|Table of Contents|

Method for Extraction of Two-variable Function of Projectile Drag Coefficient from Radar Measured Data

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年06期
Page:
790-795
Research Field:
Publishing date:

Info

Title:
Method for Extraction of Two-variable Function of Projectile Drag Coefficient from Radar Measured Data
Author(s):
QIAN Ming-weiWANG Liang-ming
School of Power Engineering,NUST,Nanjing 210094,China
Keywords:
aerodynamics projectiles drag coefficient radar data processing firing table trajectory
PACS:
TJ410.1
DOI:
-
Abstract:
Aiming at the problem of the plateau firing table compilation,the expression of two-variable function of projectile drag coefficient varying with the mach number and altitude above sea level is presented in this paper.The method for the extraction of the two-variable function of projectile drag coefficient from radar data is also presented.The fitting function is the non-uniform B-spline,and the variety of projectile drag coefficient can be made closer to the actual situation.The computational technique for extraction of the two-variable function of projectile drag coefficient is derived and the computer program diagram is shown in the text.The projectile drag coefficient obtained by processing the radar measured data is used in a trajectory solver.The plateau firing result shows that under the firing angle of 20°and 50°,the differences of the calculation ranges of the traditional method and the experiment range are-1.30% and-2.28%,and those of the proposed method and the experiment range are-0.21% and-0.26%.By using the proposed method,the computational precision of trajectory of projectiles is improved.The illustration shows this method is feasible in practice.

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Last Update: 2012-11-19