Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Series system"”.
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Evaluation of the accuracy of a lower confidence limit estimate for series system reliability.
… (1- ƴ) % confidence limit for reliability of a system of independent components connected in logical series. The procedure takes a Bayesian approach and uses test data on the individual components where the sample sizes may be unequal and no knowledge of the component failure distribution is …
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Development of Passive Lower Back Exoskeletons
… as an energy storage medium while the second system utilizes a series system comprised of a gas spring and metal coil spring. The first exoskeleton was successfully tested long term in a warehouse environment and in laboratory experiments. From these tests and feedback from wearers several …
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Informing Data-Driven Recyclable Aluminum Design with Phase Constraints
… viable alloys. This thesis focuses on the 6xxx-series system through a broad dataset comprising all known Al-Mg-Si composition and thermodynamic calculations of individual compositions. Explicit matrix phase constraints are not superior to basic Al composition constraints within lean alloys. To …
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Sequential Designs with Application in Software Engineering
… scheme to estimate the reliability of a software system using partition testing. We have shown both theoretically and through simulation that the proposed scheme always performs at least as well as fixed sampling approaches where test case allocation is predetermined, and in all but the most …
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Scheduling optimal maintenance times for a system based on component reliabilities
… maintenance planning to a multi-component series system. An attempt is made to develop a function which represents the expected cost rate (cost per unit time) of any maintenance plan. Three increasingly complex cases are considered. The first and simplest case assumes that the component is …
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Optimal stress screening for products sold under warranty
… a burn-in program. A multi-component series system with different Weibull distributions for the components are considered. Burn-in is performed at the assembly level and the components are assumed to have different age accelerations under a common stress regimen. Models based on …
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Estimating Cell Capacity for Multi-Cell Electrical Energy System
<p>A Multi-Cell Electrical Energy System is a set of batteries that are connected in series. The series batteries provide the required voltage necessary for the contraption. After using the energy that is provided by the batteries, some cells within the system tend to have a lower voltage than the …
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Fatigue and fracture reliability and maintainability process for structural systems.
… and reliability assessments of structural systems. System reliability can be improved by a maintenance program of periodic inspection and repair or replacement of damaged members. But there are also uncertainities introduced by the inspection process. In summary, the fatigue/fracture …
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Availability analysis of opportunistic age replacement policies
… the availability function for a two component series system in which a component is replaced because of component failure or because it reaches a prescribed age. Also each component replacement provides an opportunity for the replacement of the other component. This last maintenance policy is …
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Development and application of new system reliability analysis methods for complex infrastructure systems
… methods for reliability assessments of complex system events remain elusive, leading to unknown accuracies in the risk assessment. Such a system reliability analysis is computationally challenging, especially when the definition of the system event is complex, the system has a large number of …