CN108087382B - A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method - Google Patents
A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method Download PDFInfo
- Publication number
- CN108087382B CN108087382B CN201711234626.9A CN201711234626A CN108087382B CN 108087382 B CN108087382 B CN 108087382B CN 201711234626 A CN201711234626 A CN 201711234626A CN 108087382 B CN108087382 B CN 108087382B
- Authority
- CN
- China
- Prior art keywords
- test
- electrohydraudic servomechanism
- test specimen
- stage
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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 Dual-energy source electrohydraudic servomechanism reliability growth test system and method, is mainly used for the reliability growth test of electrohydraudic servomechanism.Design portable load cylinder assembly and load pump, subject product can complete reliability growth test under the synthesized stress environments such as temperature, vibration, electricity, pressure, load, it loads cylinder and realizes positive, Opposite side loading according to different demands, also it can realize and link with by test specimen, loading force is internal force, is not transferred to shake table and temperature and humidity case.During test, is realized according to different needs by the free switching of the test specimen electrohydraudic servomechanism electric-motor pump energy and ground pump station, the autonomous working of each energy is realized by check valve, the unlatching of hydraulic control one-way valve, closing.Using three-stage test method, the latter half makes full use of the test data of previous stage, and total testing time is shortened compared with not being segmented.
Description
Technical field
The present invention relates to reliability growth test technology, specifically electrohydraudic servomechanism reliability growth test is answered entirely
Power combined reliability growth test system and method.
Background technique
Reliability growth test is the development that product reliability is increased to acceptable level, and test is lacked with exposure
For the purpose of falling into, it is the repetitive process that test-analysis-improvement-is tested again, and product is made to be finally reached reliability requirement.
The design relation of electrohydraudic servomechanism stress profile the accuracy and authenticity of reliability growth test result, when
When product is faced with a variety of working stresses, the common practice of technology is carried out under no-load condition using environment comprehensive chamber at present
Temperature and humidity, vibration environment reliability growth test, have ignored the application of load stress.
Electrohydraudic servomechanism can work under the conditions of two sets of independent energy resource systems, general reliability growth test be by
The two, which is kept apart, individually carries out reliability growth test, has ignored the linking of the two in the course of work.
Common reliability growth model includes Duane model of growth, AMSAA model etc., for some complex products, such as
The joint product of the technologies such as machinery, electronics, hydraulic, pneumatic cannot apply intrinsic reliability growth model.
Summary of the invention
The present invention proposes a kind of reliability growth test system and method, effectively for deficiency existing for existing method
Ground solves the problems, such as the reliability growth test of the electrohydraudic servomechanism of the complex techniques such as mechanical, electrical, liquid, gas, including load stress
Application problem synchronous with environmental stress, the switching problem of Dual-energy source, test period design problem.
The object of the invention is achieved by the following technical programs:
A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system, comprising: shake table, vibration tool, temperature and humidity
Case, chuck, long spiro nail, pin shaft, load cylinder, flexible hoist cable, power module, test suite and charging assembly；
Vibration tool is housed, temperature and humidity case is by ground supports, and there are confessions for temperature and humidity case bottom center on shake table
The opening that vibration tool passes through, the fixed flexible hoist cable in temperature and humidity box top, the one end for loading cylinder passes through flexible hoist cable suspention, another
End is connect by long spiro nail with chuck, and chuck is installed on by test specimen electrohydraudic servomechanism, and load cylinder also passes through pin shaft and subject
The connection of part electrohydraudic servomechanism；It is connect by the bottom of test specimen electrohydraudic servomechanism with vibration tool；
Power module is connect with by test specimen electrohydraudic servomechanism, for providing by the work energy of test specimen electrohydraudic servomechanism
Source, driving are worked by test specimen electrohydraudic servomechanism；
Charging assembly is connect with load cylinder, for providing the hydraulic coupling of load cylinder, the liquid that load cylinder is provided in charging assembly
Pressure effect is lower to export loading force；
Test suite is connect with by test specimen electrohydraudic servomechanism, is powered and is surveyed by test specimen electrohydraudic servomechanism for giving
Examination.
The power module includes: ground pump station, check valve, hydraulic control one-way valve, low-pressure hose and high-pressure hose；
The low pressure hydraulic fluid port and high pressure oil port of ground pump station pass through low-pressure hose and high-pressure hose respectively and are watched by test specimen is electro-hydraulic
Mechanism connection is taken, ground pump station high pressure oil port is equipped with check valve, for controlling hydraulic oil one-way flow in high-pressure hose, ground
When pumping plant starts, check valve is opened under the effect of its high pressure, and high-pressure oil flow to by test specimen electrohydraudic servomechanism, close by ground pump station
When, check valve is in off state, prevents to flow to ground pump station by test specimen electrohydraudic servomechanism oil liquid；
Low pressure hydraulic fluid port passes through introducing for controlling one-way flow of the hydraulic oil in low-pressure hose equipped with hydraulic control one-way valve
The oil liquid of ground pump station high pressure oil port is controlled, and when ground pump station starts, hydraulic control one-way valve is opened, and oil stream is by electro-hydraulic by test specimen
Servo mechanism flows to ground pump station, forms way to cycle oil, and when ground pump station is closed, hydraulic control one-way valve is closed, and prevents by test specimen electricity
Liquid servo mechanism oil liquid flows to ground pump station；The cracking pressure of check valve is lower than the cracking pressure of hydraulic control one-way valve.
The charging assembly includes the first load pumping plant hose, the second load pumping plant hose and load pumping plant；
Load pumping plant is connect by the first load pumping plant hose and the second load pumping plant hose with load cylinder, is mentioned to load cylinder
Liquid supply pressure is switched by internal valves and realizes biaxial loadings, when only the first load pumping plant hose is passed through high pressure oil, is realized just
To load, the low pressure oil loaded in cylinder returns load pumping plant by the second load pumping plant hose；When only the second load pumping plant hose is logical
When entering high pressure oil, Opposite side loading is realized, the low pressure oil loaded in cylinder returns load pumping plant by the first load pumping plant hose.
The test suite includes: intermediate frequency power supply, service cable, servo mechanism test instrument and control cable；
Servo mechanism test instrument is connect by control cable with by test specimen electrohydraudic servomechanism, for being watched by test specimen is electro-hydraulic
It takes mechanism to be tested, intermediate frequency power supply is given by service cable and powered by test specimen electrohydraudic servomechanism.
Loading cylinder includes load cylinder cylinder body and load cylinder piston rod；The top for loading cylinder housing is connect with flexible hoist cable, is added
The lower part for carrying cylinder housing is connect with long spiro nail, and load cylinder piston rod is located at the centre of load cylinder cylinder body, loads cylinder piston rod
Lower end connect by pin shaft with by test specimen electrohydraudic servomechanism.
There is step at the long spiro nail both ends, and the piston rod to limit load cylinder passes through with by test specimen electrohydraudic servomechanism
Distance when pin shaft connects.
The direction of vibration of shake table is total to perpendicular to ground by the axis of test specimen electrohydraudic servomechanism and the axis of load cylinder
Line, and it is consistent with the direction of vibration of shake table.
It include shell, piston rod, fuel tank and electric-motor pump by test specimen electrohydraudic servomechanism, by test specimen electrohydraudic servomechanism two
It works under the kind energy: first is that fuel tank stores oil liquid by test specimen electrohydraudic servomechanism by included motor pump startup work, second is that by
Test specimen electrohydraudic servomechanism works under ground pump station driving；
It is real by check valve and hydraulic control one-way valve by the electric-motor pump of test specimen electrohydraudic servomechanism and ground pump station free switching
Existing electric-motor pump and ground pump station be isolated and holding, the open and close of check valve and hydraulic control one-way valve is controlled, to electro-hydraulic by test specimen
The fuel tank of servo mechanism carries out oil-filled.
A kind of Dual-energy source electrohydraudic servomechanism Reliability Growth Test Method, steps are as follows:
Step 1: reliability growth test is divided into three phases, the target value in each stage, the target of phase III are set
Value is test catalogue scale value；
Step 2: setting first stage test sample number n1, the Censoring timet0For task
Time；For first stage target value；M is form parameter, and α is confidence parameter；
Step 3: carrying out first stage test；
Step 4: statistics first stage test data, including the first stage failure sample number, failure the sampling test time and
Reach the sample number of Censoring time；
Step 5: setting second stage test sample number n2, Censoring time T2=inf { T >=t0: R2L(Z1, T+..., T+) >=R20, Z1 are that first stage test data (comprising first stage failure sample number, the failure sampling test time, reaches
To the sample number of Censoring time) and Censoring time first stage set；R2LFor second stage reliability R2Set
Believe lower limit；T+For second stage truncated time (total n2It is a) (assuming that no-failure),For second stage target value；
Step 6: carrying out second stage test；
Step 7: statistics second stage test data, including second stage failure sample number, failure the sampling test time and
Reach the sample number of Censoring time；
Step 8: setting phase III test sample number n3, the Censoring time
Z2For the first and second step-by-step test data (comprising first,
Second order segment fault sample number, failure sampling test time, the sample number for reaching the Censoring time) and the timing of the first and second stage
The set of truncated time；R3LFor phase III reliability R3Confidence lower limit；T+For phase III truncated time (total n3It is a) it is (false
If no-failure),For phase III target value；
Step 9: carrying out phase III test；
Step 10: the first, second and third step-by-step test data of statistics, refer to the first, second and third stage failure sample number, failure sample
This test period and the sample number for reaching the Censoring time.
The first stage test, second stage test, phase III test carry out as follows:
(1) 0min, start-up loading pumping plant, temperature and humidity case start to cool down, while starting servo mechanism test instrument；
(2) 30min, temperature and humidity case is cooled to -20 DEG C, and enters keeping warm mode；
(3) 150min, the heat preservation of temperature and humidity case terminate, and temperature and humidity case starts to warm up；Start intermediate frequency power supply simultaneously, by test specimen electricity
After liquid servo mechanism obtains power supply, by motor pump work, working fluid comes from fuel tank, operating pressure 17MPa；
(4) 160min closes intermediate frequency power supply, and motor pump work terminates, and the starting that is powered terminates, and starts ground pump station, subject
Part electrohydraudic servomechanism enters drainage working condition, operating pressure 27MPa, while opening shake table, applies vibration environment stress,
Temperature and humidity case heating simultaneously starts；
(5) 180min is continued to work under drainage state by test specimen electrohydraudic servomechanism, and shake table works on, warm and humid
Degree case is warming up to 60 DEG C, and enters keeping warm mode；
(6) 190min closes shake table, reduces ground pump station pressure to check valve unlatching, hydraulic control one-way valve and closes range,
It is monitored by servo mechanism test instrument by test specimen electrohydraudic servomechanism oil tank liquid level, ground pump station is closed after meeting the requirements, completed
Oil feeding process；
(7) 240min, soak terminate, and a circulation terminates.
The present invention has the following beneficial effects: compared with the prior art
1) temperature, vibration, electricity, pressure, load iso-stress can be applied during present invention test by the stress profile of setting
Value.Hydraulic load load cylinder can be realized positive, negative sense load, is also able to achieve and links with by test specimen, loading force is internal force, will not
It is transmitted to shake table and temperature and humidity case；
2) present invention is able to achieve included electric-motor pump and the ground pump station energy by test specimen electrohydraudic servomechanism during the test
Dual-energy source switching, improve the adequacy and validity of test.
3) present invention uses three-stage test method, and the latter half makes full use of the test data of previous stage, with regardless of
Section, which compares, shortens total testing time.
4) present system and test method are at low cost, can sufficiently verify the comprehensive performance of product, load cylinder, load pumping plant
System is suitble to the load test in the combined test chamber of all kinds of piston output type hydraulic servomechanisms, and Dual-energy source automatically switches design
It is suitble to the hydraulic servomechanism class product that all kinds of self energy component calorific values are big, the working time is short.The reliability of its segmented
Growth test method is suitble to the electromechanical integrated product of all kinds of Weibull Distributed Units.
Detailed description of the invention
Below with reference to attached drawing and implementation, the invention will be further described.
Fig. 1 is electrohydraudic servomechanism reliability growth test schematic diagram of the present invention；
Fig. 2 is the present invention by test specimen electrohydraudic servomechanism schematic diagram；
Fig. 3 is present invention load cylinder schematic diagram；
Fig. 4 is three stage reliability growth test flow charts of the invention；
Fig. 5 is reliability test stress sectional drawing of the present invention；
In figure, 1-shake table, 2-vibration tools, 3-temperature and humidity casees, 4-by test specimen electrohydraudic servomechanism, 5-chucks,
6-long spiro nails, 7-pin shafts, 8-load cylinders, 9-flexible hoist cables, 10-ground pump stations, 11-check valves, 12-fluid-control one-ways
Valve, 13-ground pump station low-pressure hoses, 14-ground pump station high-pressure hoses, 15-intermediate frequency power supplies, 16-service cables, 17-watch
Mechanism tester is taken, 18: control cable, 19,20-load pumping plant hoses, 21-load pumping plants.
401-by test specimen electrohydraudic servomechanism shell, and 402-by test specimen electrohydraudic servomechanism piston rod, and 403-by test specimen
Electrohydraudic servomechanism fuel tank, 404-are lived by test specimen electrohydraudic servomechanism electric-motor pump, 801-load cylinder cylinder bodies, 802-load cylinders
Stopper rod.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to implementation of the invention
Mode is described in further detail.
The invention proposes a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and methods, devise portable
Formula loads cylinder assembly and load pump, and subject product can complete reliability growth test under compbined test environment, loads cylinder root
Positive, Opposite side loading is realized according to different demands, can also be realized and be linked with by test specimen.Card slot is designed in subject product, by chuck,
Long spiro nail is connect with load cylinder, is connect with load cylinder piston rod by pin shaft by test specimen piston rod.
During test, need to realize by oneself of the test specimen electrohydraudic servomechanism electric-motor pump energy and ground pump station according to different
By switching, the autonomous working of each energy is realized by check valve, the unlatching of hydraulic control one-way valve, closing.Subject product can be by certainly
The band energy and ground pump station alternately start, sufficiently progress certification test, and when ground pump station starts, check valve, hydraulic control one-way valve exist
It automatically turns under pressure, is shut down the shut-in time of pressure control one-way valve and hydraulic control one-way valve by ground pump station, guarantee subject
Certain oil liquid is filled in product fuel tank, in case subject product uses when carrying the starting of the electric-motor pump energy.When included energy starting,
Check valve, hydraulic control one-way valve are closed, and realization is isolated with ground pump station.
The characteristics of obeying Weibull distribution according to mechanical, electrical, liquid, gas integral life of product, using three-stage test method,
The latter half test period makes full use of the data of previous stage when determining, substantially reduce total time on test.
Fig. 1 is electrohydraudic servomechanism reliability growth test system schematic of the present invention, shake table 1, vibration tool 2, temperature
Humidity cabinet 3, chuck 5, long spiro nail 6, pin shaft 7, load cylinder 8, flexible hoist cable 9, power module, test suite and charging assembly；
Vibration tool 2 is housed, temperature and humidity case 3 is by ground supports, and 3 bottom center of temperature and humidity case is stayed on shake table 1
There is the opening passed through for vibration tool 2, fixed flexible hoist cable 9 at the top of temperature and humidity case 3, one end of load cylinder 8 passes through flexible hoist cable 9
Suspention, the other end are connect by long spiro nail 6 with chuck 5, and chuck 5 is installed on by test specimen electrohydraudic servomechanism 4, and load cylinder 8 is also
It is connect by pin shaft 7 with by test specimen electrohydraudic servomechanism 4；It is connect by the bottom of test specimen electrohydraudic servomechanism 4 with vibration tool 2；
Power module is connect with by test specimen electrohydraudic servomechanism 4, for providing by the work energy of test specimen electrohydraudic servomechanism 4
Source, driving are worked by test specimen electrohydraudic servomechanism 4；
Power module includes: ground pump station 10, check valve 11, hydraulic control one-way valve 12, low-pressure hose 13 and high-pressure hose 14；
The low pressure hydraulic fluid port and high pressure oil port of ground pump station 10 pass through low-pressure hose 13 and high-pressure hose 14 and respectively by test specimens
Electrohydraudic servomechanism 4 connects, and 10 high pressure oil port of ground pump station is equipped with check valve 11, for controlling hydraulic oil in high-pressure hose 14
One-way flow, when ground pump station 10 starts, check valve 11 is opened under the effect of its high pressure, and high-pressure oil flow is to by test specimen electro-hydraulic servo
Mechanism 4, when ground pump station 10 is closed, check valve 11 is in off state, prevents to flow to ground by 4 oil liquid of test specimen electrohydraudic servomechanism
Face-pumping station 10；
Low pressure hydraulic fluid port passes through equipped with hydraulic control one-way valve 12 for controlling one-way flow of the hydraulic oil in low-pressure hose 13
Introduce 10 high pressure oil port of ground pump station oil liquid controlled, ground pump station 10 start when, hydraulic control one-way valve 12 open, oil stream by
Ground pump station 10 is flowed to by test specimen electrohydraudic servomechanism 4, forms way to cycle oil, when ground pump station 10 is closed, hydraulic control one-way valve 12
It closes, prevents to flow to ground pump station 10 by 4 oil liquid of test specimen electrohydraudic servomechanism；The cracking pressure of check valve 11 is lower than fluid-control one-way
The cracking pressure of valve 12 can prevent in 10 boost process of ground pump station hydraulic control one-way valve 12 to open compared to check valve 11 and lead slowly
Oil return line blocking is caused, it also can be by the way that the pressure of ground pump station 10 be set in completion pair between check valve 11 and hydraulic control one-way valve 12
By the oil-filled of 4 fuel tank 403 of test specimen electrohydraudic servomechanism.
Charging assembly is connect with load cylinder 8, and for providing the hydraulic coupling of load cylinder 8, load cylinder 8 is provided in charging assembly
Loading force is exported under action of hydraulic force；
Test suite is connect with by test specimen electrohydraudic servomechanism 4, for powering and carrying out to by test specimen electrohydraudic servomechanism 4
Test.Test suite includes: intermediate frequency power supply 15, service cable 16, servo mechanism test instrument 17 and control cable 18；
Servo mechanism test instrument 17 is connect by controlling cable 18 with by test specimen electrohydraudic servomechanism 4, for by test specimen
Electrohydraudic servomechanism 4 is tested, and intermediate frequency power supply 15 is powered by service cable 16 by test specimen electrohydraudic servomechanism 4.
Charging assembly includes that the first load pumping plant hose 19, second loads pumping plant hose 20 and load pumping plant 21；Load pump
Stand 21 by first load pumping plant hose 19 and second load pumping plant hose 20 with load cylinder 8 connect, to load cylinder 8 provide it is hydraulic
Power realizes biaxial loadings by internal valves switching, when only the first load pumping plant hose 19 is passed through high pressure oil, realizes positive add
It carries, the low pressure oil loaded in cylinder 8 returns load pumping plant 21 by the second load pumping plant hose 20；When only second loads pumping plant hose 20
When being passed through high pressure oil, Opposite side loading is realized, the low pressure oil loaded in cylinder 8 returns load pumping plant by the first load pumping plant hose 19
21。
3 sidewall design of temperature and humidity case has low-pressure hose 13, high-pressure hose 14, service cable 16, control cable 18, first to add
It carries pumping plant hose 19, second and loads pumping plant hose 20, the opening passed through；The design of 6 both ends of long spiro nail has step, to limit load
8 piston rod 802 of cylinder by 4 piston rod 402 of test specimen electrohydraudic servomechanism by pin shaft 7 at a distance from when being connected；
As shown in figure 3, load cylinder 8 includes load cylinder cylinder body 801 and load cylinder piston rod 802；Load the upper of cylinder housing 801
Portion is connect with flexible hoist cable 9, and the lower part of load cylinder housing 801 is connect with long spiro nail 6, and load cylinder piston rod 802 is located at load cylinder
The centre of cylinder body 801, the lower end of load cylinder piston rod 802 is by pin shaft 7 and by the piston rod of test specimen electrohydraudic servomechanism 4
402 connections are mounted on shake table 1, the vibration of shake table 1 as a whole by test specimen electrohydraudic servomechanism 4 and load cylinder 8
Direction is perpendicular to ground, by the axis collinear of the axis of test specimen electrohydraudic servomechanism 4 and load cylinder 8, and the vibration with shake table 1
Direction is consistent.Loading force is internal force, is not transferred to shake table 1 and temperature and humidity case 3.
As shown in Fig. 2, including shell 401, piston rod 402, fuel tank 403 and electric-motor pump by test specimen electrohydraudic servomechanism 4
404, it is worked under two kinds of energy by test specimen electrohydraudic servomechanism 4: first is that by test specimen electrohydraudic servomechanism 4 by carrying electric-motor pump
404 starting work, fuel tank 403 store oil liquid, second is that being worked under the driving of ground pump station 10 by test specimen electrohydraudic servomechanism 4；
By the electric-motor pump 404 of test specimen electrohydraudic servomechanism 4 and 10 free switching of ground pump station, pass through check valve 11 and hydraulic control
Check valve 12 realize electric-motor pump 404 and ground pump station 10 be isolated and holding, control check valve 11 and hydraulic control one-way valve 12 are opened
Closing is opened, it is oil-filled to being carried out by the fuel tank 403 of test specimen electrohydraudic servomechanism 4.When switching to included working energy, test process without
It is additional oil-filled that progress need to be shut down.
Three stage reliability growth test flow charts are as shown in Figure 4, it is first determined the reliability growth test of first stage
Target value determines the test period and sample number of first stage according to target value, the test data further according to the first stage and
The reliability growth target value of two-stage determines reliability test time and the sample number of second stage, according to the first and second stage
Test data and three phases reliability growth target value, determine three phases the reliability growth test time and
Sample number, step are as shown in Figure 4:
Step 1: reliability growth test is divided into three phases, the target value in each stage, the target of phase III are set
Value is test catalogue scale value；
Step 2: setting first stage test sample number n1, the Censoring timet0When for task
Between；For first stage target value；M is form parameter, and α is confidence parameter；
Step 3: carrying out first stage test；
Step 4: statistics first stage test data, including the first stage failure sample number, failure the sampling test time and
Reach the sample number of Censoring time；
Step 5: setting second stage test sample number n2, Censoring time T2=inf { T >=t0: R2L(Z1, T+..., T+) >=R20, Z1 are that first stage test data (comprising first stage failure sample number, the failure sampling test time, reaches
To the sample number of Censoring time) and Censoring time first stage set；R2LFor second stage reliability R2Set
Believe lower limit；T+For second stage truncated time (total n2It is a) (assuming that no-failure),For second stage target value；
Step 6: carrying out second stage test；
Step 7: statistics second stage test data, including second stage failure sample number, failure the sampling test time and
Reach the sample number of Censoring time；
Step 8: setting phase III test sample number n3, the Censoring time
Z2For the first and second step-by-step test data (comprising first,
Second order segment fault sample number, failure sampling test time, the sample number for reaching the Censoring time) and the timing of the first and second stage
The set of truncated time；R3LFor phase III reliability R3Confidence lower limit；T+For phase III truncated time (total n3It is a) it is (false
If no-failure),For phase III target value；
Step 9: carrying out phase III test；
Step 10: the first, second and third step-by-step test data of statistics, including the first, second and third stage failure sample number, failure sample
This test period and the sample number for reaching the Censoring time；
Step 11: reliability assessment, according to the first, second and third step-by-step test data, assessment reliability value.
After reliability test stress sectional drawing is as shown in figure 5, determine every step-by-step test total time, by each test cycle 4h
Carry out test,
The test of above-mentioned carry out three phases, specific steps are identical, as follows:
1,0min, start-up loading pumping plant (21), temperature and humidity case (3) starts to cool down, while starting servo mechanism test instrument
(17)；
2,30min, temperature and humidity case (3) is cooled to -20 DEG C, and enters keeping warm mode；
3,150min, (3) -20 DEG C of heat preservations of temperature and humidity case terminate, and temperature and humidity case (3) starts to warm up；Start medium frequency electric simultaneously
Source (15), after obtaining 380V power supply by test specimen electrohydraudic servomechanism (4), by included electric-motor pump (404) work, working fluid is come
From fuel tank (403), operating pressure 17MPa；
4,160min, Central Shanxi Plain frequency power (15), included electric-motor pump (404) work terminate, and the starting that is powered terminates, and start ground
Pumping plant (10) enters drainage working condition, operating pressure 27MPa by test specimen electrohydraudic servomechanism (4), while opening shake table
(1), apply vibration environment stress, while temperature and humidity case (3) heating starts；
5,180min is continued to work under drainage state by test specimen electrohydraudic servomechanism (4), and shake table (1) works on,
Temperature and humidity case (3) is warming up to 60 DEG C, and enters keeping warm mode.
6,190min is closed shake table (1), reduces ground pump station (10) pressure to check valve (11) unlatching, fluid-control one-way
Valve (12) closes range, is monitored by servo mechanism test instrument (17) by test specimen electrohydraudic servomechanism (4) fuel tank (403) liquid level,
Ground pump station is closed after meeting the requirements, and completes Oil feeding process.
7,240min, soak terminate, and a circulation terminates.
Temperature, vibration, electricity, pressure, load iso-stress value can be applied during test by the stress profile of setting.It is hydraulic negative
Carrying load cylinder can be realized positive, negative sense load, is also able to achieve and links with by test specimen, loading force is internal force, is not transferred to vibration
Dynamic platform and temperature and humidity case；Included electric-motor pump and the ground pump station energy are able to achieve by test specimen electrohydraudic servomechanism during the test
Dual-energy source switching, improves the adequacy and validity of test.Using three-stage test method, the latter half makes full use of previous
The test data in stage, shortens total testing time compared with not being segmented.The system and test method are at low cost, can sufficiently verify
The comprehensive performance of product, load cylinder, load pumping station system are suitble to the combined test chamber of all kinds of piston output type hydraulic servomechanisms
In load test, Dual-energy source automatically switches design, and to be suitble to that all kinds of self energy component calorific values are big, the working time is short hydraulic
Servo mechanism class product.The Reliability Growth Test Method of its segmented is suitble to the electromechanics one of all kinds of Weibull Distributed Units
Body product.
Claims (9)
1. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system, characterized by comprising: shake table (1), vibration
Tooling (2), temperature and humidity case (3), chuck (5), long spiro nail (6), pin shaft (7), load cylinder (8), flexible hoist cable (9), power module,
Test suite and charging assembly；
Vibration tool (2) are housed on shake table (1), temperature and humidity case (3) passes through ground supports, and in temperature and humidity case (3) bottom
There are the opening passed through for vibration tool (2), the fixed flexible hoist cables (9) in temperature and humidity case (3) top to load the one end of cylinder (8) for centre
It is suspended in midair by flexible hoist cable (9), the other end is connect by long spiro nail (6) with chuck (5), and chuck (5) is installed on electro-hydraulic by test specimen
In servo mechanism (4), load cylinder (8) is also connect by pin shaft (7) with by test specimen electrohydraudic servomechanism (4)；It is watched by test specimen is electro-hydraulic
The bottom for taking mechanism (4) is connect with vibration tool (2)；
Power module is connect with by test specimen electrohydraudic servomechanism (4), for providing by the work energy of test specimen electrohydraudic servomechanism (4)
Source, driving are worked by test specimen electrohydraudic servomechanism (4)；
Charging assembly is connect with load cylinder (8), and for providing the hydraulic coupling of load cylinder (8), load cylinder (8) is provided in charging assembly
Action of hydraulic force under export loading force；
Test suite is connect with by test specimen electrohydraudic servomechanism (4), for powering and carrying out to by test specimen electrohydraudic servomechanism (4)
Test；
It include shell (401), piston rod (402), fuel tank (403) and electric-motor pump (404), quilt by test specimen electrohydraudic servomechanism (4)
Test specimen electrohydraudic servomechanism (4) works under two kinds of energy: first is that by test specimen electrohydraudic servomechanism (4) by carrying electric-motor pump
(404) start work, fuel tank (403) stores oil liquid, second is that by test specimen electrohydraudic servomechanism (4) under ground pump station (10) driving
Work；
By the electric-motor pump (404) of test specimen electrohydraudic servomechanism (4) and ground pump station (10) free switching, by check valve (11) with
Hydraulic control one-way valve (12) realize electric-motor pump (404) and ground pump station (10) be isolated and holding, control check valve (11) and hydraulic control
The open and close of check valve (12), it is oil-filled to being carried out by the fuel tank (403) of test specimen electrohydraudic servomechanism (4).
2. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system according to claim 1, it is characterised in that:
The power module includes: that ground pump station (10), check valve (11), hydraulic control one-way valve (12), low-pressure hose (13) and high pressure are soft
It manages (14)；
The low pressure hydraulic fluid port and high pressure oil port of ground pump station (10) pass through low-pressure hose (13) and high-pressure hose (14) and subject respectively
Part electrohydraudic servomechanism (4) connection, ground pump station (10) high pressure oil port is equipped with check valve (11), for controlling hydraulic oil in high pressure
Hose (14) interior one-way flow, ground pump station (10) start when, check valve (11) its high pressure effect under open, high-pressure oil flow to
By test specimen electrohydraudic servomechanism (4), when ground pump station (10) is closed, check valve (11) is in off state, prevents by test specimen electricity
Liquid servo mechanism (4) oil liquid flows to ground pump station (10)；
Low pressure hydraulic fluid port passes through equipped with hydraulic control one-way valve (12) for controlling one-way flow of the hydraulic oil in low-pressure hose (13)
The oil liquid for introducing ground pump station (10) high pressure oil port is controlled, and when ground pump station (10) starts, hydraulic control one-way valve (12) is opened,
Oil stream by test specimen electrohydraudic servomechanism (4) by being flowed to ground pump station (10), formation way to cycle oil, when ground pump station (10) is closed,
Hydraulic control one-way valve (12) is closed, and prevents to flow to ground pump station (10) by test specimen electrohydraudic servomechanism (4) oil liquid；Check valve (11)
Cracking pressure is lower than the cracking pressure of hydraulic control one-way valve (12).
3. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system according to claim 1, it is characterised in that:
The charging assembly includes the first load pumping plant hose (19), the second load pumping plant hose (20) and load pumping plant (21)；
It loads pumping plant (21) and pumping plant hose (20) and load cylinder (8) is loaded even by the first load pumping plant hose (19) and second
It connects, load cylinder (8) is given to provide hydraulic coupling, switched by internal valves and realize biaxial loadings, when only first loads pumping plant hose
(19) when being passed through high pressure oil, realize that forward direction loads, the low pressure oil in load cylinder (8) is added by the second load pumping plant hose (20) time
It carries pumping plant (21)；When only the second load pumping plant hose (20) is passed through high pressure oil, Opposite side loading is realized, it is low in load cylinder (8)
Pressure oil goes back to load pumping plant (21) by the first load pumping plant hose (19).
4. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system according to claim 1, it is characterised in that:
The test suite includes: intermediate frequency power supply (15), service cable (16), servo mechanism test instrument (17) and control cable (18)；
Servo mechanism test instrument (17) is connect by controlling cable (18) with by test specimen electrohydraudic servomechanism (4), for subject
Part electrohydraudic servomechanism (4) is tested, and intermediate frequency power supply (15) is given by service cable (16) by test specimen electrohydraudic servomechanism (4)
Power supply.
5. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system according to claim 1, it is characterised in that
Loading cylinder (8) includes load cylinder cylinder body (801) and load cylinder piston rod (802)；It is hung with flexibility on the top of load cylinder housing (801)
Rope (9) connection, the lower part of load cylinder housing (801) are connect with long spiro nail (6), and load cylinder piston rod (802) is located at load cylinder cylinder
The lower end in the centre of body (801), load cylinder piston rod (802) is connected by pin shaft (7) with by test specimen electrohydraudic servomechanism (4)
It connects.
6. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system according to claim 5, it is characterised in that:
There is step at described long spiro nail (6) both ends, to limit the piston rod (802) of load cylinder (8) and by test specimen electrohydraudic servomechanism
(4) distance when being connected by pin shaft (7).
7. a kind of Dual-energy source electrohydraudic servomechanism reliability growth test system according to claim 1, feature exist
In: the direction of vibration of shake table (1) is perpendicular to ground, by the axis of the axis of test specimen electrohydraudic servomechanism (4) and load cylinder (8)
Collinearly, and it is consistent with the direction of vibration of shake table (1).
8. a kind of Dual-energy source electrohydraudic servomechanism realized based on the pilot system as described in any one of claim 1~7 is reliable
Property growth test method, it is characterised in that steps are as follows:
Step 1: reliability growth test is divided into three phases, the target value in each stage is set, the target value of phase III is
Test catalogue scale value；
Step 2: setting first stage test sample number n1, the Censoring timet0For task time；For first stage target value；M is form parameter, and α is confidence parameter；
Step 3: carrying out first stage test；
Step 4: statistics first stage test data, including first stage failure sample number, failure and reach the sampling test time
The sample number of Censoring time；
Step 5: setting second stage test sample number n2, Censoring time T2=inf { T >=t0: R2L(Z1, T+..., T+)
>=R20, Z1 are that first stage test data (comprising first stage failure sample number, the failure sampling test time, reaches timing section
The sample number of tail time) and Censoring time first stage set；R2LFor second stage reliability R2Confidence lower limit；T+
For second stage truncated time (total n2It is a) (assuming that no-failure),For second stage target value；
Step 6: carrying out second stage test；
Step 7: statistics second stage test data, including second stage failure sample number, failure and reach the sampling test time
The sample number of Censoring time；
Step 8: setting phase III test sample number n3, the Censoring time；
Z2It (include the first and second rank for the first and second step-by-step test data
Segment fault sample number, failure sampling test time, the sample number for reaching the Censoring time) and the first and second stage Censoring
The set of time；R3LFor phase III reliability R3Confidence lower limit；T+For phase III truncated time (total n3It is a) (assuming that nothing
Failure),For phase III target value；
Step 9: carrying out phase III test；
Step 10: the first, second and third step-by-step test data of statistics, refer to the first, second and third stage failure sample number, failure sample examination
It tests the time and reaches the sample number of Censoring time.
9. a kind of Dual-energy source electrohydraudic servomechanism Reliability Growth Test Method according to claim 8, it is characterised in that:
The first stage test, second stage test, phase III test carry out as follows:
(1) 0min, start-up loading pumping plant (21), temperature and humidity case (3) start to cool down, while starting servo mechanism test instrument (17)；
(2) 30min, temperature and humidity case (3) is cooled to -20 DEG C, and enters keeping warm mode；
(3) 150min, temperature and humidity case (3) heat preservation terminate, and temperature and humidity case (3) starts to warm up；Start intermediate frequency power supply (15), quilt simultaneously
It after test specimen electrohydraudic servomechanism (4) obtains power supply, is worked by electric-motor pump (404), working fluid comes from fuel tank (403), work
Pressure 17MPa；
(4) 160min is closed intermediate frequency power supply (15), and electric-motor pump (404) work terminates, and the starting that is powered terminates, and starts ground pump station
(10), enter drainage working condition, operating pressure 27MPa by test specimen electrohydraudic servomechanism (4), while opening shake table (1), apply
Add vibration environment stress, while temperature and humidity case (3) heating starts；
(5) 180min is continued to work under drainage state by test specimen electrohydraudic servomechanism (4), and shake table (1) works on, temperature
Humidity cabinet (3) is warming up to 60 DEG C, and enters keeping warm mode；
(6) 190min is closed shake table (1), reduces ground pump station (10) pressure to check valve (11) unlatching, hydraulic control one-way valve
(12) range is closed, by servo mechanism test instrument (17) monitoring by test specimen electrohydraudic servomechanism (4) fuel tank (403) liquid level, completely
Foot closes ground pump station after requiring, complete Oil feeding process；
(7) 240min, soak terminate, and a circulation terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711234626.9A CN108087382B (en) | 2017-11-30 | 2017-11-30 | A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711234626.9A CN108087382B (en) | 2017-11-30 | 2017-11-30 | A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108087382A CN108087382A (en) | 2018-05-29 |
| CN108087382B true CN108087382B (en) | 2019-08-09 |
Family
ID=62172469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711234626.9A Active CN108087382B (en) | 2017-11-30 | 2017-11-30 | A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108087382B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146859B (en) * | 2020-09-04 | 2023-03-14 | 上海航天控制技术研究所 | Servo mechanism pneumatic loading device and servo mechanism zero pressure maintaining test method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768261A (en) * | 1972-11-06 | 1973-10-30 | Harnischfeger Corp | Control system for hoist testing apparatus |
| JP3340085B2 (en) * | 1999-04-13 | 2002-10-28 | 日本たばこ産業株式会社 | Material testing machine |
| CN201926584U (en) * | 2010-10-11 | 2011-08-10 | 杨文鑫 | Accelerated life test unit |
| CN103713674A (en) * | 2013-12-30 | 2014-04-09 | 苏州苏试试验仪器股份有限公司 | Control method for vibration, temperature and humidity comprehensive test device |
| CN203929417U (en) * | 2014-06-26 | 2014-11-05 | 吉林大学 | Mix-loaded servo drive system reliability test bench |
| CN105628405A (en) * | 2015-12-19 | 2016-06-01 | 中车青岛四方机车车辆股份有限公司 | Method and device for testing high speed train comprehensive comfort |
| CN105784396A (en) * | 2016-03-03 | 2016-07-20 | 吉林大学 | Hydraulic system component reliability test device and method including environment field |
| CN106292771A (en) * | 2016-08-04 | 2017-01-04 | 上海航天控制技术研究所 | A kind of star sensor temperature field measurement and control devices and methods therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273351A (en) * | 1999-05-05 | 2000-11-15 | 李凤仪 | Method for exploiting and utilizing geothermic energy in geothermic or non-geothermic region |
-
2017
- 2017-11-30 CN CN201711234626.9A patent/CN108087382B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768261A (en) * | 1972-11-06 | 1973-10-30 | Harnischfeger Corp | Control system for hoist testing apparatus |
| JP3340085B2 (en) * | 1999-04-13 | 2002-10-28 | 日本たばこ産業株式会社 | Material testing machine |
| CN201926584U (en) * | 2010-10-11 | 2011-08-10 | 杨文鑫 | Accelerated life test unit |
| CN103713674A (en) * | 2013-12-30 | 2014-04-09 | 苏州苏试试验仪器股份有限公司 | Control method for vibration, temperature and humidity comprehensive test device |
| CN203929417U (en) * | 2014-06-26 | 2014-11-05 | 吉林大学 | Mix-loaded servo drive system reliability test bench |
| CN105628405A (en) * | 2015-12-19 | 2016-06-01 | 中车青岛四方机车车辆股份有限公司 | Method and device for testing high speed train comprehensive comfort |
| CN105784396A (en) * | 2016-03-03 | 2016-07-20 | 吉林大学 | Hydraulic system component reliability test device and method including environment field |
| CN106292771A (en) * | 2016-08-04 | 2017-01-04 | 上海航天控制技术研究所 | A kind of star sensor temperature field measurement and control devices and methods therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108087382A (en) | 2018-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101387598B (en) | Rock porosity real-time test device under action of Chemosmosis and creep coupling | |
| CN101587027B (en) | System for testing heat-transfer performance of gas-water-oil heat interchanger | |
| CN104215513B (en) | High-pressure hydrogen embrittlement structure test device and test method | |
| CN102393340A (en) | Hydraulic fatigue test system of connecting rod | |
| CN111413119B (en) | Performance test platform suitable for core equipment of supercritical carbon dioxide Brayton cycle power generation system | |
| CN110044722A (en) | Superhigh temperature high frequency material mechanical property tester device and method | |
| CN108087382B (en) | A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method | |
| CN210375687U (en) | Detection apparatus for simulation deep sea environment reciprocating motion sealing washer sealing performance | |
| CN208653742U (en) | It is a kind of sealing and the testing integrated machine of pulse | |
| CN105445046B (en) | A kind of refrigeration and pressure charging system for pipeline structure environmental simulation | |
| CN213235413U (en) | Hydrogen diaphragm compressor sledge circulation test fixture | |
| CN201688956U (en) | Hydraulic testing stand | |
| CN109580229A (en) | A kind of consecutive pressurization system syndication platform experimental rig | |
| CN203069459U (en) | Insulator internal pressure testing device | |
| CN202229995U (en) | Hydraulic connection rod fatigue test system | |
| CN105973552A (en) | Complex environment coordination loading system of vibration test of low-temperature propellant delivery line | |
| CN106438581A (en) | Hydraulic motor detection experimental system | |
| CN110173472A (en) | The test bed hydraulic system of wind turbine gearbox flexible pin shaft and its control method | |
| CN201488877U (en) | Altitude simulator | |
| CN115492983A (en) | Automatic valve opening controller and control method thereof | |
| CN105628500B (en) | A kind of temperature coefficient test system of rock thermal insulation STRESS VARIATION | |
| CN204575328U (en) | The test macro of checking engine PTO fan-out capability | |
| CN111551353A (en) | Modular power assembly test system and application | |
| CN103217340B (en) | High-temperature high-pressure part damage and failure procedure experimental provision | |
| CN112504656A (en) | Buoyancy adjusting mechanism testing device for simulating underwater pressure environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |