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118 CHAPTER 3. FUNCTIONAL DESCRIPTION OF Xµ
blk = [1,1; 2,2]
[rpbnds1,D1,Dinv1,Delta1,sens1] = mu(Gg,blk)
g3 = ctrlplot(np,{log}); # plot on a log-linear scale
g3 = ctrlplot(rs,g3,{log,line
style=3});
g3 = ctrlplot(rpbnds1,g3,{log,line
style=[4,5]});
g3 = plot(g3,{!grid,title="mu analysis",y
lab="Magnitude",...
legend=["nominal perf.";"robust stab.";...
"robust perf.(upper)";"robust perf. (lower)"]})?
0.1 1 100.01 100
Magnitude
1
2
3
0
4
mu analysis
nominal perf.
robust stab.
robust perf.(upper)
robust perf. (lower)
# Fit transfer functions to D1 & Dinv1 for a mu
# synthesis iteration
[Ds,Dinvs] = musynfit(D1,blk,nmeas,ncntrls,sens1,{!plotweight})
The following illustrates the musynfit screen display after selecting a 2nd order fit and
then a 4th order fit.