pdf download - Software and Computer Technology - TU Delft

Lydia Models
C.2 Model of the Power Supply Example
}
! h => ( ( out1 = f a l s e ) and ( o ut2 = f a l s e ) ) ; / / s t u c k −at −
z e r o
/ / D e f i n i t i o n Power D i s t r i b u t i o n U nit
system PDU
(
bool s t a r t u p ,
bool out1 , out2 , o ut3
) {
/ / d e c l a r a t i o n h e a l t h v a r i a b l e
bool h ;
a t t r i b u t e h e a l t h ( h ) = t r u e ;
a t t r i b u t e p r o b a b i l i t y ( h ) = h ? 0 . 9 5 : 0 . 0 5 ;
}
h => ( ( out1 = s t a r t u p ) and ( o ut2 = s t a r t u p ) and ( o ut3
= s t a r t u p ) ) ;
! h => ( ( out1 = f a l s e ) and ( o ut2 = f a l s e ) and ( o ut3 =
f a l s e ) ) ; / / s t u c k −at −z e r o
/ / D e f i n i t i o n of one of a u n i t t h a t need v o l t a g e
/ / ( e . g . , c o l l i m a t o r , c h i l l e r )
system Unit
(
bool i n p u t ,
bool on
) {
/ / d e c l a r a t i o n h e a l t h v a r i a b l e
bool h ;
a t t r i b u t e h e a l t h ( h ) = t r u e ;
a t t r i b u t e p r o b a b i l i t y ( h ) = h ? 0 . 9 9 : 0 . 0 1 ;
}
/ / d e f i n i t i o n b e h a v i o r
h => ( on = i n p u t ) ;
! h => ( on = f a l s e ) ; / / s t u c k −at −z e r o
/ / D e f i n i t i o n power s u p p l y example system
system Power Supply
(
bool s t a r t u p , / / i n p u t
bool s t a t u s F D , status TBCB , status CRCB , / / o u t p u t s
bool status COL , s t a t u s c h i l l e r / / o u t p u t s
) {
/ / d e c l a r a t i o n i n t e r m e d i a t e v a r i a b l e s
bool c a b l e A i n , c a b l e A o u t ;
99