An Improved Smoothing Method for Closed Burning Rate Data Reduction,
NAVAL ORDNANCE STATION INDIAN HEAD MD
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This paper describes a variable smoothing method which was developed to compute closed bomb burning rates. For the variable smoothing method, the smoothing interval is gradually decreased as the pressure increases. The data can be smoothed to within one point of the silvering pressure without any inaccuracies resulting from using data in that region. The variable smoothing method was used for computing burning rates for Navy LOVA and NACO propellant and was found to be preferable over the fixed smoothing method because accurate burning rates could be obtained to much higher pressures. Also in this report, a smoothing routine with a second-degree polynomial fit is compared to a routine with a third-degree polynomial fit. The second-degree polynomial required a considerably smaller smoothing interval than the third-degree polynomial for a smooth pressure-time curve.