Browsing by Subject "Electric fault location"
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Item A dual-mode fault-diagnosis technique for analog non-linear electronic systems(Texas Tech University, 1980-05) Ngo, Quoc DinhNot availableItem A fault diagnosis algorithm for nonlinear analog circuits and systems(Texas Tech University, 1980-08) Hsieh, Ming-chengA fault detection algorithm for nonlinear analog circuits is developed on the basis of the unique characteristics of the solid stage nonlinear device. A large-scale system can be decomposed into subsystems by driving the nonlinear devices into their cut-off regions. The reversed bias applied to the nonlinear devices wi11 reveal the failures caused by the shorted or leaky devices. The resultant decoupled linear subsystems are of much smaller simension. Test signals can be applied to each subsystem as long as it is decoupled from the other. A diagnosis scheme is developed for testing linear subsystems. The test results are used to construct the test signature table to indicate the failed linear components in each subsystem. The overall system which, is free of shorted or leaky devices and/or failed linear components, is then put back to the normal operating condition. The static operating point and the dynamic performance of each nonlinear device will give the indication of failures caused by opened or deteriorated devices. The fault diagnosis for the large-scale system is thus completed. Several numerical examples are given to illustrate the test scheme and the possible implementation of the automatic test system.Item A measure of testability and its application to test point selection(Texas Tech University, 1977-12) Sen, NeerajNot availableItem A spectral theoretic approach to fault analysis in linear sequential circuits.(Texas Tech University, 1975-08) Sangani, Suresh HimatlalNot availableItem Computer implementation of term expansion in fault analysis.(Texas Tech University, 1975-08) Tsui, Ying-LongNot availableItem Failure prediction for an on-line maintenance system in a Poisson Shock environment(Texas Tech University, 1977-12) Lu, Keh-ShewAn analog system subject to the Poisson Shock is modeled using past performance data. Failure Dynamics of the system is estimated by curve fitting techniques. Algorithms for fault prediction in an on-line maintenance process are described. Several sequential refinement schemes are introduced to improve fault prediction. Some formulas and properties of system's statistics have been developed. A decision rule is introduced which is based on the criteria of simultaneously maximizing lifetime and minimizing the cost of on-line failures. Poisson Shock generator is implemented by computer for simulation of the on-line maintenance process, The computer simulations of a perfect, no measurement errors and identical drifting parameters, system are presented, The simulations of an imperfect system are studied by adding a noise to the system performance data.Item Fault detection in logical circuits.(Texas Tech University, 1975-05) Majumdar, SamprakashNot availableItem On fault identification in certain diagnosable systems(Texas Tech University, 1983-08) Krothapalli, Virabrahma PrasadNot availableItem On the implementation of an analog ATPG(Texas Tech University, 1983-05) Wey, Chin-longNot availableItem Search techniques for the solution of the fault diagnosis equations(Texas Tech University, 1977-12) Chen, Henry Shiou-MingNot availableItem Statistical analysis of a periodic maintenance system.(Texas Tech University, 1975-08) Tung, Leonard JengNot available