CN104090564A - Method for testing faults of antiskid brake control box under complex working conditions - Google Patents
Method for testing faults of antiskid brake control box under complex working conditions Download PDFInfo
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- CN104090564A CN104090564A CN201410312137.0A CN201410312137A CN104090564A CN 104090564 A CN104090564 A CN 104090564A CN 201410312137 A CN201410312137 A CN 201410312137A CN 104090564 A CN104090564 A CN 104090564A
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Abstract
Provided is a method for testing faults of an antiskid brake control box under complex working conditions. Integrated environment stress and a working current are applied to the antiskid brake control box at the same time, testing of five integrated environment stress cycles is carried out, and therefore the faults, about the integrated environment stress and the working current, of the antiskid brake control box are motivated at the same time. When the antiskid brake control box has the faults in a testing process, technical improvement on fault correction should be conducted, and then testing is conducted again until no fault occurs in the five cycles. According to the method, the capability of the antiskid brake control box to adapt to the integrated environment stress can be enhanced, and therefore the antiskid brake control box has no fault when being used under integrated environment conditions.
Description
Technical field
The present invention relates to the fault test field of civil aircraft electronic product under temperature, vibration, electric current combined action, specifically a kind of method of testing that excites and correct antiskid braking control box potential faults under integrated environment stress, electric current act on simultaneously.
Background technology
Temperature, vibration integrated working current condition are the service conditions that airplane brake system often runs into, and the components and parts of electronic product easily occur crackle at solder joint position under above-mentioned conditioning, also may occur performance drift, make performance inconsistency lattice.The condition that may run in temperature, vibration integrated working current condition test simulation use is carried out, and reaches the object that excites and correct electronic product potential faults.
The test that temperature and vibration are carried out simultaneously also claims integrated environment stress test.The object that applies again working current is under true service condition, to excite the fault of antiskid braking control box.Apply the method for integrated environment condition and working current simultaneously, there is no at present standard both at home and abroad.
The chief editor's of General Motors Overseas Corporation the high accelerated aging of GMW8287 < <, highly accelerated stress screen and sampling observation > > standard proposed to apply the experimental technique of high temperature, fast temperature variation, low temperature, vibration under power on condition, is called integrated environment stress test.Testing requirements is carried out technological improvement for the fault inspiring, and proceeds in process of the test till non-fault.The feature of this standard is integrated environment stress+energising, rather than integrated environment stress+working current.
The testing apparatus of GMW8287 standard recommendation is that tool is the vibrational system of Triaxiality and six degrees of freedom and the reliability enhancement testing equipment that simultaneously possesses 60 ℃/min rate temperature change, does not recommend other testing equipments.
The object of integrated environment condition test is the potential faults such as the rosin joint, component thermal stress damage, vibration stress damage of excitation electron product, according to failure cause, propose recommendation on improvement, thereby reach the object of the integrated environment adaptive faculty that improves at short notice electronic product.
Antiskid braking control box is the electronic product in Aircraft Anti-skid Break Control; the several functions such as be designed with antiskid function in take-off line brake function, landing braking process, protect between the wheel of the ground protection function while landing, landing mission middle left and right undercarriage wheel, any function does not meet designing requirement and is and breaks down.
The parameter of integrated environment stress test sectional view derives from the data that the test of hot operation stress limit, the test of low-temperature working stress limit, temperature cycling test, vibration stress limit test obtain.For the fault inspiring in the test of hot operation stress limit, the limit test of low temperature stepstress, temperature cycling test, the limit test of vibration working stress, carry out respectively technological improvement.After improving, according to the hot operation stress limit test data finally obtaining, low-temperature working stress limit test data, vibration working stress test data and temperature cycling test data, formulate integrated environment stress test section and test by section, excitation electron product is sensitive to the potential faults of integrated environment stress, by technological improvement, improve the development quality of electronic product, shorten the development time of electronic product.
In tradition development process, the environmental test condition of electronic product is divided into following two kinds:
1) according to GJB1032 < < electronic product Environment Stress Screening Method > > or MIL-STD-2164 < < electronic equipment Environment Stress Screening Method > >, apply temperature cycles condition, intensification and rate of temperature fall are 5 ℃/min, in process of the test, switch on.After finishing, temperature cycling test carries out the vibration of three mutually perpendicular directions, each direction 5min, acceleration-root-mean square is 6.05Grms, although this method has obvious effect to the defects such as rosin joint of screening electronic product, but still some solder joint in use ruptures, or there is other faults, screening defect is not thorough;
2) the combined stress applying method of taking the lead in the high accelerated aging/highly accelerated stress screen of GMW8287 < < write and sampling observation > > according to General Motors Overseas Corporation is tested, the intensification of this standard recommendation or rate of temperature fall are 45 ℃/min～60 ℃/min, in process of the test, switch on, although the defects such as screening electronic product welding are had to remarkable effect, but owing to having ignored the impact of working current on defects such as welding, therefore the defect excitations such as welding under temperature cycles and working current condition are not very desirable, because the current amplitude of energising is less than working current amplitude, test process does not experience the thermal stress check of working current,
In order to overcome above-mentioned deficiency, both at home and abroad electron trade is being sought the measuring technology of the defects such as more effective excitation electron product rosin joint always.
Foreign current situation:
External integrated environment stress test technology emerges and in the electronic product in the fields such as Aeronautics and Astronautics, promotes rapidly as far back as the U.S., Bing western countries are universal, its sign is the GMW8287 standard that General Motors Overseas Corporation in 2002 edits and promulgates, contains integrated environment stress test part in standard.According to the potential faults inspiring in integrated environment stress test, carry out technological improvement, till being improved to the cycle index by integrated environment stress test, cycle index is 3 times～5 times.The standard of passing through is in cyclic process, not occur that relevant fault, relevant fault refer to the fault that product self reason causes, see GJB899A, GJB451A.GMW8287 master gauge fixes in process of the test and only applies integrated environment stress energising, and failed call applies working current.
Present status in China:
Be subject to the impact of external advanced experimental technique, the integrated environment stress test of domestic electronic product is implemented for many years in the enterprise with three kinds of capital, Sole Proprietorship, and the standard of reference is GMW8287.Approximately there are more than 100 individual proprietorship or the enterprise with three kinds of capital to have reliability enhancement testing equipment, and the code requirement of integrated environment stress test as Developing Electronic Products will be carried out, according to the potential faults inspiring in integrated environment stress test process, complete the fault correction measure of same model electronic product.
Stateowned enterprise adopted integrated environment stress test technology since 2011 in electronic product development, excited and eliminate the potential faults of electronic product in development.
Technical know-how due to external more than 50 years, make stateowned enterprise and product development unit lack understanding to this technology, government offices do not promulgate standard or the regulation of this technology of application, so untapped this technology in electronic product development, each electronic product research institute does not include integrated environment stress test in development standard yet.
Five of Guangzhou electronics, industry 301Suo Deng unit of Beijing Institute of Aeronautics Research on Automobile's Reliability Engineering Suo He Air China research electronic product integrated environment stress survey technology be existing more than the 10 year time all, testing equipment and technical capability have all been passed through national technical appraisement, become the qualification unit of national environment and fail-test.
Integrated environment stress test is based upon on the basis of the test of low-temperature working stress limit, the test of hot operation stress limit, vibration working stress marginal test and temperature cycling test.
That the present invention carries out the fault test of antiskid braking control box under integrated environment stress and working current act on simultaneously with domestic and international prior art essential distinction.
In the patent No., be: a kind of method that discloses antiskid braking control box low-temperature working stress limit test in the innovation and creation of 201110310883.2..The method adopts Reliability Enhancement Testing case to test, and the frequency range of this chamber is 10～10000Hz, and has the pseudorandom vibration ability of Triaxiality and six degrees of freedom.Test parameters has following technical characterictic:
1) rate of temperature fall of the low-temperature working stress test of three embodiment: 25 ℃/min, 40 ℃/min, 60 ℃/min;
2) retention time in each step-length: the required actual required time of about 5min=of real time of low-temperature stabilization time+5min+ test antiskid braking control box output current of antiskid braking control box;
3) three embodiment antiskid braking control boxes of test carry out the low-temperature working stress limit after technological improvement: be respectively :-70 ℃, and-75 ℃ ,-80 ℃;
4) the 4 times/min of frequency of operation of test exemplar.
Low temperature parameter of the present invention is determined with reference to above-mentioned parameter.
In the patent No., be: in 201110310885.1 innovation and creation, disclose the method that applies working current test antiskid braking control box hot operation stress limit.The method adopts Reliability Enhancement Testing case to test, and test parameters has following technical characterictic:
1) heating rate of the hot operation stress test of three embodiment: 20 ℃/min, 40 ℃/min, 60 ℃/min;
2) retention time in each step-length: the required actual required time of about 5min=of real time of high-temperature stable time+5min+ test antiskid braking control box output current of antiskid braking control box;
3) the hot operation stress limit of three embodiment antiskid braking control boxes being carried out after technological improvement is respectively: 100 ℃, and 120 ℃, 130 ℃;
4) the 4 times/min of frequency of operation of test exemplar.
High temperature parameter of the present invention is determined with reference to above-mentioned parameter.
In the patent No., be: in 201110310884.7 innovation and creation, disclose the method for carrying out the limit test of antiskid braking control box vibration working stress, the method adopts Reliability Enhancement Testing case to test, and test parameters has following technical characterictic:
1) set-point of three embodiment antiskid braking control boxes vibration working stress limit test is respectively from 5Grms,, 10Grms, 15Grms starts;
2) in the limit test of three embodiment antiskid braking control box vibration working stresses, the retention time reaching after maximum amount value is: 5min+ performance test stabilization time time 5min;
3) in the limit test of three embodiment antiskid braking control box vibration working stresses, the vibration working stress limit reaching is respectively: 50Grms, 40Grms, 60Grms;
4) the 4 times/min of frequency of operation of test exemplar.
In the innovation and creation that are 201410256166.X at application number, disclose the method for testing antiskid braking control box potential faults under temperature cycles condition, the method adopts Reliability Enhancement Testing case to test, and test parameters is in Table 1.
Table 1 temperature cycling test excites the main test data summary sheet of antiskid braking control box potential faults
Temperature cycles parameter of the present invention is determined with reference to low-temperature working stress test data, hot operation stress test data, vibration working stress test data and table 1 data.
With regard to exciting the potential faults of antiskid braking control box, above-mentioned four innovation and creation all have the following disadvantages:
Can independently excite respectively antiskid braking control box and low temperature, high temperature, vibration, fault that temperature cycles is relevant, but can not excite the fault in the presence of simultaneously in integrated temperature, vibration, working current condition, in use procedure, have different temperatures, vibration force, the situation of working current combined action simultaneously on antiskid braking control box.
For making up the deficiency of foregoing invention, be necessary to invent a kind of integrated environment stress survey technology, excite the method for antiskid braking control box potential faults.
Summary of the invention
For overcome in prior art, exist can not, for exciting the deficiency of antiskid braking control box fault under complex working condition, the present invention proposes the method for antiskid braking control box fault under a kind of testing complex operating mode.
Concrete steps of the present invention are:
Step 1, determine the high temperature numerical value that applies integrated environment stress to antiskid braking control box: to antiskid braking control box apply the temperature of the high temperature numeric ratio hot operation limit of closing environmental stress low 5 ℃～10 ℃;
Step 2, determine the low temperature numerical value that applies integrated environment stress to antiskid braking control box: to antiskid braking control box apply the temperature of the low temperature numeric ratio low-temperature working limit of closing environmental stress high 5 ℃～10 ℃;
Step 3, determines the rate temperature change that applies integrated environment stress to antiskid braking control box: the rate temperature change applying is 25 ℃/min～55 ℃/min;
Step 4, determine the vibration increment of acceleration root-mean-square value in the initial set-point of acceleration root-mean-square value in vibration test and each vibration cycles:
The vibration of integrated environment stress requires to comprise the initial set-point of acceleration root-mean-square value and the vibration increment of the acceleration root-mean-square value of each vibration cycles from second vibration cycles; The initial set-point of acceleration root-mean-square value of determining Reliability Enhancement Testing case in combined environment test is 8Grms～12Grms, and from second vibration cycles, each vibration cycles is divided into two stages, and the increment of acceleration root-mean-square value described in the first stage is all identical with the acceleration root-mean-square value in first vibration cycles; Second stage is micro-vibration, and time of vibration is 10min, carries out performance test in micro-time of vibration simultaneously; Micro-vibration stress that second stage applies is 5Grms; ;
Step 5, determines the working current that in process of the test, antiskid braking control box is exported: the antiskid brake electric current of antiskid braking control box output 0mA～40mA; Frequency of operation is 4 times/min～12 time/min; And apply all the time working current in a test profile;
Step 6, determines the retention time of Reliability Enhancement Testing case maximum temperature and the retention time of minimum temperature: the retention time of described definite Reliability Enhancement Testing case maximum temperature is the duration that the environment temperature in Reliability Enhancement Testing case reaches after maximum temperature to be: the continuation heating-up time+antiskid braking control box of antiskid braking control box reaches the retention time+Performance Detection time after maximum temperature; The retention time of described minimum temperature is
The duration that environment temperature in Reliability Enhancement Testing case reaches after minimum temperature is: the continuation temperature fall time+antiskid braking control box of antiskid braking control box reaches the retention time+Performance Detection time after minimum temperature.
Step 7, determine the test profile that applies complex working condition:
Described complex working condition test profile refers to antiskid braking control box is applied with to temperature, vibration and working current simultaneously; In described complex working condition test profile: the frequency of vibration is 10～10000Hz, acceleration root-mean-square value maximum can reach 60Grms, and adopts the pseudorandom vibration of Triaxiality and six degrees of freedom.
Test profile relates to definite following parameters:
Maximum temperature, the minimum temperature of test, temperature rate-of-rise, temperature fall off rate, the retention time of maximum temperature, the retention time of minimum temperature, temperature cycles number of times, the vibration cycles number of times of test, and the set-point of each vibration cycles, increment, maximum amount, micro-vibratory output and micro-time of vibration, apply the magnitude of voltage that frequency and each circulation apply that applies of the maximum amount value of pulsating current and pulsating current.
The magnitude of voltage that described each circulation applies is respectively: first circulation applies 31V voltage, and second circulation applies 27V voltage, and the 3rd circulation applies 23V voltage, and the 4th circulation applies 31V voltage, and the 5th circulation applies 27V voltage.
Step 8, according to determined test profile, test:
The described process of testing according to determined test profile comprises the cyclic test of 5 complex working conditions; In process of the test, the electric current of antiskid braking control box output is 0mA～40mA, 4～12 times/min of frequency of operation;
I humid test:
Humid test process is: since 20 ℃, rate of temperature fall with 25 ℃/min～55 ℃/min is down to-65～-75 ℃ by chamber temperature, keep 60～70min, if described antiskid braking control box breaks down, finish test, this antiskid braking control box is carried out restarting test after technological improvement; If described antiskid braking control box does not break down, heating rate with 25 ℃/min～55 ℃/min rises to 95～125 ℃ by chamber temperature, keep 50～60min, wherein, 10min carries out performance test simultaneously, if described antiskid braking control box breaks down, finish test, this antiskid braking control box is carried out restarting test after technological improvement; If described antiskid braking control box does not break down, with the rate of temperature fall of 25 ℃/min～55 ℃/min, chamber temperature is down to-65 ℃; So far, complete one since 20 ℃ → cooling → low temperature → intensification → high temperature → cooling low/high temperature circulation process of the test; By above-mentioned low/high temperature circulation process of the test carry out temperature cycling test, circulate altogether 5 times;
II vibration test
The time of a vibration cycles is identical with the time of a described low/high temperature circulation;
The process of vibration test is: the rear 10min of first vibration cycles carries out performance test; Vibration set-point in first vibration cycles is 8Grms～12Grms;
From second vibration cycles, each vibration cycles is divided into two stages: the time of vibration of first stage is: the time/min-10min of a low/high temperature circulation, and in second vibration cycles, the increment of acceleration root-mean-square value is identical with the acceleration root-mean-square value in first circulation; Second stage is micro-vibration, and time of vibration is 10min, carries out performance test in micro-time of vibration simultaneously; Micro-vibration stress that second stage applies is 5Grms;
The process of the test of the 3rd vibration cycles～five vibration cycles is identical with the process of the test of second circulation; In described the 3rd vibration cycles～five vibration cycles, first stage acceleration root-mean-square value all increases on the basis of the first stage vibration value of previous vibration cycles, and the vibration increment of this acceleration root-mean-square value is all identical with the acceleration root-mean-square value in first vibration cycles; Micro-vibration stress that second stage applies is 5Grms;
The scope of high acceleration root-mean-square value is: 40Grms～60Grms;
In the process of the test in described 5 circulations, when antiskid braking control box does not all break down, finish test; When breaking down in process of the test, should carry out technological improvement for fault, after improvement, restart test, until in the process of the test of 5 circulations non-fault.
According to external experience, through the electronic product of integrated environment stress test, owing to having eliminated the potential faults that is sensitive to integrated environment stress, therefore in use seldom there is the fault occurring under temperature, vibration integrated action condition.
The present invention is the test method that a kind of integrated environment stress and working current apply simultaneously, by described method, test and implement the object that technological improvement just can reach raising antiskid braking control box adaptation integrated environment stress, thereby can not break down while making antiskid braking control box in use run into integrated environment condition.
Existing integrated environment stress test method is compared in Table 2 with the technology of the present invention.
Table 2 existing integrated environment stress test method and the technology of the present invention contrast table
Accompanying drawing explanation
Fig. 1 is the integrated environment stress test section of the embodiment of the present invention 1;
Fig. 2 is the integrated environment stress test section of the embodiment of the present invention 2;
Fig. 3 is the integrated environment stress test section of the embodiment of the present invention 3;
Fig. 4 is process flow diagram of the present invention.
Embodiment
Three embodiment of the present invention carry out respectively the test of integrated environment stress and working current to the antiskid braking control box of three kinds of civil transport brake system.Test objective is to excite and correct the potential faults of these three kinds of antiskid braking control boxes under integrated environment stress and working current effect.
Test exemplar in three embodiment all extracts in the product of current payment, and the test exemplar of each embodiment is 1 cover.
The testing equipment that three embodiment of the present invention adopt is the equipment of assay approval, and before the deadline, in Table 3.Test fixture in test is production line frock.
Table 3 testing equipment table
| Sequence number | Device name | Quantity | The place of production | Purposes |
| ? | Reliability Enhancement Testing case | 1 | Italy | High temperature, low temperature, temperature cycles, vibration condition are provided |
| ? | Signal source | 1 | Domestic | Simulate anti-skidding signal |
| ? | Oscillograph | 1 | Domestic | Show working curve |
| ? | Numeral avometer | 1 | Domestic | Normally whether test circuit |
Embodiment 1
The present embodiment is that the antiskid braking control box of the domestic branch line carrier of the first brake system is carried out to the test of integrated environment stress and working current, if break down in process of the test, just for fault, technological improvement suggestion is proposed, until do not break down in process of the test.The concrete steps of the present embodiment are:
Step 1, determines the high temperature numerical value that applies integrated environment stress to antiskid braking control box
To antiskid braking control box, apply the high temperature numerical basis hot operation limit of closing environmental stress and determine, lower than 5 ℃ of the hot operation limit.
When determining the high temperature numerical value of integrated environment stress test, first in the innovation and creation that are 201110310885.1 according to the patent No., the method for disclosed definite airplane antiskid braking control box hot operation stress limit is determined and is being applied the hot operation limit under working current condition, complete the process of the test of the antiskid braking control box hot operation limit, obtain the hot operation limit of antiskid braking control box.According to the hot operation limit of the antiskid braking control box obtaining, determine the high temperature numerical value of integrated environment stress test.The high temperature numerical value of described integrated environment stress test is lower than 5 ℃ of the hot operation limit.
According in the 201110310885.1 hot operation marginal test results of announcing, this antiskid braking control box is 100 ℃ through improving the hot operation limit finally reaching.
The test exemplar that the present embodiment test exemplar and 201110310885.1 inventions adopt is the same trade mark, therefore can directly quote 100 ℃ of the original hot operation limit, and the high temperature numerical value of test profile is got 95 ℃.
Step 2, determines the low temperature numerical value that applies integrated environment stress to antiskid braking control box
To antiskid braking control box, apply the low temperature numerical basis low-temperature working limit of closing environmental stress and determine, higher than 5 ℃ of the low-temperature working limit.
When determining the low temperature numerical value of integrated environment stress test, first the method for disclosed definite airplane antiskid braking control box low-temperature working stress limit in the innovation and creation that are 201110310883.2 according to the patent No., determine and applying low temperature working limit under working current condition, complete the process of the test of this antiskid braking control box low-temperature working limit, obtain the low-temperature working limit of this antiskid braking control box.According to the low-temperature working limit of the antiskid braking control box obtaining, determine the low temperature numerical value of integrated environment stress test.The low temperature numerical value of described integrated environment stress test is higher than 5 ℃ of the low temperature damage limit.
According to the 201110310883.2 low-temperature working marginal test results of announcing: this antiskid braking control box is-70 ℃ through improving the low-temperature working limit finally reaching.
The test exemplar that the present embodiment test exemplar and 201110310883.2 inventions adopt is the same trade mark, can directly quote the original low-temperature working limit-70 ℃, so the low temperature numerical value of test profile is got-65 ℃.
Step 3, determines the rate temperature change that applies integrated environment stress to antiskid braking control box
The intensification that GMW8287 recommends or rate of temperature fall are 45 ℃/min～60 ℃/min, are applicable to the process of the test under the condition of uncapping;
The present invention tests under lid cover fillet part, and the rate temperature change scope applying is defined as 25 ℃/min～55 ℃/min, and development test technology within the scope of wider rate temperature change is saved the energy under the condition of warranty test effect.
The definite rate temperature change of the present embodiment is 25 ℃/min.
Step 4, determine the vibration increment of acceleration root-mean-square value in the initial set-point of acceleration root-mean-square value in vibration test and each vibration cycles:
In described definite vibration test, the initial set-point of acceleration root-mean-square value is according to 1/5 value of the vibration working limit of stipulating in GMW8287.
The vibration of integrated environment stress requires to comprise the initial set-point of acceleration root-mean-square value and from second vibration cycles, the vibration increment of the acceleration root-mean-square value of each vibration cycles.The initial set-point of acceleration root-mean-square value of determining Reliability Enhancement Testing case in combined environment test is 8Grms～12Grms, and from second circulation, described in each circulation first stage, the increment of acceleration root-mean-square value is all identical with the acceleration root-mean-square value in first vibration cycles; Second stage is micro-vibration, and time of vibration is 10min, carries out performance test in micro-time of vibration simultaneously; Micro-vibration stress that second stage applies is 5Grms; The highest vibration value scope is 40Grms～60Grms.
In the present embodiment, determine that in vibration test, the initial set-point of acceleration root-mean-square value is 10Grms, described Grms is acceleration root-mean-square value.From second vibration cycles, the increment of acceleration root-mean-square value described in each vibration cycles is all identical with the acceleration root-mean-square value in first vibration cycles, from second vibration cycles, described in each circulation, the increment of acceleration root-mean-square value is 10Grms, the acceleration root-mean-square value that makes second vibration cycles is 20Grms, the acceleration root-mean-square value of the 3rd vibration cycles is 30Grms, the acceleration root-mean-square value of the 4th vibration cycles is 40Grms, and the acceleration root-mean-square value of the 5th vibration cycles is 50Grms.High acceleration root-mean-square value is 50Grms
Step 5, determines the working current that in process of the test, antiskid braking control box is exported
The antiskid brake electric current of the present embodiment antiskid braking control box output 0mA～40mA; Frequency of operation is 4 times/min.
The working current of sliding brake-control box output is for controlling the brake pressure of servo-valve output, and described brake pressure comprises shuts down brake pressure, take-off line brake pressure, the differential brake pressure of ground taxi and landing antiskid brake pressure.The electric current of antiskid braking control box output is directly proportional to the pressure of servo-valve output, the present embodiment selects to apply landing antiskid brake pressure, and apply with the pulsation recycle design of deeply skidding, when antiskid braking control box electric current is output as 40mA, it is 10MPa that servo-valve is exported maximum brake pressure, when antiskid braking control box output current is 0mA, the brake pressure of antiskid braking control box output is 0MPa.Applying of working current requires to require identical with Performance Detection.
Definite duration that applies working current refers to apply the time of working current in a test profile.The present embodiment applies all the time working current in a test profile.
Step 6, determines the retention time of Reliability Enhancement Testing case maximum temperature and the retention time of minimum temperature
In order to be consistent with use state, in the present embodiment, antiskid braking control box is tested under lid cover fillet part.
The maximum temperature of antiskid braking control box is the temperature during than low 5 ℃ of the hot operation limit of this antiskid braking control box; The temperature of 5 ℃ when minimum temperature is higher than the low-temperature working limit of antiskid braking control box.
When the environment temperature in Reliability Enhancement Testing case reaches maximum temperature, antiskid braking control box need to continue to heat a period of time and just can reach maximum temperature; Antiskid braking control box keeps 5min after reaching maximum temperature, makes the performance of testing control enclosure after the performance change under components and parts experience hot conditions.The duration reaching after maximum temperature is: the continuation heating-up time+antiskid braking control box of antiskid braking control box reaches the retention time+Performance Detection time after maximum temperature.In test process, in the surperficial sticking temperature sensor test temperature of antiskid braking control box.The present invention adopt in 201410256166.X disclosed under temperature cycles condition definite high-temperature duration in the method for testing airplane antiskid braking control box fault, the duration under maximum temperature condition is 60min.
When the environment temperature in Reliability Enhancement Testing case reaches minimum temperature, antiskid braking control box a period of time of need to continuing to lower the temperature just can reach minimum temperature; Antiskid braking control box keeps 5min after reaching minimum temperature, makes the performance change under components and parts experience cryogenic conditions; Then test the performance of control enclosure.The duration reaching after minimum temperature is: the continuation temperature fall time+antiskid braking control box of antiskid braking control box reaches the retention time+Performance Detection time after minimum temperature.In test process, at the surface label temperature sensor probe temperature of antiskid braking control box.
The present invention adopt in 201410256166.X disclosed under temperature cycles condition definite low temperature duration in the method for testing airplane antiskid braking control box fault, the duration under minimum temperature condition is 70min.
Step 7, determines the test profile that applies complex working condition
Described complex working condition refers to antiskid braking control box is applied to integrated environment stress and working current simultaneously, is specifically applied with temperature, vibration and electric current simultaneously, and this test profile is called the test profile of complex working condition.In described complex working condition test profile: the frequency of vibration is 10～10000Hz, acceleration root-mean-square value is 50Grms, and adopts the pseudorandom vibration of three weeks six degree of freedoms, and pseudorandom vibration is provided by Reliability Enhancement Testing case.
The flow process of formulating complex working condition test profile is: the initial temperature of temperature cycling test program is 20 ℃;---in the protracted test of minimum temperature,---heat up---in protracted test of maximum temperature---cools to 20 ℃ from initial temperature, to start cooling; From test, carry out at the very start vibration test, and apply working current simultaneously, realize the process of the test that temperature, vibration, electric current apply simultaneously.Test profile relates to definite following parameters:
Test maximum temperature be 95 ℃, test minimum temperature be 65 ℃, temperature rate-of-rise, 25 ℃/min, temperature fall off rate, 25 ℃/min.And:
Duration under maximum temperature condition, when the environment temperature in Reliability Enhancement Testing case reaches maximum temperature, antiskid braking control box need to continue to heat a period of time and just can reach maximum temperature; After reaching maximum temperature, keep a period of time, make the performance change under components and parts experience hot conditions; Then test the performance of control enclosure.The duration reaching after maximum temperature is: the continuation heating-up time 45min+ antiskid braking control box of antiskid braking control box reaches the retention time 5min+ Performance Detection time 10min after maximum temperature; The duration of the present embodiment under maximum temperature condition is 60min.
Duration under minimum temperature condition, when the environment temperature in Reliability Enhancement Testing case reaches minimum temperature, antiskid braking control box a period of time of need to continuing to lower the temperature just can reach minimum temperature; After reaching minimum temperature, keep a period of time, make the performance change under components and parts experience cryogenic conditions; Then test the performance of control enclosure, in process of the test, the electric current of antiskid braking control box output is 0mA～40mA.The duration reaching after minimum temperature is: the continuation temperature fall time 45min+ antiskid braking control box of antiskid braking control box reaches the retention time 5min+ Performance Detection time 10min after minimum temperature.In test process, at the surface label temperature sensor probe temperature of antiskid braking control box.
Temperature cycles number of times, determines that temperature cycles number of times is 5 times, and the test period of each circulation is 143min.
Determine and to carry out 5 vibration cycles, the maximum amount of each vibration cycles, and the micro-vibratory output of each vibration cycles after finishing; The set-point of first vibration cycles is 10Grms, and Grms is acceleration-root-mean square; The acceleration-root-mean square of each circulation later increases the increment of 10Grms.The test period of each circulation is 143min; Since second temperature cycles, each vibration cycles finishes front 10min and carries out micro-vibration that acceleration-root-mean square is 5Grms, for detection of the faults such as rosin joint that inspire in high magnitude vibration.
Determine the frequency that applies apply the maximum amount value of pulsating current and pulsating current, the antiskid brake electric current of antiskid braking control box output 0mA～40mA, frequency of operation is 4 times/min.
The magnitude of voltage that each circulation applies, the mains fluctuations situation in simulation use, first circulation applies 31V voltage, second circulation applies 27V voltage, the 3rd circulation applies 23V voltage, and the 4th circulation applies 31V voltage, and the 5th circulation applies 27V voltage.Under above-mentioned input voltage condition, antiskid braking control box should be able to normally be worked.
According to above-mentioned definite parametric configuration antiskid braking control box integrated environment and the test profile of working current.
Step 8, tests according to test profile
The present invention carries out the test of 5 integrated environment Cyclic Stress altogether, when antiskid braking control box breaks down in process of the test, should correct the technological improvement of fault, then re-starts test, until do not break down in 5 circulations.Detailed process is:
Antiskid braking control box is arranged in Reliability Enhancement Testing case, antiskid braking control box adopts the moving-coil of the aluminium alloy vibration tong of the prior art shaking table built-in with chamber to be connected, and Reliability Enhancement Testing case seals by the rubber slab matching with shaking table.
Before on-test, on 5 outside surfaces of antiskid braking control box, respectively pasted 1 temperature sensor, and paste at the position near heating element; On 4 angles of antiskid braking control box upper cover, respectively paste 1 vibration transducer, for measuring temperature and the vibration value of process of the test, avoid occurring temperature or vibration overload.
By in the computing machine of integrated environment stress test section input Reliability Enhancement Testing case.
Close Reliability Enhancement Testing case chamber door, start Reliability Enhancement Testing case and start working, by test profile, antiskid braking control box is applied to integrated environment stress and working current, start test.
Antiskid braking control box carries out integrated environment stress test under the state of lid.
In process of the test, the electric current of antiskid braking control box output is 0mA～40mA, 4 times/min of frequency of operation.
I humid test process is: since 20 ℃, with the rate of temperature fall of 25 ℃/min, chamber temperature is down to-65 ℃, keeps 70min.If described antiskid braking control box breaks down, finish test, after being improved, its completing technology restarts test; If described antiskid braking control box does not break down, with the heating rate of 25 ℃/min, chamber temperature is risen to 95 ℃, keep 60min, wherein after 10min carry out performance test simultaneously.If described antiskid braking control box breaks down, finish test.This antiskid braking control box is carried out restarting test after technological improvement.If described antiskid braking control box does not break down, with the rate of temperature fall of 25 ℃/min, chamber temperature is down to-65 ℃.So far, complete one since 20 ℃ → cooling → low temperature → intensification → high temperature → cooling low/high temperature circulation process of the test.By above-mentioned low/high temperature circulation process of the test carry out temperature cycling test, circulate altogether 5 times;
The time of a vibration cycles is identical with the time of a described low/high temperature circulation;
The process of II vibration test is: the time of first vibration cycles is 143min, and wherein rear 10min carries out performance test; In first vibration cycles, vibrating set-point is 10Grms.
From second vibration cycles, each vibration cycles is divided into two stages: the time of vibration of first stage is 133min, and the vibration stress applying is 20Grms, and the vibration of first stage is used for exciting rosin joint potential faults; Second stage is micro-vibration, and micro-time of vibration is 10min, carries out performance test simultaneously, and the micro-vibratory output applying is 5Grms, and micro-vibration of subordinate phase is for manifesting the fault that this circulation first stage inspires.
The process of the test of the 3rd vibration cycles～five vibration cycles is identical with the process of the test of second circulation, but in each vibration cycles, the vibratory output of first stage all increases 10Grms on the basis of the first stage vibratory output of previous vibration cycles; In described the 3rd vibration cycles～five vibration cycles, the vibratory output of first stage respectively is 30Grms, 40Grms and 50Grms, and micro-vibratory output that second stage applies is 5Grms.
In the process of the test 5 circulations, when antiskid braking control box does not all break down, finish test; When breaking down in process of the test, should carry out technological improvement for fault, after improvement, restart test, until in the process of the test of 5 circulations non-fault.
The present embodiment antiskid braking control box in the process of the test of 5 circulations does not all break down, the technological improvement that proof is carried out for the fault inspiring in the marginal test of antiskid braking control box hot operation, low-temperature working marginal test, the test of vibration working limit, fast temperature variation test is resultful, improve the adaptive faculty of this antiskid braking control box under integrated environment and working current while applying condition, reached the checking object of test.
The invention allows for embodiment 2 and embodiment 3.
Described embodiment 2 and embodiment 3 are respectively the tests of integrated environment and the working current of other two kinds of civilian carrier antiskid braking control boxes, and the testing equipment adopting is identical with the testing equipment using in embodiment 1.
The process of embodiment 2 and embodiment 3 includes the height of determining integrated environment stress, low temperature numerical value, determine the rate temperature change of integrated environment stress, determine the vibration set-point of integrated environment stress and the vibration increment of each circulation, micro-vibration value and micro-time of vibration, determine the working current and the frequency of operation that in process of the test, apply, determine high temperature in test, the temperature hold-time of low thermophase, determine process of the test performance test duration and test event, formulate the test profile of complex working condition, according to test profile, test, antiskid braking control box after improving is carried out to each steps such as verification experimental verification.Its detailed process is identical with the process of embodiment 1, difference is that embodiment 2 is different from the test data of embodiment 1 with the test data in embodiment 3, specifically be shown in Table 4, the test period of embodiment 2 each vibration cycles is 129min, and the test period of embodiment 3 each vibration cycles is 117min.
Three embodiment integrated environment stress of table 4 and working current test profile major parameter summary sheet
Claims (4)
1. a method for antiskid braking control box fault under testing complex operating mode, is characterized in that, concrete steps are:
Step 1, determine the high temperature numerical value that applies integrated environment stress to antiskid braking control box: to antiskid braking control box apply the temperature of the high temperature numeric ratio hot operation limit of closing environmental stress low 5 ℃～10 ℃;
Step 2, determine the low temperature numerical value that applies integrated environment stress to antiskid braking control box: to antiskid braking control box apply the temperature of the low temperature numeric ratio low-temperature working limit of closing environmental stress high 5 ℃～10 ℃;
Step 3, determines the rate temperature change that applies integrated environment stress to antiskid braking control box: the rate temperature change applying is 25 ℃/min～55 ℃/min;
Step 4, determine the vibration increment of acceleration root-mean-square value in the initial set-point of acceleration root-mean-square value in vibration test and each circulation:
The vibration of integrated environment stress requires to comprise the initial set-point of acceleration root-mean-square value and the vibration increment of the acceleration root-mean-square value of each circulation from second circulation; The initial set-point of acceleration root-mean-square value of determining Reliability Enhancement Testing case in combined environment test is 8Grms～12Grms, and from second circulation, described in each circulation first stage, the increment of acceleration root-mean-square value is all identical with the acceleration root-mean-square value in first vibration cycles;
Step 5, determines the working current that in process of the test, antiskid braking control box is exported: the antiskid brake electric current of antiskid braking control box output 0mA～40mA; Frequency of operation is 4 times/min～12 time/min; And apply all the time working current in a test profile;
Step 6, determines the retention time of Reliability Enhancement Testing case maximum temperature and the retention time of minimum temperature
Step 7, determine the test profile that applies complex working condition:
Described complex working condition test profile refers to antiskid braking control box is applied with to temperature, vibration and working current simultaneously; In described complex working condition test profile: the frequency of vibration is 10～10000Hz, acceleration root-mean-square value maximum can reach 60Grms, and adopts the pseudorandom vibration of Triaxiality and six degrees of freedom;
Step 8, according to determined test profile, test:
The described process of testing according to determined test profile comprises the cyclic test of 5 complex working conditions; In process of the test, the electric current of antiskid braking control box output is 0mA～40mA, 4～12 times/min of frequency of operation;
I humid test:
Humid test process is: since 20 ℃, rate of temperature fall with 25 ℃/min～55 ℃/min is down to-65～-75 ℃ by chamber temperature, keep 60～70min, if described antiskid braking control box breaks down, finish test, this antiskid braking control box is carried out restarting test after technological improvement; If described antiskid braking control box does not break down, heating rate with 25 ℃/min～55 ℃/min rises to 95～125 ℃ by chamber temperature, keep 50～60min, wherein, 10min carries out performance test simultaneously, if described antiskid braking control box breaks down, finish test, this antiskid braking control box is carried out restarting test after technological improvement; If described antiskid braking control box does not break down, with the rate of temperature fall of 25 ℃/min～55 ℃/min, chamber temperature is down to-65 ℃; So far, complete one since 20 ℃ → cooling → low temperature → intensification → high temperature → cooling low/high temperature circulation process of the test; By above-mentioned low/high temperature circulation process of the test carry out temperature cycling test, circulate altogether 5 times;
II vibration test
The time of a vibration cycles is identical with the time of a described low/high temperature circulation;
The process of vibration test is: the rear 10min of first vibration cycles carries out performance test; Vibration set-point in first vibration cycles is 8Grms～12Grms;
From second vibration cycles, each vibration cycles is divided into two stages: the time of vibration of first stage is: the time of a low/high temperature circulation deducts 10min; In second vibration cycles, the increment of acceleration root-mean-square value is identical with the acceleration root-mean-square value in first circulation; Second stage is micro-vibration, and time of vibration is 10min, carries out performance test in micro-time of vibration simultaneously; Micro-vibration stress that second stage applies is 5Grms;
The process of the test of the 3rd vibration cycles～five vibration cycles is identical with the process of the test of second circulation; In described the 3rd vibration cycles～five vibration cycles, first stage acceleration root-mean-square value all increases on the basis of the first stage vibration value of previous vibration cycles, and the vibration increment of this acceleration root-mean-square value is all identical with the acceleration root-mean-square value in first vibration cycles; Micro-vibration acceleration root-mean-square value that in the 3rd vibration cycles～five vibration cycles, second stage applies is 5Grms;
The scope of high acceleration root-mean-square value is: 40Grms～60Grms;
In the process of the test in described 5 circulations, when antiskid braking control box does not all break down, finish test; When breaking down in process of the test, should carry out technological improvement for fault, after improvement, restart test, until in the process of the test of 5 circulations non-fault.
2. the method for antiskid braking control box fault under testing complex operating mode as claimed in claim 1, is characterized in that, test profile relates to definite following parameters:
Maximum temperature, the minimum temperature of test, temperature rate-of-rise, temperature fall off rate, the retention time of maximum temperature, the retention time of minimum temperature, temperature cycles number of times, the vibration cycles number of times of test, and the set-point of each vibration cycles, increment, maximum amount, micro-vibratory output and micro-time of vibration, apply the magnitude of voltage that frequency and each circulation apply that applies of the maximum amount value of pulsating current and pulsating current.
3. the method for antiskid braking control box fault under testing complex operating mode as claimed in claim 1, it is characterized in that, the magnitude of voltage that described each circulation applies is respectively: first circulation applies 31V voltage, second circulation applies 27V voltage, the 3rd circulation applies 23V voltage, the 4th circulation applies 31V voltage, and the 5th circulation applies 27V voltage.
4. the method for antiskid braking control box fault under testing complex operating mode as claimed in claim 1, it is characterized in that, in step 6, the retention time of described definite Reliability Enhancement Testing case maximum temperature is the duration that the environment temperature in Reliability Enhancement Testing case reaches after maximum temperature to be: the continuation heating-up time+antiskid braking control box of antiskid braking control box reaches the retention time+Performance Detection time after maximum temperature; The retention time of described minimum temperature is: the continuation temperature fall time+antiskid braking control box of antiskid braking control box reaches the retention time+Performance Detection time after minimum temperature.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054861A (en) * | 2016-06-14 | 2016-10-26 | 奇瑞汽车股份有限公司 | Vehicle body controller highly accelerated life test reliability test method and data acquisition system |
| CN108562447A (en) * | 2017-12-20 | 2018-09-21 | 西安航空制动科技有限公司 | A kind of design method of civil aircraft brake system combined environment test case |
| CN115200910A (en) * | 2022-06-22 | 2022-10-18 | 盐城工学院 | Equipment performance evaluation device based on electrical information |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103513647A (en) * | 2013-07-10 | 2014-01-15 | 西安航空制动科技有限公司 | Comprehensive environment stress test method of anti-sliding brake control box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103513647A (en) * | 2013-07-10 | 2014-01-15 | 西安航空制动科技有限公司 | Comprehensive environment stress test method of anti-sliding brake control box |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054861A (en) * | 2016-06-14 | 2016-10-26 | 奇瑞汽车股份有限公司 | Vehicle body controller highly accelerated life test reliability test method and data acquisition system |
| CN108562447A (en) * | 2017-12-20 | 2018-09-21 | 西安航空制动科技有限公司 | A kind of design method of civil aircraft brake system combined environment test case |
| CN115200910A (en) * | 2022-06-22 | 2022-10-18 | 盐城工学院 | Equipment performance evaluation device based on electrical information |
| CN115200910B (en) * | 2022-06-22 | 2023-10-10 | 盐城工学院 | Equipment performance evaluation device based on electrical information |
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Application publication date: 20141008 |