Scilab Function
Last update : 18/05/2014
chart - Nichols chart
Calling Sequence
- chart([flags])
- chart(gain [,flags])
- chart(gain,phase [,flags])
Parameters
-
gain: real vector ( gains (in DB))
-
phase: real vector (phases (in degree))
-
flags: a list of at most 4 flags list(sup [,leg [,cm [,cphi]]])
-
sup: 1 indicates superposition on the previous plot 0 no superposition is done
-
leg: 1 indicates that legends are drawn, o: no legends
-
cm: color number (see plot2d) for gain curves
-
cphi: color number (see plot2d) for phase curves
Description
plot the Nichols'chart.
The default values for gain and phase are respectively :
[-12 -8 -6 -5 -4 -3 -2 -1.4 -1 -.5 0.25 0.5 0.7 1 1.4 2 2.3 3 4 5 6 8 12]
[-(1:10) , -(20:10:160)]
Examples
s=poly(0,'s')
h=syslin('c',(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01))
black(h,0.01,100,'(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01)')
chart(list(1,0,2,3));
xbasc()
h1=h*syslin('c',(s^2+2*0.1*15.1*s+228.01)/(s^2+2*0.9*15*s+225))
black([h1;h],0.01,100,['h1';'h'])
chart([-8 -6 -4],[80 120],list(1,0));