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Amiga Format CD 49
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Amiga Format CD49 (2000-01-17)(Future Publishing)(GB)(Track 1 of 3)[!][issue 2000-02].iso
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-serious-
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graphics
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gnuplot-3.7.1doc
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controls.dem
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1999-11-29
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710b
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28 lines
#
# $Id: controls.dem,v 1.1.1.1.2.1 1999/10/11 13:25:20 lhecking Exp $
#
# warning: this demo is SLOW on PCs without math coprocessors!
#
# From _Automatic_Control_Systems_, fourth ed., figure 6-14
# transient response of a second-order system to a unit step input function
#
damp(t) = exp(-s*wn*t)/sqrt(1.0-s*s)
per(t) = sin(wn*sqrt(1.0-s**2)*t - atan(-sqrt(1.0-s**2)/s))
c(t) = 1-damp(t)*per(t)
#
# wn is natural undamped frequency
# s is damping factor
#
wn = 1.0
set xrange [0:13]
set samples 50
set dummy t
set key box
#
# plot c(t) for several different damping factors s
#
plot s=.1,c(t),s=.3,c(t),s=.5,c(t),s=.7,c(t),s=.9,c(t),s=1.0,c(t),s=1.5,c(t),s=2.0,c(t)
pause -1 "Hit return to continue"
reset