Browsing NTNU Open by Author "Zhang, Aibo"
Now showing items 1-10 of 10
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A Degrading Element of Safety-instrumented Systems with Combined Maintenance Strategy
Zhang, Aibo; Liu, Yiliu; Barros, Anne; Kassa, Elias (Chapter, 2019)Safety-instrumented systems (SISs) are widely used to prevent hazardous events. The mechanical actuator subsystem in a SIS can become more vulnerable with time due to progressive degradation mechanisms, such as erosion, ... -
Functional Safety of Railway Signaling Systems: Performance Requirements and Evaluation Methods
Zhang, Aibo; Jiang, Lei; Xie, Min; Kassa, Elias; Liu, Yiliu (Chapter, 2021)Signaling is fundamental to the safe operation of the railway, ensuring that trains are spaced safely apart and conflicting movements are avoided. Railway signals are `traffic light' devices, which tell a train driver if ... -
Group maintenance optimization of subsea Xmas trees with stochastic dependency
Fan, Dongming; Zhang, Aibo; Feng, Qiang; Cai, Baoping; Liu, Yiliu; Ren, Yi (Peer reviewed; Journal article, 2021)Subsea Xmas trees (XTs) are vital equipment for offshore oil and gas development. Due to a long and continuous operation, components of XTs often become vulnerable subjected to degradation and unexpected failures. Due to ... -
Inspection and maintenance optimization for heterogeneity units in redundant structure with Non-dominated Sorting Genetic Algorithm III
Zhang, Aibo; Hao, Songhua; Xie, Min; Liu, Yiliu; Yu, Haoshui (Journal article; Peer reviewed, 2022) -
Optimization of maintenances following proof tests for the final element of a safety-instrumented system
Zhang, Aibo; Zhang, Tieling; Barros, Anne; Liu, Yiliu (Journal article; Peer reviewed, 2020)Safety-instrumented systems (SISs) have been widely installed to prevent accidental events and mitigate their consequences. Mechanical final elements of SISs often become vulnerable with time due to degradations, but the ... -
Performance analysis of redundant safety-instrumented systems subject to degradation and external demands
Zhang, Aibo; Barros, Anne; Liu, Yiliu (Journal article; Peer reviewed, 2019)Safety-instrumented systems (SISs) play a vital role in preventing hazardous events in the offshore facilities. Many of existing performance analysis of SISs are based on the constant failure rate assumption, which is ... -
Preventive maintenance optimization for repairable products considering two-dimensional warranty and customer satisfaction
Wang, Yukun; Liu, Yiliu; Zhang, Aibo (Journal article; Peer reviewed, 2018)Customer satisfaction with a purchased product is closely related to the product performance within the warranty region and even the performance during the remainder of its useful life. Every satisfied customer may boost ... -
Prognostic and health management for safety barriers in infrastructures: opportunities and challenges
Zhang, Aibo; Liu, Yiliu; Barros, Anne; Wang, Yukun (Chapter, 2018)Different types of safety barriers are deployed in many infrastructures to reduce the occurrences of hazards, and protect people, environment and other assets in case the unexpected events have occurred and the capacity ... -
Prognostics and health management of safety-instrumented systems: approaches of degradation modeling and decision-making
Zhang, Aibo (Doctoral theses at NTNU;2021:36, Doctoral thesis, 2021)Modern industries are developing towards a high-integrated direction with overwhelming complexities bringing benefits and potential risks with catastrophic consequences simultaneously. To reduce the occurrences of undesired ... -
Study of testing and maintenance strategies for redundant final element in SIS with imperfect detection of degraded state
Zhang, Aibo; Srivastav, Himanshu; Barros, Anne; Liu, Yiliu (Journal article; Peer reviewed, 2021)Safety-instrumented systems (SISs) have been widely installed to lower risks of equipment/ process by performing the designed safety functions in cases of demands. Final elements remain dormant mostly in a low demand mode ...