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Full-Text Articles in Engineering
Knowledge-Based Fault Detection Using Time-Frequency Analysis, Venkata S. Vongala
Knowledge-Based Fault Detection Using Time-Frequency Analysis, Venkata S. Vongala
LSU Master's Theses
This work studies a fault detection method which analyzes sensor data for changes in their characteristics to detect the occurrence of faults in a dynamic system. The test system considered in this research is a Boeing-747 aircraft system and the faults considered are the actuator faults in the aircraft. The method is an alternative to conventional fault detection method and does not rely on analytical mathematical models but acquires knowledge about the system through experiments. In this work, we test the concept that the energy distribution of resolution than the windowed Fourier transform. Verification of the proposed methodology is carried …
Blind Fault Detection Using Spectral Signatures, Pallavi Chethan
Blind Fault Detection Using Spectral Signatures, Pallavi Chethan
LSU Master's Theses
This work studies a blind fault detection method, which only analyses a system's output signal for any change in the characteristics from pre-fault to post-fault to identify the occurrence of faults. In our case the fault considered to develop the procedure is change in time constant of an aircraft's aileron-actuator system and its simplified version - a position servo system. The method is studied as an alternative to conventional fault detection and identification methods. The output signal is passed through a filter bank to enhance the effect of a fault. The Short time Fourier transform is performed on the enhanced …