Enhancement of a Product Surveillance Data Base by Digital Signal Processing Techniques

摘要

Several years ago, prior to the establishment of SLA's current digital signal processing facility within the product data system, digitized waveforms were generated by an integrated contractor as part of the product acceptance and surveillance program. Because the signals were recorded at a lower sampling rate and in an incompatible format to those presently processed, they were essentially unusable. As a result of interest in SLA's on-going reliability and life studies of several limited-life components, these signals were resurrected and entered into Sandia's Data Center by a process involving digital filtering and interpolation using Fourier reconstruction methods, followed by the appending of the resulting signals to extant scalar parametric records. The CDC 6600's were used in both the batch mode and interactively with a Tektronix 4012 graphics terminal. The project resulted in a vast increase in accessible information, represented by a 113 percent increase in the number of signals in the aged data files, and thus permitted studies of complete output signals instead of predetermined, often nondescriptive parameters for product life decisions. 13 figures. (ERA citation 03:016320)