ОЦЕНКА ФУНКЦИОНАЛЬНОЙ БЕЗОПАСНОСТИ СИСТЕМ, СВЯЗАННЫХ С БЕЗОПАСНОСТЬЮ

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  • - 4 (18) 2011 45

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    ESTIMATION OF FUNCTIONAL SAFETY THE SYSTEMS CONNECTED WITH

    SAFETY

    V.A.Bogatyryov, S.V.Bibikov

    St.-Petersburg state university of service and economy(SPbSUSE), 191015, St.-Petersburg, street Kavalergardsky, 7

    Open Company "Center of speech technologies"

    196084, St.-Petersburg, street Krasutsky, 4

    Summary The estimation of functional safety of systems of maintenance of the safety, con-

    structed on the basis of the duplicated microprocessor complexes is considered. The offered estimation

    allows to consider periodicity of the control and transition possibility in a dangerousbecause of not detec-

    tion of refusal of one channel of a complex.

    Keywords: the safety; the dangerous refusal; the protected refusal; the duplicated; the periodic

    control.

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    2 2

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    t

    t

    P t et t

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    ( ) (1 ) 2(1 ) (1/ (2 1)),t t t mQ t e e e

    ( ) 1P t - ( )Q t ; 2

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    ( ) (1 ((1 ) 2(1 ) )) ,t t tT P t dt e e e g dt

    g . [2] 1/ (2 1).mg

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    ) 2( ) 1 (1 ) .tP t e -

    - =1,8 10

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    - 4 (18) 2011 47

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    1

    ( ) 1 1 ( ) .i

    i

    T Q t i Q t

    2

    ( ) (1 ) 2(1 ) (1/ (2 1)),mQ t e e e

    , = 15 =0,2245 10

    -6; 6,209 10

    -6; 20,9 10

    -6 1/. -

    T=3,18 10

    15; 6,11 10

    12;

    5,46 1011

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    1. .., .., .. -, . .2003. 263 . 2. //. .., .. . 1978.287 . 3. Bogatyrev V.A. Exchange of Duplicated Compu-ting Complexes in Fault tolerant Systems. // Auto-matic Control and Computer Sciences. 2011. Vol. 46. 5. P. 268276.

    4. .. // . . . 1982. 8. . 93-96.

    5. .. // . . . 1982. 11. . 84-87.

    6. .. - // . 1991. 6. . 86-88.

    7. .. - // . 1999. 12. . 29-32.

    8. .. - // -. 1997. 3. . 21 29.

    , - , .:+7 911-726-02-26, -

    mail:vladimir.bogatyrev@gmail.com; , " " -

    ; .: +7 921 3266039 . E-mail bibikov@speechpro.com.

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