Session: 14D, Thursday, 28 January 2010, 1015-1215
Moderator: Claudio Spano, CRP, ReliaSoft Brasil
The session deals with condition-based maintenance, sensitivity analysis for Maintenance of a gradually deteriorating systems or devices which undergoes a change in its deterioration rate due to an environment or operational condition.
Papers:
14D1 [0043] A CONCEPTUAL MODELÂ FOR ‘INHERENT RELIABILITY’Â FOR NUCLEAR WEAPONS
by Rene L. Bierbaum, Sandia National Laboratories
Many people, when thinking about a product’s lifetime vis-à -vis defectiveness, use the “bathtub curve” as a model. However, this model is not entirely apt for nuclear weapons. In this paper, a conceptual model for inherent reliability for nuclear weapons will be proposed. Historical surveillance observations that appear to substantiate the bathtub curve model of reliability will instead be shown to support the new conceptual model. This model is likely relevant to other one-shot products.
14D2 [0090] OPTIMAL SAFETY-CRITICAL PARTS REPLACEMENT IN AGING FLEETS
by Peng Wang, Ph.D., Hamilton Sundstrand Power Systems and Tongdan Jin, Ph.D., Texas A&M International University
This paper attempts to propose a practical approach to solving a maintenance optimization problem with uncertain utilizations. This problem is associated with the determination of optimal replacement times for safety-critical parts used in aircraft systems by considering both safety requirements and cost benefits. Specifically, a fleet of aircrafts installed with a type of turbine engine have been in operation for several years.
14D3 [0081] VALUE OF CONDITION MONITORING INFORMATION FOR MAINTENANCE DECISION-MAKING by Tuan Khac Huynh, Anne Barros, Christophe Berenguer, Ph.D., Universite de technologie de Troyes/CNRS-LM2 ,Inmaculada Torres-Castro, Escuela Politecnica
This paper develops the mathematical cost models for two maintenance policies (i.e. block replacement and periodic inspection/replacement) for a one-unit deteriorating system whose failures are due to the competing causes of accumulated wear and traumatic “shock” events. The value of the condition monitoring information obtained through the inspections is investigated by comparing on numerical examples the costs of both policies.
14D4 [0082] ASSESSMENT OF MAINTENANCE POLICIES FOR A MULTI-DETERIORATION RATES SYSTEM by Amelie Ponchet, Mitra Fouladirad, and Dr. A. Grall, Universite Technologie Troyes
This paper deals with condition-based maintenance of a gradually deteriorating system or device which undergoes a change in its deterioration rate due to e.g. an environment condition. The change is modeled by covariates which impact the degradation rate and lead to its sudden increase in a life cycle. The main aim of the work is to develop models which allow to assess the interest of change mode monitoring from the maintenance decision-making point of view.
Condition Monitoring and Maintainability Modeling Applications
Session: 14D, Thursday, 28 January 2010, 1015-1215
Moderator: Claudio Spano, CRP, ReliaSoft Brasil
The session deals with condition-based maintenance, sensitivity analysis for Maintenance of a gradually deteriorating systems or devices which undergoes a change in its deterioration rate due to an environment or operational condition.
Papers:
14D1 [0043] A CONCEPTUAL MODELÂ FOR ‘INHERENT RELIABILITY’Â FOR NUCLEAR WEAPONS
by Rene L. Bierbaum, Sandia National Laboratories
Many people, when thinking about a product’s lifetime vis-à -vis defectiveness, use the “bathtub curve” as a model. However, this model is not entirely apt for nuclear weapons. In this paper, a conceptual model for inherent reliability for nuclear weapons will be proposed. Historical surveillance observations that appear to substantiate the bathtub curve model of reliability will instead be shown to support the new conceptual model. This model is likely relevant to other one-shot products.
14D2 [0090] OPTIMAL SAFETY-CRITICAL PARTS REPLACEMENT IN AGING FLEETS
by Peng Wang, Ph.D., Hamilton Sundstrand Power Systems and Tongdan Jin, Ph.D., Texas A&M International University
This paper attempts to propose a practical approach to solving a maintenance optimization problem with uncertain utilizations. This problem is associated with the determination of optimal replacement times for safety-critical parts used in aircraft systems by considering both safety requirements and cost benefits. Specifically, a fleet of aircrafts installed with a type of turbine engine have been in operation for several years.
14D3 [0081] VALUE OF CONDITION MONITORING INFORMATION FOR MAINTENANCE DECISION-MAKING by Tuan Khac Huynh, Anne Barros, Christophe Berenguer, Ph.D., Universite de technologie de Troyes/CNRS-LM2 ,Inmaculada Torres-Castro, Escuela Politecnica
This paper develops the mathematical cost models for two maintenance policies (i.e. block replacement and periodic inspection/replacement) for a one-unit deteriorating system whose failures are due to the competing causes of accumulated wear and traumatic “shock” events. The value of the condition monitoring information obtained through the inspections is investigated by comparing on numerical examples the costs of both policies.
14D4 [0082] ASSESSMENT OF MAINTENANCE POLICIES FOR A MULTI-DETERIORATION RATES SYSTEM by Amelie Ponchet, Mitra Fouladirad, and Dr. A. Grall, Universite Technologie Troyes
This paper deals with condition-based maintenance of a gradually deteriorating system or device which undergoes a change in its deterioration rate due to e.g. an environment condition. The change is modeled by covariates which impact the degradation rate and lead to its sudden increase in a life cycle. The main aim of the work is to develop models which allow to assess the interest of change mode monitoring from the maintenance decision-making point of view.