Published 6 issues per year
ISSN Print: 2150-766X
ISSN Online: 2150-7678
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ULTRASOUND METHOD: TOWARDS THE AUTOMATION OF THE SOLID PROPELLANT BURNING RATE DETERMINATION
ABSTRACT
For three decades, ONERA has been promoting a method based on ultrasound wave propagation to determine the burning rate of solid propellants. Since 1996, the measurement equipment has evolved from an analog device to a digital ultrasound system integrating new technologies, thanks to Sofratest Co. This paper will present and describe the concept of an industrial version of the software written at ONERA and devoted to laboratory applications. "Industrial version" means that the user does not require any detailed knowledge of the ultrasound technique; basic pieces of information should be found in the "user's manual." The software development was carried out keeping in mind reliability improvement and data processing optimization. The reliability was related to code robustness and its improvement consisted in validating the algorithms used for a well-defined application: burning rate determination as a function of pressure, the basic industrial control of the ballistic properties of any propellant. The optimization was linked to the software operation which had to be made more user-friendly and attractive in terms of graphic panels. Another important point was the repeatability and reproducibility (R&R) of the ultrasound technique coupled to the software. We tried to evaluate these parameters through a series of tests.
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