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2 Journal of Polish Safety and Reliability Association

2 2011

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Integrated software tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 5. Integrated software tools application – Improved exemplary system operation and reliability characteristics prediction

Blokus-Roszkowska A., Kołowrocki K., Salahuddin H. M.

Journal of Polish Safety and Reliability Association

2011

Vol. 2, No. 2

307--322

There is presented the application of the integrated software tools to the reliability of the improved exemplary complex technical system prediction. There are considered three ways of the exemplary system reliability improvement, i.e. a hot single reservation of its components, a cold single reservation of its components and replacing its components by the improved components with reduced intensities of departure from the reliability state subsets. Automatically obtained, using the computer program CP 8.16, the evaluations of these ways improved exemplary system unconditional multistate reliability function, the expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the mean values of its lifetimes in the particular reliability states are presented. Moreover, in the case when the improved system is repairable, its renewal and availability characteristics are estimated using the computer program CP 8.8 with appropriately given data.

Computer aided prediction of improved complex technical systems reliability

Blokus-Roszkowska A., Kołowrocki K.

Journal of Polish Safety and Reliability Association

2011

Vol. 2, No. 2

255--266

In the paper there is presented the computer program for reliability analysis of complex technical systems with reserved and improved components along with computer program description and application. The computer program allows for automatic reliability characteristics prediction of the improved complex technical systems with hot and cold single reservation of their components and of the improved complex technical systems with reduced intensities of departure from the reliability state subsets of their components. Under the assumption that system components have exponential reliability functions, the unconditional reliability function, the mean values and standard deviations of the unconditional lifetimes in the reliability state subsets and in particular reliability states, the system risk function and the moment when the system risk exceeds a permitted level of the complex technical systems before and after their improvement are determined.