the stroke of piston is 20mm.Piston-work
Stopper rod area ratio is 2.56.
Velocity sensor 3 is used for detecting the speed signal of piston 1B.Displacement sensor 2 is used for detecting the displacement letter of piston 1B
Number, it is using the position-force control with low-pass filtering in dynamic pressure feedback tester 10, the offset signal of displacement sensor 2 is anti-
It is fed to the command reception end of load servo valve 8, as the deviation correcting signal of piston 1B, to prevent piston 1B from hitting cylinder.
It includes load servo valve oil-feed port 8P, load servo valve oil return opening 8T, load servo valve control A to load servo valve 8
Mouth 8A, load B mouthfuls of 8B of servo valve control, load A mouthfuls of 8A of servo valve control are connected to the input terminal of displacement sensor 2, and load is watched
B mouthfuls of 8B of valve control are taken to be connected to the input terminal of velocity sensor 3.Load servo valve oil-feed port 8P provide hydraulic oil for equipment, adds
It carries servo valve oil return opening 8T to be connected to external oil groove, flows out hydraulic oil.The command reception end and dynamic pressure feedback for loading servo valve 8 are surveyed
Try the instruction output end connection of instrument 10.
Tested servo valve 9 loads A mouthfuls of 9A including the first feedback nozzle 9C, the second feedback nozzle 9D, tested servo valve, is tested
Servo valve loads B mouthfuls of 9B, tested servo valve oil-feed port 9P, tested servo valve oil return opening 9T.It is tested servo valve oil-feed port 9P and adds
The 8P connections of servo valve oil-feed port are carried, tested servo valve oil return opening 9T is connected to load servo valve oil return opening 8T.Tested servo valve is negative
It carries A mouthfuls of 9A to be connected to the input terminal of pressure sensor A4, is tested the input terminal company that servo valve loads B mouthfuls of 9B and pressure sensor B5
It is logical.The input terminal of first feedback nozzle 9C loads A mouthfuls of 9A with tested servo valve and is connected to, the output end and pressure of the first feedback nozzle 9C
The input terminal of force snesor C6 is connected to.The input terminal of second feedback nozzle 9D loads B mouthfuls of 9B with tested servo valve and is connected to, and second is anti-
The output end of feedback nozzle 9D is connected to the input terminal of pressure sensor D6.The output end of pressure sensor C6, pressure sensor D7
It is connected to respectively with dynamic pressure feedback tester 10 by data/address bus.
The present invention the course of work be：
(1) control instruction signal is sent out from dynamic pressure feedback tester 10 to load servo valve 8, load servo valve 8 exports
Control pressure difference acts on the both ends piston rod 1A by loading servo valve control A mouthfuls of 8A, loading B mouthfuls of 8B of servo valve control, and then makes
Obtain the load pressure difference that the both sides piston 1B form tested servo valve 9.Pressure sensor A4, pressure sensor B5 can detect tested in real time
The load pressure difference of servo valve 9, and the load pressure difference of tested servo valve 9 is exported to dynamic pressure feedback tester 10.Dynamic pressure feedback is surveyed
Instrument 10 is tried by comparing the load pressure difference of the instruction pressure difference and actual measurement of control instruction signal, is protected with the mode that pressure closed loop controls
The stabilization of card load pressure difference.
(2) dynamic pressure feedback tester 10 carries out dynamic pressure feedback performance survey according to preset load pressure difference amplitude and frequency range
Examination.Dynamic pressure feedback performance test includes feedback pressure difference characteristic test and the test of feedback flow graded effect.
(2.1) pressure difference characteristic test is fed back
Feedback differential pressure characteristics refer to the feedback pressure difference P between the feedback nozzles of the first feedback nozzle 9C and second 9DFResponse is negative
Carry pressure difference PLThe frequency characteristic of variation.Feed back pressure difference PFIt is obtained by pressure sensor C6, pressure sensor D7, and defeated respectively
Go out to dynamic pressure feedback tester 10.
(2.2) feedback flow graded effect is tested
Feedback flow refers to feedback pressure difference PFCaused tested servo valve output flow Q.
Tested servo valve output flow Q can be obtained by formula Q=A*V,
Wherein A is the area of the effective cross-section 1C of dynamic load cylinder shown in Fig. 2, i.e. the maximum circular section of piston 1B subtracts
Remove the obtained area in maximum circular section of piston rod 1A；V is the movement speed of 1 inner carrier 1B of dynamic load cylinder, can pass through speed
Sensor 3 is spent to obtain, and is exported to dynamic pressure feedback tester 10.
In entire test process, tested servo valve output flow Q, load pressure difference P can be obtained in real timeLWith feedback pressure difference PF
Etc. data, realize to the synchronism detections of two kinds of projects of dynamic pressure feedback characteristic, to improve the efficiency and precision of dynamic pressure feedback test,
Production for dynamic pressure feedback servo valve provides safeguard.
The present invention is explained in detail above in conjunction with drawings and examples, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present invention
Go out various change.The prior art may be used in the content not being described in detail in the present invention.
Claims (4)
1. a kind of servo valve dynamic pressure feedback test dynamic loading device, it is characterised in that：It includes dynamic load cylinder (1), position
Displacement sensor (2), velocity sensor (3), pressure sensor A (4), pressure sensor B (5), pressure sensor C (6), pressure pass
Sensor D (7), load servo valve (8), tested servo valve (9) and dynamic pressure feedback tester (10)；
It is equipped with piston rod (1A) in the dynamic load cylinder (1), piston (1B) is equipped among piston rod (1A)；Piston rod (1A)
Left and right ends respectively form a seal cavity with the inner wall of dynamic load cylinder (1) respectively, the left and right sides of piston (1B) are each
Respectively a seal cavity is formed with the inner wall of dynamic load cylinder (1)；Load A mouthfuls of the load servo valve control of servo valve (8)
(8A) is connected to the input terminal of the seal cavity of dynamic load cylinder piston rod left end, the load servo valve control of load servo valve (8)
(8B) B mouthfuls processed is connected to the input terminal of the seal cavity of dynamic load cylinder piston rod right end, is tested the tested servo of servo valve (9)
Valve load A mouthfuls (9A) is connected to the output end of the seal cavity on the left of dynamic load the cylinder piston, is tested tested the watching of servo valve (9)
Valve load B mouthfuls (9B) is taken to be connected to the output end of the seal cavity on the right side of dynamic load the cylinder piston；
The command reception end of load servo valve (8) is connected to the instruction output end of dynamic pressure feedback tester (10)；Dynamic load cylinder
Seal cavity on the left of piston is connected to the input terminal of pressure sensor A (4), the seal cavity on the right side of dynamic load the cylinder piston with
The input terminal of pressure sensor B (5) is connected to；Displacement sensor (2) is used to detect the displacement signal of piston (1B), velocity sensor
(3) it is used to detect the speed signal of piston (1B)；
Tested servo valve (9) respectively with pressure sensor A (4), pressure sensor B (5), pressure sensor C (6), pressure sensing
The input terminal of device D (7) is connected to；Displacement sensor (2), velocity sensor (3), pressure sensor A (4), pressure sensor B (5),
Pressure sensor C (6), pressure sensor D (7) output end pass through data/address bus and dynamic pressure feedback tester (10) respectively even
It is logical.
2. a kind of servo valve dynamic pressure feedback test dynamic loading device according to claim 1, it is characterised in that：It is described
The area ratio of piston (1B) and piston rod (1A) be 2~3.
3. a kind of servo valve dynamic pressure feedback test dynamic loading device according to claim 2, it is characterised in that：It is described
Tested servo valve (9) include that the first feedback nozzle (9C), the second feedback nozzle (9D), tested servo valve load A mouthfuls of (9A), quilts
Survey servo valve load B mouthfuls (9B), tested servo valve oil-feed port (9P), tested servo valve oil return opening (9T)；Tested servo valve fuel feeding
Mouth (9P) is connected to load servo valve oil-feed port (8P), is tested the input that servo valve loads A mouthfuls of (9A) and pressure sensor A (4)
End connection, tested servo valve load B mouthfuls (9B) are connected to the input terminal of pressure sensor B (5)；First feeds back the defeated of nozzle (9C)
Enter end to be connected to tested servo valve load A mouthfuls (9A), first feeds back the defeated of output end and the pressure sensor C (6) of nozzle (9C)
Enter end connection；The input terminal of second feedback nozzle (9D) is connected to tested servo valve load B mouthfuls (9B), the second feedback nozzle (9D)
Output end be connected to the input terminal of pressure sensor D (6).
4. a kind of servo valve dynamic pressure feedback test dynamic loading device according to claim 3, it is characterised in that：It is described
Displacement sensor (2) detection piston (1B) displacement signal prevent piston using the position-force control with low-pass filtering
(1B) hits cylinder.
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| CN201410599095.3A CN105605032B (en) | 2014-10-30 | 2014-10-30 | A kind of servo valve dynamic pressure feedback test dynamic loading device |
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| CN201410599095.3A CN105605032B (en) | 2014-10-30 | 2014-10-30 | A kind of servo valve dynamic pressure feedback test dynamic loading device |
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| CN106089857B (en) * | 2016-06-20 | 2018-03-02 | 北京交通大学 | The test system and test method of the dynamic pressure feedback effect frequency characteristic of servo valve |
| CN106089856A (en) * | 2016-06-20 | 2016-11-09 | 北京交通大学 | The automatization test system of the dynamic pressure feedback characteristic of servo valve |
| CN105909596A (en) * | 2016-06-21 | 2016-08-31 | 北京交通大学 | Dynamic pressure feedback pressure difference characteristic test system and test method |
| CN105909597B (en) * | 2016-06-21 | 2017-09-29 | 北京交通大学 | Dynamic pressure feedback pressure difference-quiescent flow characteristic test system and test method |
| CN106959198A (en) * | 2017-05-26 | 2017-07-18 | 北京航空航天大学 | A kind of shock loading analogue means |
| CN107524649A (en) * | 2017-10-25 | 2017-12-29 | 北京富力通达科技有限公司 | The device and control method that a kind of hydraulic servo oil cylinder synchronously loads |
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| JPS61201978A (en) * | 1985-03-04 | 1986-09-06 | Mitsubishi Heavy Ind Ltd | Dynamic test method for electro-hydraulic governor for steam turbine |
| CN2083741U (en) * | 1990-01-20 | 1991-08-28 | 山西矿业学院 | Dynamic property tester for hydraulic support safety valve |
| EP1452937B1 (en) * | 1997-07-23 | 2006-03-22 | Dresser, Inc. | Valve positioner system |
| US6678584B2 (en) * | 2002-05-03 | 2004-01-13 | Fisher Controls International Llc | Method and apparatus for performing diagnostics in a control loop of a control valve |
| CN102966627A (en) * | 2011-08-31 | 2013-03-13 | 常州天泰矿山设备制造有限公司 | Ultrahigh-pressure large-flow stand column hydraulic part test bench |
| CN203655789U (en) * | 2014-01-09 | 2014-06-18 | 浙江大学 | Testing system of pilot load control valve |
| CN203784021U (en) * | 2014-04-28 | 2014-08-20 | 泸州沱江液压件有限公司 | Multifunctional comprehensive hydraulic experiment device |
| CN104088856A (en) * | 2014-06-26 | 2014-10-08 | 南京梅山冶金发展有限公司 | Servo valve detecting device and method |
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