Techniques de couplage en fiabilité
Test signal design for failure detection: A linear programming approach
A new methodology for the design of filters that permits failure detection and isolation of dynamic systems is presented. Assuming that the normal and the faulty behavior of a process can be modeled by two linear systems subject to inequality bounded perturbations, a method for the on-line implementation of a test signal, guaranteeing failure detection, is proposed. To improve the fault detectability of the dynamic process, appropriate test signals are injected into the system. All the computations...
Test signal generation for service diagnosis based on local structural properties
The paper presents a new approach to the generation of test signals used in service diagnosis. The tests make it possible to isolate faults, which are isolable only if the system is brought into specific operating points. The basis for the test signal selection is a structure graph that represents the couplings among the external and internal signals of the system and the fault signals. Graph-theoretic methods are used to identify edges that disappear under certain operating conditions and prevent...
Testing and Validation of an Expert System for Advising on Spares for Maintenance Purposes
The busy period of a repairman for redundant repairable systems
The joint determination of price, quality, and capacity: An application to supermarket operations.
The Lorenz transform approach to the optimal repair-cost limit replacement policy with imperfect repair
In this paper, we consider a repair-cost limit replacement problem with imperfect repair and develop a graphical method to determine the optimal repair-cost limit which minimizes the expected cost per unit time in the steady-state, using the Lorenz transform of the underlying repair-cost distribution function. The method proposed can be applied to an estimation problem of the optimal repair-cost limit from empirical repair-cost data. Numerical examples are devoted to examine asymptotic properties...
The Lorenz Transform approach to the Optimal Repair-Cost limit remplacement Policy with Imperfect Repair
In this paper, we consider a repair-cost limit replacement problem with imperfect repair and develop a graphical method to determine the optimal repair-cost limit which minimizes the expected cost per unit time in the steady-state, using the Lorenz transform of the underlying repair-cost distribution function. The method proposed can be applied to an estimation problem of the optimal repair-cost limit from empirical repair-cost data. Numerical examples are devoted to examine asymptotic properties...
The reliability of an element with alternating failure rate
The transient M/G/1/0 queue: Some bounds and approximations for light traffic with application to reliability.
Two-dimensional combination warranty policies