| Title |
Sistemos gedimo modeliavimas ir tikimybinis vertinimas / |
| Translation of Title |
Modelling and Probabilistic Assessment of System Failure. |
| Authors |
Naujokaitis, Darius |
| Full Text |
|
| Pages |
74 |
| Keywords [eng] |
system failure ; fault tree ; probabilistic assessment ; binary decision diagram ; minimal cut set |
| Abstract [eng] |
Modelling of system failure usually is performed applying so-called fault trees. Assessment of system failure probability and failure occurrence causes usually is performed developing a minimal cut-set (MCS) and according to it evaluating probability of system failure. The last twenty years a binary decision diagram (BDD) has been applied for the exact evaluation of system failure. However, a methodology of creation and application of BDD is still under development. Till now in Lithuania for the assessment of system failure probability BDD has not been applied yet. Presenting a performed work the main methods of development of MCS and BDD as well as features of their application is described. Also, the model and assessment of failure of Kaunas hydropower dam gates’ control system is presented. For this task the different methods of development of MCS and BDD as well as corresponding software was applied. Having performed the testing calculations a comparison of results is presented too. In the work the main advantages and disadvantages of MCS and BDD application are described and newly created software “DemoITE” is introduced. The developed algorithms and universal software “DemoITE” is used for visualization of failure causes and for exact estimation of the investigated system failure probability. Also, it is proposed the order of basic events on purpose to design the least BDD. |
| Type |
Master thesis |
| Language |
Lithuanian |
| Publication date |
2010 |
