BlockSim Example: Phase with Failure or Success Paths: Difference between revisions

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== Phase with F/S links ==
#REDIRECT [[Example_Using_Success_Failure_Paths_in_Phase_Diagrams]]
 
==== Purposes ====
 
The purposes of this example is to illustrate how to apply F/S links in Phase simulation.
 
==== RBDs for Phase and settings ====
The RBDs for Phase 1 and Phase 2 are as followings:
[[Image:RBD_for_Phase_1_and_2.png|thumb|center|500px]]
 
In Phase 1, Block A follows Weibull distribution with Beta = 1.5 and Eta = 1000 hours. Block B follows Weibull distribution with Beta = 1.5 and Eta = 1200 hours. No maintenance.
 
In Phase 2, Block A follows Weibull distribution with Beta = 1.5 and Eta = 900 hours. Block B follows Weibull distribution with Beta = 1.5 and Eta = 1150 hours. No maintenance.
 
==== Example 1  ====
 
The Phase diagram is as followings: [[Image:Phase Example 1.png|thumb|center|500px]]
 
Maintenance phase has a CM with duration 80 hours and PM with duration 20 hours for both Block A and B.
 
Phase 1 has duration 500 hours and Phase 2 has duration 100 hours.
 
If there is no failure in Phase 1, upon finish, it goes to Phase 2. If there is a failure in Phase 1, it would go to Maintenance Phase 3 directly. If there is not failure in Phase 2, upon finish, it goes back to Phase 1. If there is a failure in Phase 2, it would to go Maintenance Phase 3.
 
The Block Up/Down plot is as followings:
 
#At the first cycle (0-500 for Phase 1 and 500-600 for Phase 2), there is no failure, thus after Phase 2, Phase 1 is executed (back to Phase 1 after this cycle).
#At 1135 (Phase 2 at second cycle), Block A fails. System doesn't enter Maintenance Phase 3 immediatly because in Phase 2, Block A and Block B are parallel. Only failure of Block A doesn't bring system down. 
#At 1200, system finishes Phase 2 and goes back to Phase 1. There is not system failure in Phase 2 (only failure is Block A). In Phase 1, Block A and Block B are in series. Failure of Block A passed from Phase 2 will bring system down in Phase 1. Thus there is a system failure in Phase 1 and system goes to Maintenance Phase 3 immediatly. Block B is not down, thus it gets PM with duration 20 hours. Block A gets CM with duration 100 hours. 
#At 2738, Block A fails in Phase 1 and bring system down immediatly. System goes into Maintenance Phase 3 immediatly. Block A gets CM and Block B gets PM.
 
[[Image:Phase Up Down plot for Example 1.png|thumb|center|500px]]
 
==== Example 2  ====
 
The Phase diagram is as followings: [[Image:Phase Example 2.png|thumb|center|500px]]  
 
Everything is the same as that in Example 1 except that the link from Phase 2 to Maintenance Phase 3 changes from F link to S link. This means that even there is no failure in Phase 2, the system still go to Maintenance Phase 3 after Phase 2.
 
The Block Up/Down plot is as followings:
 
#At the first cycle (0-500 for Phase 1 and 500-600 for Phase 2), there is no failure, thus after Phase 2, the system go to Maintennace Phase 3 for PM for both Block A and B with duration 20 hours.

Latest revision as of 09:42, 31 July 2012

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