CN103996103A - Electronic system reliability allocation method and device for balancing requirements of both supply party and demand party - Google Patents

Abstract

The invention discloses an electronic system reliability allocation method and device for balancing requirements of both a supply party and a demand party. The electronic system reliability allocation method comprises the steps that electronic system reliability index requirements are determined clearly; for each single device of a system, grading results obtained through reliability allocation grading carried out by both the supply party and the demand party according to preset grading factors are received, reliability allocation is carried out on the basis of the electronic system reliability index requirements and the grading result of the supply party and on the basis of the electronic system reliability index requirements and the grading result of the demand party, and a reliability allocation result of the supply party and a reliability allocation result of the demand party are obtained specific to each single device; weighting is carried out on the basis of the reliability allocation result of the supply party and the reliability allocation result of the demand party, and the final reliability allocation result specific to each single device is obtained. According to the electronic system reliability allocation method and device for balancing the requirements of both the supply party and the demand party, on the premise of guaranteeing that the overall reliability index of the system is met, different considerations of the supply party and the demand party are synthesized, and efficiency of the electronic system is improved.

Description

Electronic system reliability allocation methods and device that balance supply and demand both sides require

Technical field

The present invention relates to electronic system Reliability Distribution technical field, relate in particular to electronic system reliability allocation methods and device that a kind of balance supply and demand both sides require.

Background technology

In the process of the new system of exploitation, the requirement that system is completed to particular task probability is quantitatively fiduciary level, crash rate or unreliable degree index conventionally.The fiduciary level of system requires general by Reliability Distribution technical point dispensing next stage working cell (as: unit).In the primary stage of scheme Design, the unit of system composition is still not clear conventionally, can supposing the system be generally now cascaded structure, and carries out Reliability Distribution based on scoring apportion design.Afterwards, by calculating the reliability scoring of each unit, determine assigning weight of each unit.Finally, based on assigning weight, the reliability requirement of system is distributed to each unit.

For a system, the working time of its composition unit is different conventionally.For supplier, the longer working time means higher failure risk, thereby tends to lower RELIABILITY INDEX to distribute to the unit that the working time grows.Current conventional scoring apportion design (Zeng Shengkui. reliability design and analysis [M], Beijing: National Defense Industry Press, 2011), from supplier's angle, for the unit that the working time is grown, divide higher its task time just.

In some applications, scoring distribution method exposes its weak point gradually, and it only carries out RELIABILITY INDEX distribution from the angle of supplier's realizability.From the angle of party in request, the longer working time may mean that this unit, by usefulness larger performance, produces more benefit in whole system, thereby more needs to guarantee its normal work (possessing higher RELIABILITY INDEX).But the demand of party in request's this respect often can not be guaranteed because it does not participate in System Reliability Assignment, finally may cause overall system reliability index to meet the demands but the usefulness (benefit) that produces does not meet the expection of party in request.

Summary of the invention

In view of above-mentioned analysis, the present invention aims to provide electronic system reliability allocation methods and the device that a kind of balance supply and demand both sides require, in order to only to solve the lower problem of efficiency ratio of distributing the electronic system of bringing to produce of unilaterally marking from supplier.

Object of the present invention is mainly achieved through the following technical solutions:

The invention provides the electronic system reliability allocation methods that a kind of balance supply and demand both sides require, comprising:

Specify the requirement of electronic system reliability index;

For each unit of system, receive supply and demand both sides carry out respectively Reliability Distribution scoring appraisal result according to predetermined evaluation factor, and based on electronic system reliability index require and supply and demand both sides separately appraisal result carry out respectively Reliability Distribution, obtain the Reliability Distribution result separately for the supply and demand both sides of this unit;

Be weighted processing based on supply and demand both sides Reliability Distribution result separately, obtain the final Reliability Distribution result for this unit.

Further, above-mentioned electronic system reliability index requires to adopt following form to determine:

R _S(T)＝r

Wherein, R _s() is reliability models or reliability function, and T is the system task time, and r is electronic system reliability index.

Further, supply and demand both sides carry out respectively Reliability Distribution based on scoring, obtain specifically comprising for the process of the supply and demand both sides of this unit Reliability Distribution result separately:

Receive the scoring of the evaluation factor of supply and demand both sides to each unit, be handled as follows for supply and demand both sides respectively:

Calculate the each evaluation factor average of each unit;

According to the evaluation score of this each evaluation factor of unit, calculate the comprehensive grading of this unit;

According to the comprehensive grading of this unit, calculate the comprehensive grading of whole system;

According to the comprehensive grading of the comprehensive grading of this unit and whole system, calculate the comprehensive grading factor of this unit;

According to the comprehensive grading factor of this unit and electronic system reliability index, calculate the Reliability Distribution result for this unit.

Further, supply and demand both sides comprise multiple in following factor for the evaluation factor of each unit:

Prominence score, complicacy scoring, maturity scoring, working environment scoring, scoring task time.

Further, the system of setting up departments is made up of n platform unit, has above-mentioned 5 evaluation factors, by L position supplier expert, the evaluation factor of each unit is marked; If supplier aspect, j expert is S to the prominence score of unit i _sij1, complicacy scoring is S _sij2, maturity scoring is S _sij3, working environment scoring S _sij4, scoring task time is S _sij5, the average score of k evaluation factor of unit i is:

$S_{\mathrm{sik}}=\frac{1}{L}\underset{j=1}{\overset{L}{\mathrm{\Σ}}}{S}_{\mathrm{sijk}}$

The comprehensive grading of i platform unit is:

$S_{\mathrm{si}}=\underset{k=1}{\overset{5}{\mathrm{\Π}}}{S}_{\mathrm{sik}}$

The comprehensive grading of whole system is:

$S_s=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_{\mathrm{si}}$

The comprehensive grading factor of i platform unit is:

$C_{\mathrm{si}}=\frac{S_{\mathrm{si}}}{S_s}$

According to the comprehensive grading factor of i platform unit, it distributes fiduciary level to be thereby have:

$\begin{array}{c}{R}_i\left(t_i\right)=e^{-{\mathrm{\λ}}_i^{\text{'}}{t}_i}=r^{C_{\mathrm{ci}}}={\left(e^{{-\mathrm{\λ}}_{S}T}\right)}^{C_{\mathrm{ci}}}=e^{-C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T}\\ \⇒{\mathrm{\λ}}_i^{\text{'}}{t}_i=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T\⇒{\mathrm{\λ}}_i^{\text{'}}=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T/t_i\end{array}$

Wherein, R _i() is the reliability function of unit i, λ _i, t _ibe respectively distribution crash rate and the task time of unit i, λ _sfor system failure rate.

Further, the system of setting up departments is made up of n platform unit, has above-mentioned 5 evaluation factors, and by Q position, the expert of party in request marks to the evaluation factor of each unit; If party in request aspect, j expert is S to the prominence score of unit i _cij1, complicacy scoring is S _cij2, maturity scoring is S _cij3, working environment scoring S _cij4, scoring task time is S _cij5, the average score of k evaluation factor of unit i is:

$S_{\mathrm{cik}}=\frac{1}{Q}\underset{j=1}{\overset{Q}{\mathrm{\Σ}}}{S}_{\mathrm{cijk}}$

The comprehensive grading of i platform unit is:

$S_{\mathrm{ci}}=\underset{k=1}{\overset{5}{\mathrm{\Π}}}{S}_{\mathrm{cik}}$

The comprehensive grading of whole system is:

$S_c=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_{\mathrm{ci}}$

The comprehensive grading factor of i platform unit is:

$C_{\mathrm{ci}}=\frac{S_{\mathrm{ci}}}{S_c}$

According to the comprehensive grading factor of i platform unit, it distributes fiduciary level to be thereby have:

$\begin{array}{c}{R}_i\left(t_i\right)=e^{-{\mathrm{\λ}}_i^{\text{'}}{t}_i}=r^{C_{\mathrm{ci}}}={\left(e^{{-\mathrm{\λ}}_{S}T}\right)}^{C_{\mathrm{ci}}}=e^{-C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T}\\ \⇒{\mathrm{\λ}}_i^{\text{'}}{t}_i=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T\⇒{\mathrm{\λ}}_i^{\text{'}}=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T/t_i\end{array}$

Wherein, R _i() is the reliability function of unit i, λ _i', t _ibe respectively distribution crash rate and the task time of unit i, λ _sfor system failure rate.

Further, based on supply and demand both sides Reliability Distribution result λ separately _iand λ _i' and predetermined weight factor W be weighted processing, and jointly confirm by both party, obtain for the final Reliability Distribution result of this unit; The span of described weight factor W is 0≤W≤1.

Further, be weighted processing based on supply and demand both sides Reliability Distribution result separately, acquisition specifically comprises for the process of the final Reliability Distribution result of this unit:

$\begin{array}{c}{R}_i\left(t_i\right)=r^{C_{\mathrm{si}}\·W}\·r^{C_{\mathrm{ci}}\·(1-W)}\\ \⇒e^{-{\mathrm{\λ}}_{\mathrm{if}}{t}_i}={\left(e^{-{\mathrm{\λ}}_{S}T}\right)}^{C_{\mathrm{si}}\·W}\·{\left(e^{-{\mathrm{\λ}}_{S}T}\right)}^{C_{\mathrm{Ci}}\·(1-W)}=e^{-[C_{\mathrm{si}}W{\mathrm{\λ}}_{S}T+C_{\mathrm{ci}}(1-W){\mathrm{\λ}}_{S}T]}\\ \⇒{\mathrm{\λ}}_{\mathrm{if}}=C_{\mathrm{si}}W{\mathrm{\λ}}_{S}T/t_i+C_{\mathrm{ci}}(1-W){\mathrm{\λ}}_{S}T/t_i=[C_{\mathrm{si}}W+C_{\mathrm{ci}}(1-W)]{\mathrm{\λ}}_{S}T/t_i\\ =W\·{\mathrm{\λ}}_i+(1-W){\mathrm{\λ}}_i^{\text{'}}\end{array}$

Wherein, R _i(t _i) the final distribution fiduciary level of expression unit i, represent that supply and demand side distributes fiduciary level, represent that party in request distributes fiduciary level, T represents system task time, λ _iffor the final Reliability Distribution result of unit i.

The electronic system Reliability Distribution device that the present invention also provides a kind of balance supply and demand both sides that know clearly to require, comprising:

Index determination module, for the requirement of clear and definite electronic system reliability index;

Scoring processing module, for each unit for system, receives supply and demand both sides and carries out according to predetermined evaluation factor the appraisal result that Reliability Distribution is marked respectively;

The first reliability processing module, processes for the appraisal result based on supply and demand both sides respectively, obtains the Reliability Distribution result separately for the supply and demand both sides of this unit;

The second reliability processing module, for being weighted processing based on supply and demand both sides Reliability Distribution result separately, obtains the final Reliability Distribution result for this unit.

Further, described the first reliability processing module specifically for, receive the scoring of the supply and demand both sides evaluation factor to each unit, be handled as follows for supply and demand both sides respectively:

Calculate the each evaluation factor average of each unit; According to the evaluation score of this each evaluation factor of unit, calculate the comprehensive grading of this unit; According to the comprehensive grading of this unit, calculate the comprehensive grading of whole system; According to the comprehensive grading of the comprehensive grading of this unit and whole system, calculate the comprehensive grading factor of this unit; According to the comprehensive grading factor of this unit and electronic system reliability index, calculate the Reliability Distribution result for this unit.

Beneficial effect of the present invention is as follows:

The present invention allows supply and demand both sides to propose the Reliability Distribution scheme to system composition unit from angle separately, and both sides' allocation result is weighed and considered definite final allocation result the most at last, has improved the usefulness that electronic system produces.

Other features and advantages of the present invention will be set forth in the following description, and, part from instructions, become apparent, or by implement the present invention understand.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in write instructions, claims and accompanying drawing.

Brief description of the drawings

Fig. 1 is the schematic flow sheet of method described in the embodiment of the present invention;

Fig. 2 is the system construction drawing in embodiment of the present invention instantiation;

Fig. 3 is the reliability function figure of the digital receiver A based on supplier, party in request and final Reliability Distribution result in embodiment of the present invention instantiation;

Fig. 4 is the structural scheme of mechanism installing described in the embodiment of the present invention.

Embodiment

The present invention proposes a kind of electronic system reliability allocation methods and device that supply and demand both sides require of coordinating, its principal feature is: consider the different requirements of supply and demand both sides to different operating time unit reliability, first propose Reliability Distribution scheme by supply and demand both sides from angle separately, and guaranteeing that under the prerequisite that system reliability meets the demands, final Reliability Distribution result is determined in weighting.

Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing forms the application's part, and together with embodiments of the present invention for explaining principle of the present invention.

First 1 to accompanying drawing 3, method described in the embodiment of the present invention is elaborated by reference to the accompanying drawings.

As shown in Figure 1, Fig. 1 is the schematic flow sheet of method described in the embodiment of the present invention, specifically can comprise:

Step 101: clear and definite electronic system reliability index requirement;

It is the input of Reliability Distribution work that electronic system reliability index requires, and Reliability Distribution is that unit composition and the feature thereof of coupling system forms unit by this general requirement classifying rationally of electronic system reliability index to each.

Electronic system reliability index requires often to determine with following form at present:

R _S(T)＝r(1)

In formula (1), R _s() is electronic system Reliable Mathematics model (or reliability function), and T is the system task time, and r is Reliability Index.

Step 102: supply and demand both sides determine evaluation factor;

Evaluation factor should comprise the principal element that affects system composition unit.According to current applicable cases, the main evaluation factor adopting has: importance, complicacy, maturity, working environment, task time.Wherein importance refers to that unit completes the significance level in its set task process in system, is key component if unit inefficacy will cause mission failure, casualties, is important parts if unit inefficacy will cause systemic-function, the serious degradation of performance.Complicacy mainly refers to the quantity of unit composition components and parts, and its complexity is higher more at most for unit composition component number conventionally.Maturity refers to the maturity of unit development, if this unit (or close unit) is through repeatedly developing, its maturity is high with application, if unit is for newly grinding product, its maturity is low.Working environment refers to the unit environment quality of executing the task, and can use for reference the environment classification of GJB299C-2006 " reliability of electronic equipment expectation handbook ".Refer to the start working time of unit task time.

Step 103: receive supplier carries out scoring appraisal result based on its point system;

Wherein, for supplier, its point system is as shown in table 1.

Table 1 supplier point system

Sequence number	Evaluation factor	Score value scope	Point system
				1	Importance	1～10	Key component 1～4, important parts 4～7, general part 7～10
2	Complicacy	1～10	More complicated, score value is approximately high
				3	Maturity	1～10	Adult form 1～4, modified 4～7, brand-new type 7～10
4	Working environment	1～10	More severe, score value is higher
				5	Task time	1～10	Time is longer, and score value is approximately high

Step 104: for every machine of system, carry out Reliability Distribution according to supplier's appraisal result and electronic system reliability index requirement at present, obtain the Reliability Distribution result for the supplier of this unit;

The system of setting up departments is made up of n platform unit, has above-mentioned 5 evaluation factors, by L position supplier expert, the evaluation factor of each unit is marked.If supplier aspect, j expert is S to the prominence score of unit i _sij1, complicacy scoring is S _sij2, maturity scoring is S _sij3, working environment scoring S _sij4, scoring task time is S _sij5, the average score of k evaluation factor of unit i is:

$S_{\mathrm{sik}}=\frac{1}{L}\underset{j=1}{\overset{L}{\mathrm{\Σ}}}{S}_{\mathrm{sijk}}---\left(2\right)$

The comprehensive grading of i platform unit is:

$S_{\mathrm{si}}=\underset{k=1}{\overset{5}{\mathrm{\Π}}}{S}_{\mathrm{sik}}---\left(3\right)$

The comprehensive grading of whole system is:

$S_s=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_{\mathrm{si}}---\left(4\right)$

According to formula (3) and formula (4), the comprehensive grading factor of i platform unit is:

$C_{\mathrm{si}}=\frac{S_{\mathrm{si}}}{S_s}---\left(5\right)$

According to the comprehensive grading factor of i platform unit, it distributes fiduciary level to be thereby have:

$\begin{array}{c}{R}_i\left(t_i\right)=e^{-{\mathrm{\λ}}_i^{\text{'}}{t}_i}=r^{C_{\mathrm{ci}}}={\left(e^{{-\mathrm{\λ}}_{S}T}\right)}^{C_{\mathrm{ci}}}=e^{-C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T}\\ \⇒{\mathrm{\λ}}_i^{\text{'}}{t}_i=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T\⇒{\mathrm{\λ}}_i^{\text{'}}=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T/t_i\end{array}---\left(6\right)$

In formula (6), R _i() is the reliability function of unit i, λ _i, t _ibe respectively distribution crash rate and the task time of unit i, λ _sfor system failure rate.Thus, just obtain the Reliability Distribution result of supplier to unit i.

Step 105: receive party in request carries out scoring appraisal result based on its point system;

For party in request, its point system is as shown in table 2.

Table 2 party in request point system

Sequence number	Evaluation factor	Score value scope	Point system
				1	Importance	1～10	Key component 1～4, important parts 4～7, general part 7～10
2	Complicacy	1～10	More complicated, score value is approximately high
				3	Maturity	1～10	Adult form 1～4, modified 4～7, brand-new type 7～10
4	Working environment	1～10	More severe, score value is higher
				5	Task time	1～10	Time is longer, and score value is approximately low

Step 106: for every machine of system, Reliability Distribution is carried out in the appraisal result of side and electronic system reliability index requirement at present according to demand, obtains the Reliability Distribution result for the party in request of this unit;

The system of setting up departments is made up of n platform unit, has above-mentioned 5 evaluation factors, and by Q position, the expert of party in request marks to the evaluation factor of each unit.If party in request aspect, j expert is S to the prominence score of unit i _cij1, complicacy scoring is S _cij2, maturity scoring is S _cij3, working environment scoring S _cij4, scoring task time is S _cij5, the average score of k evaluation factor of unit i is:

$S_{\mathrm{cik}}=\frac{1}{Q}\underset{j=1}{\overset{Q}{\mathrm{\Σ}}}{S}_{\mathrm{cijk}}---\left(7\right)$

The comprehensive grading of i platform unit is:

$S_{\mathrm{ci}}=\underset{k=1}{\overset{5}{\mathrm{\Π}}}{S}_{\mathrm{cik}}---\left(8\right)$

The comprehensive grading of whole system is:

$S_c=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_{\mathrm{ci}}---\left(9\right)$

According to formula (8) and formula (9), the comprehensive grading factor of i platform unit is:

$C_{\mathrm{ci}}=\frac{S_{\mathrm{ci}}}{S_c}---\left(10\right)$

According to the comprehensive grading factor of i platform unit, it distributes fiduciary level to be thereby have:

$\begin{array}{c}{R}_i\left(t_i\right)=e^{-{\mathrm{\λ}}_i^{\text{'}}{t}_i}=r^{C_{\mathrm{ci}}}={\left(e^{{-\mathrm{\λ}}_{S}T}\right)}^{C_{\mathrm{ci}}}=e^{-C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T}\\ \⇒{\mathrm{\λ}}_i^{\text{'}}{t}_i=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T\⇒{\mathrm{\λ}}_i^{\text{'}}=C_{\mathrm{ci}}{\mathrm{\λ}}_{S}T/t_i\end{array}---\left(11\right)$

In formula (11), R _i() is the reliability function of unit i, λ _i', t _ibe respectively distribution crash rate and the task time of unit i, λ _sfor system failure rate.Thus, just obtain the Reliability Distribution result of party in request to unit i.

Step 107: be weighted processing based on supply and demand both sides Reliability Distribution result separately, obtain the final Reliability Distribution result for unit i;

In the time determining final Reliability Distribution result, introduce weight factor W (0≤W≤1):

$\begin{array}{c}{R}_i\left(t_i\right)=r^{C_{\mathrm{si}}\·W}\·r^{C_{\mathrm{ci}}\·(1-W)}\\ \⇒{\mathrm{\λ}}_{\mathrm{if}}=C_{\mathrm{si}}W{\mathrm{\λ}}_{S}T/t_i+C_{\mathrm{ci}}(1-W){\mathrm{\λ}}_{S}T/t_i=[C_{\mathrm{si}}W+C_{\mathrm{ci}}(1-W)]{\mathrm{\λ}}_{S}T/t_i\end{array}---\left(12\right)$

In formula (12), λ _iffor the final distribution fiduciary level of unit i.For determining of weight factor, need jointly determine, the in the situation that of the equalization of supply and demand both sides status, generally have W=1/2 by supply and demand both sides.For supplier market, generally there is W>1/2; For party in request market, generally there is W<1/2.

Below the reliability of electronic system is verified.

According to formula (12), system dependability is:

$\begin{array}{c}{R}_S\left(T\right)=\underset{i=1}{\overset{n}{\mathrm{\&Pi;}}}{e}^{-{\mathrm{\&lambda;}}_{\mathrm{if}}{t}_i}=\underset{i=1}{\overset{n}{\mathrm{\&Pi;}}}{e}^{-(C_{\mathrm{si}}W{\mathrm{\&lambda;}}_{S}T+C_{\mathrm{ci}}(1-W){\mathrm{\&lambda;}}_{S}T)}=\underset{i=1}{\overset{n}{\mathrm{\&Pi;}}}{e}^{-C_{\mathrm{si}}W{\mathrm{\&lambda;}}_{S}T}\&CenterDot;\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{e}^{-C_{\mathrm{ci}}(1-W){\mathrm{\&lambda;}}_{S}T}\\ ={\left(\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{e}^{-C_{\mathrm{si}}{\mathrm{\&lambda;}}_{S}T}\right)}^W\&CenterDot;{\left(\underset{i=1}{\overset{n}{\mathrm{\&Pi;}}}{e}^{-C_{\mathrm{ci}}{\mathrm{\&lambda;}}_{S}T}\right)}^{(1-W)}={\left(e^{-{\mathrm{\&lambda;}}_{S}T\&CenterDot;\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{C}_{\mathrm{si}}}\right)}^W\&CenterDot;{\left(e^{-{\mathrm{\&lambda;}}_{S}T\&CenterDot;\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{C}_{\mathrm{ci}}}\right)}^{(1-W)}\\ ={\left(e^{-{\mathrm{\&lambda;}}_{S}T}\right)}^W\&CenterDot;{\left(e^{-{\mathrm{\&lambda;}}_{S}T}\right)}^{(1-W)}=e^{-{\mathrm{\&lambda;}}_{S}T}=r\end{array}---\left(13\right)$

Wherein, the reliability function that Rs (T) is electronic system.

As can be seen here, through type (13), formula (12) can determine, the Reliability Distribution scheme described in the embodiment of the present invention can guarantee to meet electronic system reliability index.

For the ease of understanding method described in the embodiment of the present invention, illustrate below in conjunction with certain communication payload system the scheme that the embodiment of the present invention proposes.

The hardware of this communication payload system forms as shown in Figure 2, comprises radio-frequency front-end, A type digital receiver (being called for short afterwards digital receiver A), Type B digital receiver (being called for short afterwards digital receiver B), controller, intermediate frequency change-over switch, and mark source frequently.Wherein, be 3 years (26280 hours) task time of radio-frequency front-end, digital receiver A, controller, be 2 years (17520 hours) task time of digital receiver B, and be 1 year (8780 hours) task time of intermediate frequency change-over switch.

According to the application flow in Fig. 1, first, by the clear and definite Reliability Index requirement of party in request, be made as:

R _S(26280h)＝0.80(14)

Three the year end Reliability Index 0.80.

According to the step 2 in Fig. 1, by supply and demand, both sides determine evaluation factor.In present case, evaluation factor comprises: importance, complicacy, maturity, working environment, task time.

According to the step 103 in Fig. 1, supplier carries out scoring based on its point system.If supplier carries out reliability factor scoring by 7 experts, wherein the appraisal result of digital receiver A is as shown in table 3.

The appraisal result of table 3 supplier expert to digital receiver A

With table 3 similarly, obtain the comprehensive grading of supplier to each unit, as shown in table 4.

The comprehensive grading of table 4 supplier to each unit

Unit title	Comprehensive grading S si
		Radio-frequency front-end	2329.25
Digital receiver A	4144.91
		Digital receiver B	3121.26
Controller	3578.68
		Intermediate frequency change-over switch	1225.35
Mark is source frequently	2256.75

According to the step 104 in Fig. 1, carry out the Reliability Distribution based on reliability factor appraisal result.Based on the result in table 4, supplier is 16666.2 to the comprehensive grading of whole system, and supplier is as shown in table 5 to the comprehensive grading factor of each unit.

The comprehensive grading factor of table 5 supplier to each unit

Unit title	Comprehensive grading Ssi
		Radio-frequency front-end	0.1404
Digital receiver A	0.2487
		Digital receiver B	0.1873
Controller	0.2147
		Intermediate frequency change-over switch	0.0735
Mark is source frequently	0.1354

According to formula (6), distribution fiduciary level and the distribution crash rate of supplier to the each unit of system is as shown in table 6.

The comprehensive grading factor of table 6 supplier to each unit

That party in request carries out scoring based on its point system according to the step 105 in Fig. 1.If party in request carries out reliability factor scoring by 6 experts, wherein the appraisal result of digital receiver A is as shown in table 7.

The appraisal result of the expert of table 7 party in request to digital receiver A

With table 7 similarly, obtain the comprehensive grading of supplier to each unit, as shown in table 8.

The comprehensive grading of table 8 party in request to each unit

Unit title	Comprehensive grading S ci
		Radio-frequency front-end	780.25
Digital receiver A	1560.15
		Digital receiver B	2516.25
Controller	1680.75
		Intermediate frequency change-over switch	2225.25
Mark is source frequently	525.80

According to the step 106 in Fig. 1, carry out the Reliability Distribution based on reliability factor appraisal result.Based on the result in table 8, supplier is 9288.45 to the comprehensive grading of whole system, and the comprehensive grading factor of each unit of supplier aspect is as shown in table 9.

The comprehensive grading factor of table 9 party in request to each unit

Unit title	Comprehensive grading S ci
		Radio-frequency front-end	0.0840
Digital receiver A	0.1680
		Digital receiver B	0.2709
Controller	0.1810
		Intermediate frequency change-over switch	0.2396
Mark is source frequently	0.0565

According to formula (11), distribution fiduciary level and the distribution crash rate of party in request to the each unit of system is as shown in table 10.

The comprehensive grading factor of table 10 party in request to each unit

According to the step 5 in Fig. 1, i.e. final Reliability Distribution result is determined in weighting.In this example, establish weights W=1/2.According to formula (12), the system that can obtain respectively forms the final Reliability Distribution result of unit, as shown in table 11.

Table 11 system respectively forms the final Reliability Distribution result of unit

Sequence number	The final crash rate λ that distributes if(10 -6/h)
		Radio-frequency front-end	0.9524
Digital receiver A	1.7696
		Digital receiver B	2.9155
Controller	1.6807
		Intermediate frequency change-over switch	3.9899
Mark is source frequently	0.8149

Fig. 3 has provided the digital receiver A reliability function based on supplier, party in request's Reliability Distribution result, gives the reliability function based on final allocation result.

Connect down by reference to the accompanying drawings and 4 device described in the embodiment of the present invention is elaborated.

As shown in Figure 4, Fig. 4 is the structural representation installing described in the embodiment of the present invention, specifically can comprise:

Index determination module, for the requirement of clear and definite electronic system reliability index;

Above-mentioned electronic system reliability index requires to adopt following form to determine:

R _S(T)＝r

Wherein, R _s() is reliability models or reliability function, and T is the system task time, and r is electronic system reliability index.

Scoring processing module, for each unit for system, receives supply and demand both sides and carries out according to predetermined evaluation factor the appraisal result that Reliability Distribution is marked respectively;

The first reliability processing module, processes for the appraisal result based on supply and demand both sides respectively, obtains the Reliability Distribution result separately for the supply and demand both sides of this unit;

The second reliability processing module, for being weighted processing based on supply and demand both sides Reliability Distribution result separately, obtains the final Reliability Distribution result for this unit.

Wherein, the first reliability processing module specifically for, receive the scoring of the supply and demand both sides evaluation factor to each unit, be handled as follows for supply and demand both sides respectively:

Calculate the each evaluation factor average of each unit; According to the evaluation score of this each evaluation factor of unit, calculate the comprehensive grading of this unit; According to the comprehensive grading of this unit, calculate the comprehensive grading of whole system; According to the comprehensive grading of the comprehensive grading of this unit and whole system, calculate the comprehensive grading factor of this unit; According to the comprehensive grading factor of this unit and electronic system reliability index, calculate the Reliability Distribution result for this unit.

For the concrete computation process of above-mentioned modules, owing to illustrating in previous methods, therefore repeat no more herein.

In sum, electronic system reliability allocation methods and device that the embodiment of the present invention provides a kind of balance supply and demand both sides to require, described in inventive embodiments, method and device are being guaranteed to meet under the prerequisite of entire system reliability index, the difference that combines supply and demand both sides is considered, the relation of having weighed unit development realizability and unit usefulness, benefit, has improved the usefulness that electronic system produces.

The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (10)

1. the electronic system reliability allocation methods that balance supply and demand both sides require, is characterized in that, comprising:

Specify the requirement of electronic system reliability index;

For each unit of system, receive supply and demand both sides carry out respectively Reliability Distribution scoring appraisal result according to predetermined evaluation factor, and based on electronic system reliability index require and supply and demand both sides separately appraisal result carry out respectively Reliability Distribution, obtain the Reliability Distribution result separately for the supply and demand both sides of this unit;

Be weighted processing based on supply and demand both sides Reliability Distribution result separately, obtain the final Reliability Distribution result for this unit.

2. method according to claim 1, is characterized in that, above-mentioned electronic system reliability index requires to adopt following form to determine:

R _S(T)＝r

Wherein, R _s() is reliability models or reliability function, and T is the system task time, and r is electronic system reliability index.

3. method according to claim 1, is characterized in that, supply and demand both sides carry out respectively Reliability Distribution based on scoring, obtains specifically comprising for the process of the supply and demand both sides of this unit Reliability Distribution result separately:

Receive the scoring of the evaluation factor of supply and demand both sides to each unit, be handled as follows for supply and demand both sides respectively:

Calculate the each evaluation factor average of each unit;

According to the evaluation score of this each evaluation factor of unit, calculate the comprehensive grading of this unit;

According to the comprehensive grading of this unit, calculate the comprehensive grading of whole system;

According to the comprehensive grading of the comprehensive grading of this unit and whole system, calculate the comprehensive grading factor of this unit;

According to the comprehensive grading factor of this unit and electronic system reliability index, calculate the Reliability Distribution result for this unit.

4. according to the method described in any one in claim 1 to 3, it is characterized in that, supply and demand both sides comprise multiple in following factor for the evaluation factor of each unit:

Prominence score, complicacy scoring, maturity scoring, working environment scoring, scoring task time.

5. method according to claim 4, is characterized in that, the system of setting up departments is made up of n platform unit, has above-mentioned 5 evaluation factors, by L position supplier expert, the evaluation factor of each unit is marked; If supplier aspect, j expert is S to the prominence score of unit i _sij1, complicacy scoring is S _sij2, maturity scoring is S _sij3, working environment scoring S _sij4, scoring task time is S _sij5, the average score of k evaluation factor of unit i is:

$S_{\mathrm{sik}}=\frac{1}{L}\underset{j=1}{\overset{L}{\mathrm{\&Sigma;}}}{S}_{\mathrm{sijk}}$

The comprehensive grading of i platform unit is:

$S_{\mathrm{si}}=\underset{k=1}{\overset{5}{\mathrm{\&Pi;}}}{S}_{\mathrm{sik}}$

The comprehensive grading of whole system is:

$S_s=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{S}_{\mathrm{si}}$

The comprehensive grading factor of i platform unit is:

$C_{\mathrm{si}}=\frac{S_{\mathrm{si}}}{S_s}$

According to the comprehensive grading factor of i platform unit, it distributes fiduciary level to be thereby have:

$\begin{array}{c}{R}_i\left(t_i\right)=e^{-{\mathrm{\&lambda;}}_i{t}_i}=r^{C_{\mathrm{si}}}={\left(e^{{-\mathrm{\&lambda;}}_{S}T}\right)}^{C_{\mathrm{si}}}=e^{-C_{\mathrm{si}}{\mathrm{\&lambda;}}_{S}T}\\ \&DoubleRightArrow;{\mathrm{\&lambda;}}_i{t}_i=C_{\mathrm{si}}{\mathrm{\&lambda;}}_{S}T\&DoubleRightArrow;{\mathrm{\&lambda;}}_i=C_{\mathrm{si}}{\mathrm{\&lambda;}}_{S}T/t_i\end{array}$

Wherein, R _i() is the reliability function of unit i, λ _i, t _ibe respectively distribution crash rate and the task time of unit i, λ _sfor system failure rate.

6. method according to claim 4, is characterized in that,

The system of setting up departments is made up of n platform unit, has above-mentioned 5 evaluation factors, and by Q position, the expert of party in request marks to the evaluation factor of each unit; If party in request aspect, j expert is S to the prominence score of unit i _cij1, complicacy scoring is S _cij2, maturity scoring is S _cij3, working environment scoring S _cij4, scoring task time is S _cij5, the average score of k evaluation factor of unit i is:

$S_{\mathrm{cik}}=\frac{1}{Q}\underset{j=1}{\overset{Q}{\mathrm{\&Sigma;}}}{S}_{\mathrm{cijk}}$

The comprehensive grading of i platform unit is:

$S_{\mathrm{ci}}=\underset{k=1}{\overset{5}{\mathrm{\&Pi;}}}{S}_{\mathrm{cik}}$

The comprehensive grading of whole system is:

$S_c=\underset{j=1}{\overset{n}{\mathrm{\&Sigma;}}}{S}_{\mathrm{ci}}$

The comprehensive grading factor of i platform unit is:

$C_{\mathrm{ci}}=\frac{S_{\mathrm{ci}}}{S_c}$

According to the comprehensive grading factor of i platform unit, it distributes fiduciary level to be thereby have:

$\begin{array}{c}{R}_i\left(t_i\right)=e^{-{\mathrm{\&lambda;}}_i^{\text{'}}{t}_i}=r^{C_{\mathrm{ci}}}={\left(e^{{-\mathrm{\&lambda;}}_{S}T}\right)}^{C_{\mathrm{ci}}}=e^{-C_{\mathrm{ci}}{\mathrm{\&lambda;}}_{S}T}\\ \&DoubleRightArrow;{\mathrm{\&lambda;}}_i^{\text{'}}{t}_i=C_{\mathrm{ci}}{\mathrm{\&lambda;}}_{S}T\&DoubleRightArrow;{\mathrm{\&lambda;}}_i^{\text{'}}=C_{\mathrm{ci}}{\mathrm{\&lambda;}}_{S}T/t_i\end{array}$

Wherein, R _i() is the reliability function of unit i, λ _i', t _ibe respectively distribution crash rate and the task time of unit i, λ _sfor system failure rate.

7. according to the method described in claim 5 or 6, it is characterized in that, based on supply and demand both sides Reliability Distribution result λ separately _iand λ _i' and predetermined weight factor W be weighted processing, and jointly confirm by both party, obtain for the final Reliability Distribution result of this unit; The span of described weight factor W is 0≤W≤1.

8. method according to claim 7, is characterized in that, is weighted processing based on supply and demand both sides Reliability Distribution result separately, and acquisition specifically comprises for the process of the final Reliability Distribution result of this unit:

$\begin{array}{c}{R}_i\left(t_i\right)=r^{C_{\mathrm{si}}\&CenterDot;W}\&CenterDot;r^{C_{\mathrm{ci}}\&CenterDot;(1-W)}\\ \&DoubleRightArrow;e^{-{\mathrm{\&lambda;}}_{\mathrm{if}}{t}_i}={\left(e^{-{\mathrm{\&lambda;}}_{S}T}\right)}^{C_{\mathrm{si}}\&CenterDot;W}\&CenterDot;{\left(e^{-{\mathrm{\&lambda;}}_{S}T}\right)}^{C_{\mathrm{Ci}}\&CenterDot;(1-W)}=e^{-[C_{\mathrm{si}}W{\mathrm{\&lambda;}}_{S}T+C_{\mathrm{ci}}(1-W){\mathrm{\&lambda;}}_{S}T]}\\ \&DoubleRightArrow;{\mathrm{\&lambda;}}_{\mathrm{if}}=C_{\mathrm{si}}W{\mathrm{\&lambda;}}_{S}T/t_i+C_{\mathrm{ci}}(1-W){\mathrm{\&lambda;}}_{S}T/t_i=[C_{\mathrm{si}}W+C_{\mathrm{ci}}(1-W)]{\mathrm{\&lambda;}}_{S}T/t_i\\ =W\&CenterDot;{\mathrm{\&lambda;}}_i+(1-W){\mathrm{\&lambda;}}_i^{\text{'}}\end{array}$

Wherein, R _i(t _i) the final distribution fiduciary level of expression unit i, represent that supply and demand side distributes fiduciary level, represent that party in request distributes fiduciary level, T represents system task time, λ _iffor the final Reliability Distribution result of unit i.

9. the electronic system Reliability Distribution device that balance supply and demand both sides require, is characterized in that, comprising:

Index determination module, for the requirement of clear and definite electronic system reliability index;

Scoring processing module, for each unit for system, receives supply and demand both sides and carries out according to predetermined evaluation factor the appraisal result that Reliability Distribution is marked respectively;

The first reliability processing module, processes for the appraisal result based on supply and demand both sides respectively, obtains the Reliability Distribution result separately for the supply and demand both sides of this unit;

The second reliability processing module, for being weighted processing based on supply and demand both sides Reliability Distribution result separately, obtains the final Reliability Distribution result for this unit.

10. device according to claim 9, is characterized in that, described the first reliability processing module specifically for, receive the scoring of the supply and demand both sides evaluation factor to each unit, be handled as follows for supply and demand both sides respectively:

Calculate the each evaluation factor average of each unit; According to the evaluation score of this each evaluation factor of unit, calculate the comprehensive grading of this unit; According to the comprehensive grading of this unit, calculate the comprehensive grading of whole system; According to the comprehensive grading of the comprehensive grading of this unit and whole system, calculate the comprehensive grading factor of this unit; According to the comprehensive grading factor of this unit and electronic system reliability index, calculate the Reliability Distribution result for this unit.