Thermographic Detection of Defects in Refractory Composites

Significant effort and resources are being expended to develop ceramic-matrix composite (CMC), metal-matrix composite (MMC), and polymer-matrix composite (PMC) materials for...

Diagnosing Helicopter Gearboxes Using Connectionist Networks

A method of automated diagnosis of helicopter gearboxes involves processing of selected features of digitized outputs of vibration sensors via structure-based connectionist networks...

Sputter Deposition of Pure and Fluoropolymer-Filled Al₂O₃

Experiments have shown that nonreactive ion-beam sputtering can be used to deposit a transparent film of aluminum oxide on a polycarbonate, silicon, or fused-silica substrate....

Wavelet Analysis of Flight-Test Data on Aeroelasticity

A method of computational filtering enables the removal of distortions from flight-test data. The method is built upon and adapts the methods of wavelet-transform analysis to the particular...