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Transient resonance of rolling finned projectiles

DSpace at IIT Bombay

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Field Value
 
Title Transient resonance of rolling finned projectiles
 
Creator ANANTHKRISHNAN, N
RAISINGHANI, SC
PRADEEP, S
 
Subject lock-in
resonance
projectiles
roll lock-in
 
Description Finned projectiles that are intentionally spun are known to become locked in at a resonance condition where the roil rate matches the pitch/yaw frequency. This phenomenon, called roll lock-in, results in an amplification of the trim angle, which can lead to yaw instability. A less severe phenomenon is that of transient resonance where the roll rate locks in at resonance briefly before continuing to build up to the design value. However, the trim amplification during the brief period of resonance may be sufficient to destabilize the projectile. In this paper, the problem of transient resonance for finned projectiles with a centre-of-mass asymmetry is studied. Numerical simulations are used to illustrate transient normal and reverse resonance. No yaw amplification is seen in both cases; rather the absolute value of the complex angle of attack shows a drop during passage through resonance. It is suggested that this is a general feature of the yaw response of finned projectiles undergoing transient resonance.
 
Publisher PROFESSIONAL ENGINEERING PUBLISHING LTD
 
Date 2011-08-27T08:57:45Z
2011-12-26T12:57:50Z
2011-12-27T05:45:33Z
2011-08-27T08:57:45Z
2011-12-26T12:57:50Z
2011-12-27T05:45:33Z
1999
 
Type Article
 
Identifier PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING, 213(G2), 97-103
0954-4100
http://dx.doi.org/10.1243/0954410991532873
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11608
http://hdl.handle.net/10054/11608
 
Language en