CN102494695A - High-efficiency MTBF (Mean Time Between Failures) proof test method applied to ship navigation product - Google Patents
High-efficiency MTBF (Mean Time Between Failures) proof test method applied to ship navigation product Download PDFInfo
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- CN102494695A CN102494695A CN201110343575XA CN201110343575A CN102494695A CN 102494695 A CN102494695 A CN 102494695A CN 201110343575X A CN201110343575X A CN 201110343575XA CN 201110343575 A CN201110343575 A CN 201110343575A CN 102494695 A CN102494695 A CN 102494695A
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Abstract
The invention relates to a high-efficiency MTBF (Mean Time Between Failures) proof test method applied to a ship navigation product, which comprises the following steps of: (1), determining test time; (2) determining environmental parameters; (3) determining a test section; and (4) determining test passing criterion. The method disclosed by the invention is a reliable acceptance test method, which is particularly applied to being used by the navigation product; a test program can be simplified by adopting the test method disclosed by the invention; the test time is shortened to r=(0.148-0.212)M from r=(1.1-45)M; the test time is greatly reduced; furthermore, the test section is greatly simplified; the development cycle can be greatly shortened; and a lot of test funds and resources, such as manpower, material and the like, can be saved.
Description
Technical field
The present invention relates to the reliability professional skill field, especially a kind of method to System in Small Sample Situation, high reliability reliability of products reception test.
Background technology
The method of Demonstration Reliability Acceptance Test is a lot; Like GB 5058.7-86 " equipment dependability is tested the demonstration test scheme of constant crash rate hypothesis crash rate down and average non-fault test period " adopting by equation IEC 605.7-1978 " equipment dependability is tested the 7th part: the constant crash rate hypothesis crash rate and the average demonstration test scheme of non-fault test period down ", this standard code 10 sequential trials schemes, 10 timings (fixed number) testing program.GJB899A-2009 " reliability identify and reception test " has stipulated 21 Demonstration Reliability Acceptance Test schemes in this standard, wherein 8 sequential trials statistical projects and 12 fixed time test statistical projects and total test statistics scheme.Except that having stipulated 21 statistical test schemes of GJB899A-2009 " reliability is identified and reception test ", also has MTBF (mean time between failures) warranty test scheme among the MIL-HBDK-781A:1996 " engineering, development, qualification and production are with reliability test method, scheme and environment ".
The ship navigation product mainly refers to instruments such as inertial navigation system, radio navigation aids, log, magnetic compass, platform compass, electrostatically supported gyro monitor; Because navigation product has characteristics such as System in Small Sample Situation, high reliability; Its test period minimum acceptable value is generally (1200～3000) h; Though more than enumerated the standard of present domestic and international many related reliability reception tests, because test period is generally (1.1～45) minimum acceptable value doubly, even navigation product adopts the above-mentioned testing program of excessive risk in short-term; Test period is also wanted the minimum acceptable value of 1.1 times (r=1.1M); Therefore use existing test acceptance method process of the test very complicated, step many, need cost huge human and material resources and test period, be difficult to bear for this series products of navigation product.
Summary of the invention
The object of the present invention is to provide a kind of reasonable in designly, flow process is simple, can shorten test period, improve the MTBF warranty test method that the suitable navigation product of test efficiency uses.
The objective of the invention is to realize like this:
A kind of efficient MTBF warranty test method that is applicable to the ship navigation product is characterized in that: may further comprise the steps: (1) confirmed test time; (2) confirm environmental parameter; (3) confirmed test section; (4) criterion is passed through in confirmed test.
And the described test period of step (1) is r～2r, wherein r=0.212M (P
S=0.98) or r=0.148M (P
S=0.99), in the formula:
R---non-fault numerical value at interval, unit is hour (h);
M---the numerical value of the minimum acceptable value of navigation product MTBF, unit are hour (h);
P
S---through the probable value of MTBF warranty test.
And the described environmental parameter of step (2) comprises voltage stress, temperature stress, humidity stress and vibration stress.
And, described voltage stress press the input voltage nominal value ± 10% change, the upper limit of WV, lower limit respectively account for the time of working cycle 25%, nominal voltage accounts for the time of working cycle 50%, and under the uniform temp condition, has different voltages with different.
And described temperature stress comprises cold soaking, hot dipping and temperature cycles, cold soaking :-(40～50) ℃, and the cold soaking temperature of some navigation product can be brought up to 5 ℃, hot dipping: (45～65) ℃, temperature cycles: (10～5) ℃～(35～50) ℃; Described humidity stress is: relative humidity: (25～95) %, temperature: (22～50) ℃; Cold soaking and hot dipping are carried out in first three circulation of test, are later on the high and low temperature working cycle.
And; Described vibration stress is in working cycle, randomly draws 25% working cycle and applies vibration stress, and each vibration cycles is 3h; Each vibration cycles applies fight earlier and damages frequency spectrum 10min; In all the other times, apply the transportation random frequency spectrum then, every vibration 20min failure of oscillation 10min is up to 3h.
A) apply when fight damages frequency spectrum and should carry out the logarithm sine sweep by following provisions:
1) frequency range: (5～60) Hz;
2) amplitude: (5～15) Hz is (0.76 ± 0.15) mm, and (15～60) Hz is 7.5m/s
2
3) duration: (10 ± 2) min (going up 5min, following 5min);
Should carry out random vibration by following provisions when b) applying the transportation random frequency spectrum:
1) frequency range: (10～200) Hz;
2) magnitude (total root-mean-square value r.m.s): 10m/s
2
3) duration: 20min.
And before temperature cycles, concentrate and do linear sine sweep vibration: frequency range (5～55) Hz, peak swing 55Hz is 60m/s
2, frequency sweep time (10 ± 2) min, every axially accumulative total time of vibration is no less than 2h, and vibrating shaft is stipulated by product specification to number.
And described step (3) is the combined stress of bearing according under the ship navigation product environment for use, designs the test profile of MTBF warranty test with reference to the test profile of GJB899A-2009.
And the described confirmed test of step (4) through criterion is: under the environmental stress conditions that navigation product is being simulated, failure-free operation reaches the non-fault interval r of regulation, and then product is through the MTBF warranty test; In test, break down, abort is repaired fault, can continue test, if at 2r test observation time memory at non-fault r at interval, then through the MTBF warranty test; Otherwise, not through the MTBF warranty test.
Advantage of the present invention and good effect are:
1, this test method is very simple, and test procedure was reduced to for four steps by original 13 steps can reach the purpose that test is checked and accepted, therefore improved operation convenience, shortened cycle of test.
When 2, making an experiment according to this test method, test period is r=0.212M or r=0.148M, compare with traditional experiment, test period produced significantly reduce, test efficiency is greatly improved.
3, the test profile of this test method is simplified greatly, has saved resources such as lot of test funds and human and material resources, is a kind of reception test method that has economic benefit.
4, method of the present invention is compared than prior art (GB 5058.7-86 " equipment dependability is tested the demonstration test scheme of constant crash rate hypothesis crash rate down and average non-fault test period ", IEC 605.7-1978 " equipment dependability is tested the 7th part: the crash rate under the constant crash rate hypothesis and the average demonstration test scheme of non-fault test period ", GJB899A-2009 " reliability evaluation and reception test ", MIL-HBDK-781A:1996 " engineering, development, qualification and production are with reliability test method, scheme and environment "); Simplified test routine; Test period shortens to r=(0.148～0.212) M by r=(1.1～45) M; Significantly reduced test period; And test profile is simplified greatly; Can greatly shorten the lead time; Saving resources such as lot of test funds and human and material resources, is a kind of Demonstration Reliability Acceptance Test method that has economic benefit and be particularly suitable for the navigation product use.
Description of drawings
Fig. 1 is experiment process figure of the present invention;
Fig. 2 is the transportation random frequency spectrum;
Fig. 3 is a test profile map.
Embodiment
Be described in detail embodiments of the invention below in conjunction with accompanying drawing; Need to prove that present embodiment is narrative, is not determinate, can not limit protection scope of the present invention with this.
A kind of efficient MTBF warranty test method that is applicable to the ship navigation product may further comprise the steps: (1) confirmed test time:
Test period is r～2r, wherein r=0.212M (P
S=0.98) or r=0.148M (P
S=0.99), in the formula:
R---non-fault numerical value at interval, unit is hour (h);
M---the numerical value of the minimum acceptable value of navigation product MTBF, unit are hour (h);
P
S---through the probable value of MTBF warranty test.
The test period of warranty test is confirmed by formula (1) usually.When the high reliability product testing that is difficult to bear for a long time, also can be by formula (2) the confirmed test time.
(2) confirm environmental parameter:
Described environmental parameter comprises voltage stress, temperature stress, humidity stress and vibration stress.
1. voltage stress is pressed input voltage nominal value ± 10% variation, and the upper limit of WV, lower limit respectively account for the time of working cycle 25%, and nominal voltage accounts for the time of working cycle 50%.Dust cycle is generally the common divisor of 24h, and the circulation of electric stress circulates in a dust cycle usually, when a lot of as if testing cycle, can stride testing cycle, with the frequent change of minimizing voltage, and under the uniform temp condition, has different voltages with different.
2. temperature stress comprises cold soaking, hot dipping and temperature cycles, cold soaking :-(40～50) ℃ (the cold soaking temperature of some navigation product can be brought up to 5 ℃); Hot dipping: (45～65) ℃; Temperature cycles: (10～5) ℃～(35～50) ℃.Cold soaking and hot dipping are carried out in first three circulation of test, are later on the high and low temperature working cycle.
3. humidity stress: humidity stress applies as requested, and humidity changes with temperature, needn't keep humidity constant, relative humidity: (25～95) %, temperature: (22～50) ℃.
4. vibration stress: in working cycle, randomly draw 25% working cycle and apply vibration stress, each vibration cycles is 3h; Each vibration cycles applies fight earlier and damages frequency spectrum 10min; In all the other times, apply the transportation random frequency spectrum then, every vibration 20min failure of oscillation 10min is up to 3h.
A) apply when fight damages frequency spectrum and should carry out the logarithm sine sweep by following provisions:
1) frequency range: (5～60) Hz;
2) amplitude: (5～15) Hz is (0.76 ± 0.15) mm, and (15～60) Hz is 7.5m/s
2, low frequency
Section control amplitude, high band control control acceleration;
3) duration: (10 ± 2) min (going up 5min, following 5min).
Should carry out random vibration by following provisions when b) applying the transportation random frequency spectrum:
1) frequency range: (10～200) Hz;
2) magnitude (total root-mean-square value r.m.s): 10m/s
2
3) duration: 20min.
Some navigation product can be before temperature cycles, and concentrate and do linear sine sweep vibration: frequency range (5～55) Hz, peak swing 55Hz is 60m/s
2, frequency sweep time (10 ± 2) min, every axially accumulative total time of vibration is no less than 2h, and vibrating shaft is stipulated by product specification to number.
(3) confirmed test section:
According to the combined stress of bearing under the ship navigation product environment for use, design the test profile of MTBF warranty test with reference to the test profile of GJB899A-2009.
(4) criterion is passed through in confirmed test:
Under the environmental stress conditions that navigation product is being simulated, failure-free operation reaches the non-fault interval r of regulation, and then product is through the MTBF warranty test; In test, break down, abort is repaired fault, can continue test, if at 2r test observation time memory at non-fault r at interval, then through the MTBF warranty test; Otherwise, not through the MTBF warranty test.
Claims (10)
1. an efficient MTBF warranty test method that is applicable to the ship navigation product is characterized in that: may further comprise the steps: (1) confirmed test time; (2) confirm environmental parameter; (3) confirmed test section; (4) criterion is passed through in confirmed test.
2. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 1, it is characterized in that: the described test period of step (1) is r～2r, wherein r=0.212M (P
S=0.98) or r=0.148M (P
S=0.99), in the formula:
R---non-fault numerical value at interval, unit is hour (h);
M---the numerical value of the minimum acceptable value of navigation product MTBF, unit are hour (h);
P
S---through the probable value of MTBF warranty test.
3. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 1, it is characterized in that: the described environmental parameter of step (2) comprises voltage stress, temperature stress, humidity stress and vibration stress.
4. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 3; It is characterized in that: described voltage stress press the input voltage nominal value ± 10% change; The upper limit of WV, lower limit respectively account for the time of working cycle 25%; Nominal voltage accounts for the time of working cycle 50%, and under the uniform temp condition, has different voltages with different.
5. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 3; It is characterized in that: described temperature stress comprises cold soaking, hot dipping and temperature cycles; Cold soaking :-(40～50) ℃; The cold soaking temperature of some navigation product can be brought up to 5 ℃, hot dipping: (45～65) ℃, temperature cycles: (10～5) ℃～(35～50) ℃; Described humidity stress is: relative humidity: (25～95) %, temperature: (22～50) ℃; Cold soaking and hot dipping are carried out in first three circulation of test, are later on the high and low temperature working cycle.
6. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 3; It is characterized in that: described vibration stress is in working cycle, randomly draws 25% working cycle and applies vibration stress, and each vibration cycles is 3h; Each vibration cycles applies fight earlier and damages frequency spectrum 10min; In all the other times, apply the transportation random frequency spectrum then, every vibration 20min failure of oscillation 10min is up to 3h.
7. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 6 is characterized in that:
A) apply when fight damages frequency spectrum and should carry out the logarithm sine sweep by following provisions:
1) frequency range: (5～60) Hz;
2) amplitude: (5～15) Hz is (0.76 ± 0.15) mm, and (15～60) Hz is 7.5m/s
2
3) duration: (10 ± 2) min (going up 5min, following 5min);
Should carry out random vibration by following provisions when b) applying the transportation random frequency spectrum:
1) frequency range: (10～200) Hz;
2) magnitude (total root-mean-square value r.m.s): 10m/s
2
3) duration: 20min.
8. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 1 is characterized in that: before temperature cycles, concentrate and do linear sine sweep vibration: frequency range (5～55) Hz, peak swing 55Hz is 60m/s
2, frequency sweep time (10 ± 2) min, every axially accumulative total time of vibration is no less than 2h, and vibrating shaft is stipulated by product specification to number.
9. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 1; It is characterized in that: described step (3) is the combined stress of bearing according under the ship navigation product environment for use, designs the test profile of MTBF warranty test with reference to the test profile of GJB899A-2009.
10. a kind of efficient MTBF warranty test method that is applicable to the ship navigation product according to claim 1; It is characterized in that: the described confirmed test of step (4) through criterion is: under the environmental stress conditions that navigation product is being simulated; Failure-free operation reaches the non-fault interval r of regulation, and then product is through the MTBF warranty test; In test, break down, abort is repaired fault, can continue test, if at 2r test observation time memory at non-fault r at interval, then through the MTBF warranty test; Otherwise, not through the MTBF warranty test.
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| CN104154933A (en) * | 2014-08-14 | 2014-11-19 | 北京航天控制仪器研究所 | Vibration fatigue theory based method for analyzing failure mode of inertia measurement system |
| CN104597389A (en) * | 2014-12-23 | 2015-05-06 | 北京自动测试技术研究所 | Quick evaluation method for plastic encapsulated integrated circuit reliability under marine environment condition |
| CN106681296A (en) * | 2015-11-05 | 2017-05-17 | 株洲南车时代电气股份有限公司 | Train running monitoring record device host reliability test method |
| 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 |
| CN109059988A (en) * | 2018-07-06 | 2018-12-21 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Photoelectric Detection instrument reliability estimation method and device |
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| CN110261143A (en) * | 2019-07-10 | 2019-09-20 | 中车株洲电力机车有限公司 | Reliability test method and system under the online operation condition of medium-and low-speed maglev train |
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| CN111811539A (en) * | 2020-07-14 | 2020-10-23 | 湖南中大检测技术集团有限公司 | Hydraulic hydrostatic level precision test experiment platform |
| CN111811539B (en) * | 2020-07-14 | 2022-06-21 | 中大检测(湖南)股份有限公司 | Hydraulic hydrostatic level precision test experiment platform |
| CN111947703A (en) * | 2020-08-10 | 2020-11-17 | 中国电子科技集团公司第四十九研究所 | Sensor service life obtaining method based on dual-stress accelerated storage test |
| CN114088117A (en) * | 2021-11-30 | 2022-02-25 | 中国兵器工业集团第二一四研究所苏州研发中心 | Method for evaluating reliability of MEMS (micro-electromechanical system) inertial device under complex working conditions |
| WO2024109081A1 (en) * | 2022-11-25 | 2024-05-30 | 沈阳铁路信号有限责任公司 | Reliability test method based on solid-state relay |
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Application publication date: 20120613 |