Optimisation of density of infra-red decoy flare pellets by Taguchi method
- 2 Downloads
Magnesium/Teflon/Viton or MTV pyrotechnic composition has been widely preferred to prepare decoy flares as countermeasures against heat seeking Infra-red (IR) missiles. Though MTV for military applications are available in the global market, the manufacturing process and performance characteristics of these flares have not been explicitly defined. The pellets which are an essential sub-assembly of the flares need to be extensively studied to develop these flares for military applications. The study paper attempts to optimise the density of compacted 50 mm diameter cylindrical pellets. The pyrotechnic composition is initially subjected to various sensitivity tests namely impact, friction and spark to assess the threshold values of initiation of this composition. Three levels of process parameters for pelleting have been considered and L27 array has been selected to represent the process parameters namely charge mass (A), applied load (B), dwell time (C) and their interactions. The Taguchi robust experiment method arrived at the optimal result as A1B3C3 (100 g of charge mass, 8 tons of applied load and 20 s of dwell time). Analysis of Variance (ANOVA) highlighted that parameters A and B significantly influenced the density of the pellets. Finally, general regression equation was derived with R2 value of 0.94.
KeywordsPyrotechnic MTV density Taguchi ANOVA regression
- 5.Koch E C 2002 Metal-Fluorocarbon-Pyrolants: IV: Thermochemical and Combustion Behaviour of magnesium/Teflon/Viton (MTV). Propellants Explos. Pyrotech. 27: 340–351Google Scholar
- 6.Phadke Madhav S 1989 Quality Engineering Using Robust Design, New Jersey: Prentice-HallGoogle Scholar
- 7.Ross P J 1996 Taguchi Techniques for Quality Engineering, 2nd Ed, New York: McGraw-HillGoogle Scholar
- 8.Montgomery D C 2001 Design and Analysis of Experiments. New York: WileyGoogle Scholar