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By Zhijie Zhang, Wei Wang, Wenlian Wang and Daihua Wang


Abstract − The measurement of air shock wave pressure is a typical problem of transient measurement. Because the measurement data in many cases is used to judge the quality of a product, or as a basis for changes being made during a development phase, uncertainty analysis or assessment of measurement data takes a very important role in the process of reporting experimental results. It is very difficult or impossible for most transient measurements to be experimented repeatedly under the same condition, so their uncertainty analysis differs from the method of analyzing static measurement data. The paper gives several main components of uncertainty and their experimental data of the measurement system of air shock wave pressure, especially analyses and processes dynamic sensitivity and overshoot values of the system excited by step pressure signal which is generated by shock tube. The results of uncertainty analysis are presented. The method of dynamic uncertainty provides a kind of solution to analyze and assess the result of single measurement or a few measurements

Topics: transient pressure, measurement uncertainty
Year: 2009
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