home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir27
/
grphca22.zip
/
EXAMPLES.ZIP
/
CONTROL.PLT
< prev
next >
Wrap
Text File
|
1993-02-03
|
746b
|
31 lines
paper size 11 by 8.5
#
# 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
#
frame
title 'TRANSIENT RESPONSE OF A SECOND-ORDER SYSTEM'
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
map x 0 13
samples 50
dummy t
#
# plot c(t) for several different damping factors s
#
color lred
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)
color lblue
draw x y
xlabel 'time'
ylabel 'response'