CN107505126A - A kind of airborne products flight test testability appraisal procedure - Google Patents

A kind of airborne products flight test testability appraisal procedure Download PDF

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Publication number
CN107505126A
CN107505126A CN201710653106.5A CN201710653106A CN107505126A CN 107505126 A CN107505126 A CN 107505126A CN 201710653106 A CN201710653106 A CN 201710653106A CN 107505126 A CN107505126 A CN 107505126A
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flight test
testability
mrow
airborne products
appraisal procedure
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CN107505126B (en
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郭丹
郝晓辉
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Xian Aircraft Design and Research Institute of AVIC
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Xian Aircraft Design and Research Institute of AVIC
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts

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Abstract

The invention discloses a kind of airborne products flight test testability appraisal procedure, belong to Aviation Test technical field of measurement and test.Flight test sample number N is obtained first, and diagnosis unsuccessfully counts c and testability index requires RL；And given confidence level C；Flight test smallest sample amount n is calculated according to formula afterwards, if flight test sample number N is more than or equal to flight test smallest sample amount n, flight test sample number N is substituted into the n in formula, backwards calculation obtains RLAs airborne products testability index assessed value, otherwise, airborne products testability index assessed value r assessment is carried out using the point estimation method.The flight test testability appraisal procedure that the present invention provides, the sample size that reasonable is provided for field testing assessment determine method and confidential interval index evaluating method, being capable of truer objective assessment airborne products flight test testability level.

Description

A kind of airborne products flight test testability appraisal procedure
Technical field
The invention belongs to Aviation Test technical field of measurement and test, and in particular to a kind of airborne products flight test testability is assessed Method.
Background technology
Airborne products flight test testability assesses the fault diagnosis event for referring to in-flight occur by collecting statistics, and The process of testability index assessment is carried out according to certain appraisal procedure.
In the past, each model airborne products flight test testability appraisal procedure was using the smallest sample in GJB2072 Measure the index evaluating method for 30 and point estimation.The assessment result that point estimation appraisal procedure provides is explicit value, but with airborne production The testability index true value of product certainly exists deviation, and therefore, point estimation appraisal procedure is too absolute, it is impossible to objectively responds airborne Product test is horizontal.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of airborne products flight test testability appraisal procedure, mainly Comprise the following steps：
Step 1: obtaining flight test sample number N, diagnosis unsuccessfully counts c and testability index requires RL；
Step 2: given confidence level C；
Step 3: calculating flight test smallest sample amount n according to formula, the formula is：
Step 4: if flight test sample number N is more than or equal to flight test smallest sample amount n, by flight test sample The n in formula in this number N alternative steps three, and confidence level C and diagnosis are unsuccessfully counted into c as input, R is calculatedLMake For airborne products testability index assessed value, otherwise, assessed using the point estimation method, it is described to be carried out using the point estimation method Assess and obtain airborne products testability index assessed value r formula and be：
Wherein, M1It is the number of faults detected, M2It is failure sum.
Preferably, the airborne products flight test testability, which is assessed, includes calculating fault detect rate, Percent Isolated And the testability index assessed value of false alarm rate.
Preferably, in the step 4, for calculating fault detect rate, M1Refer to that the method as defined in is correctly examined The number of faults measured, M2It is failure sum.
Preferably, in the step 4, for calculating Percent Isolated, M1Refer to defined method correctly every From the number of faults to the LRU less than or equal to ambiguity group, M2Refer to the failure that the method as defined in is correctly detecting Number.
Preferably, in the step 4, for calculating false alarm rate, M1Refer to the false-alarm number occurred, M2Refer to same The sum of time internal fault instruction.
The flight test testability appraisal procedure that the present invention provides, the sample for providing reasonable is assessed for field testing This amount determines method and confidential interval index evaluating method, being capable of truer objective assessment airborne products flight test testability It is horizontal.
Brief description of the drawings
Fig. 1 is the flow chart according to a preferred embodiment of airborne products flight test testability appraisal procedure of the present invention.
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class As label represent same or similar element or the element with same or like function.Described embodiment is the present invention Part of the embodiment, rather than whole embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Under Embodiments of the invention are described in detail with reference to accompanying drawing for face.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on accompanying drawing institutes The orientation or position relationship shown, it is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected The limitation of scope.
It should be a probabilistic event that flight test testability, which is assessed, should use method of interval estimation.Therefore, in order to objective It is horizontal to evaluate airborne products flight test testability, formulates method of interval estimation is very urgent how necessary.
Airborne products flight test testability appraisal procedure of the present invention, as shown in figure 1, mainly including the following steps that：
Step 1: obtaining flight test sample number N, diagnosis unsuccessfully counts c and testability index requires RL；
Step 2: given confidence level C；
Step 3: calculating flight test smallest sample amount n according to formula, the formula is：
It is understood that i is natural number here；
Step 4: if flight test sample number N is more than or equal to flight test smallest sample amount n, by flight test sample The n in formula in this number N alternative steps three, and confidence level C and diagnosis are unsuccessfully counted into c as input, R is calculatedLMake For airborne products testability index assessed value, otherwise, assessed using the point estimation method, it is described to be carried out using the point estimation method Assess and obtain airborne products testability index assessed value r formula and be：
Wherein, M1It is the number of faults detected, M2It is failure sum.
In the present invention, the airborne products flight test testability, which is assessed, to be included calculating fault detect rate, Percent Isolated And the testability index assessed value of false alarm rate.Therefore, for calculating fault detect rate, M1Refer to correct with defined method The number of faults detected, M2It is failure sum.For calculating Percent Isolated, M1Refer to that the method as defined in is correctly isolated To the number of faults of the LRU less than or equal to ambiguity group, M2Refer to the failure that the method as defined in is correctly detecting Number.For calculating false alarm rate, M1Refer to the false-alarm number occurred, M2Refer to the sum of same time internal fault instruction.
It should be noted that in step 1, tried the fault diagnosis total number of events counted in flight test as flight Test sample number N, such as fault detect test sample number N1, Fault Isolation Test sample number N2, false-alarm test sample number N3.It will fly The fault diagnosis turkey sum counted in row experiment unsuccessfully counts c, such as fault detect failure test sample number as diagnosis C1, Fault Isolation failure test sample number c2, false-alarm failure test sample number c3.By the test in airborne products testbility demand Property index it is minimum can reception value as RL。
In above-described embodiment, N, c, M1、M2It is field trial statistics.
One specific example is as follows：
Using the fault diagnosis total number of events 65 counted in flight test as flight test sample number N.
C is unsuccessfully counted using the fault diagnosis turkey counted in flight test sum 1 as diagnosis.
Using the testability index in airborne products testbility demand it is minimum can reception value 0.95 as RL。
Under conditions of given confidence level C=0.8, n=59 is calculated according to the formula of formula step 3, as flight Test smallest sample amount.
Because N=65 is more than n=59, airborne products testability index assessed value is calculated according to the formula in step 3 RL=95.46%.It should be noted that in the present embodiment, passing point assesses the assessed value r calculated with passing through above-described embodiment meter The assessed value R of calculationLRefer both to airborne products testability index.
The flight test testability appraisal procedure that the present invention provides, the sample for providing reasonable is assessed for field testing This amount determines method and confidential interval index evaluating method, being capable of truer objective assessment airborne products flight test testability It is horizontal.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent The present invention is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：It is still Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical scheme God and scope.

Claims (5)

  1. A kind of 1. airborne products flight test testability appraisal procedure, it is characterised in that including：
    Step 1: obtaining flight test sample number N, diagnosis unsuccessfully counts c and testability index requires RL；
    Step 2: given confidence level C；
    Step 3: calculating flight test smallest sample amount n according to formula, the formula is：
    <mrow> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>0</mn> </mrow> <mi>c</mi> </munderover> <mfenced open = "(" close = ")"> <mtable> <mtr> <mtd> <mi>n</mi> </mtd> </mtr> <mtr> <mtd> <mi>i</mi> </mtd> </mtr> </mtable> </mfenced> <msup> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <msub> <mi>R</mi> <mi>L</mi> </msub> <mo>)</mo> </mrow> <mi>i</mi> </msup> <msubsup> <mi>R</mi> <mi>L</mi> <mrow> <mi>n</mi> <mo>-</mo> <mi>i</mi> </mrow> </msubsup> <mo>=</mo> <mn>1</mn> <mo>-</mo> <mi>C</mi> <mo>;</mo> </mrow>
    Step 4: if flight test sample number N is more than or equal to flight test smallest sample amount n, by flight test sample number N The n in formula in alternative steps three, and confidence level C and diagnosis are unsuccessfully counted into c as input, R is calculatedLAs airborne Product test index evaluation value, otherwise, is assessed using the point estimation method, described using the point estimation method assess Formula to airborne products testability index assessed value r is：
    <mrow> <mi>r</mi> <mo>=</mo> <mfrac> <msub> <mi>M</mi> <mn>1</mn> </msub> <msub> <mi>M</mi> <mn>2</mn> </msub> </mfrac> <mo>&amp;times;</mo> <mn>100</mn> <mi>%</mi> </mrow>
    Wherein, M1It is the number of faults detected, M2It is failure sum.
  2. 2. airborne products flight test testability appraisal procedure as claimed in claim 1, it is characterised in that the airborne products Flight test testability assesses the testability index assessed value for including calculating fault detect rate, Percent Isolated and false alarm rate.
  3. 3. airborne products flight test testability appraisal procedure as claimed in claim 2, it is characterised in that the step 4 In, for calculating fault detect rate, M1Refer to the number of faults that the method as defined in is correctly detecting, M2It is failure sum.
  4. 4. airborne products flight test testability appraisal procedure as claimed in claim 2, it is characterised in that the step 4 In, for calculating Percent Isolated, M1Refer to that the outfield that the method as defined in is correctly isolated less than or equal to ambiguity group can Change the number of faults of unit, M2Refer to the number of faults that the method as defined in is correctly detecting.
  5. 5. airborne products flight test testability appraisal procedure as claimed in claim 2, it is characterised in that the step 4 In, for calculating false alarm rate, M1Refer to the false-alarm number occurred, M2Refer to the sum of same time internal fault instruction.
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CN111651853A (en) * 2020-04-14 2020-09-11 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）） Evaluation method for comprehensive diagnosis capability of product fault
CN111898924A (en) * 2020-08-13 2020-11-06 中国人民解放军海军航空大学 Comprehensive evaluation method and system for testability use of equipment
CN114036450A (en) * 2021-10-25 2022-02-11 中国电子科技集团公司第二十九研究所 Method for quickly assessing testability indexes of electronic information equipment and storage medium

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CN111651853A (en) * 2020-04-14 2020-09-11 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）） Evaluation method for comprehensive diagnosis capability of product fault
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CN111898924A (en) * 2020-08-13 2020-11-06 中国人民解放军海军航空大学 Comprehensive evaluation method and system for testability use of equipment
CN114036450A (en) * 2021-10-25 2022-02-11 中国电子科技集团公司第二十九研究所 Method for quickly assessing testability indexes of electronic information equipment and storage medium

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