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Flight Dynamics Principles, 2nd Edition
book

Flight Dynamics Principles, 2nd Edition

by Michael V. Cook
February 2011
Beginner to intermediate content levelBeginner to intermediate
488 pages
17h 21m
English
Butterworth-Heinemann
Content preview from Flight Dynamics Principles, 2nd Edition
Ch11-H6927.tex 20/6/2007 16: 37 Page 298
298 Flight Dynamics Principles
0.01 0.00
Real (w )
204 0
0
1
2
3
4
5
X
X
s-plane
K
a
Short period
mode locus
X
K
a
Phugoid mode
locus
X
– Open loop poles
– Open loop zeros
– Gain test points
Graph scales – rad/s
1.9
0.9
0.5
Imaginary (
jw )
0.5
3.5
1203
500 250 0
0
150
300
X
K
a
0
0.1
Figure 11.15 Root locus plot – incidence feedback to elevator.
is much as might be expected since velocity is the dominant variable in the
mode dynamics. The dominant effect of the feedback is therefore to artificially
increase the magnitude of the derivative m
u
and since m
u
is usually small it is
not surprising that even modest values of feedback gain have a
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Publisher Resources

ISBN: 9780750669276