Reply To: Fractional Control Basic

Home Forums FOMCON toolbox: Support forum Fractional Control Basic Reply To: Fractional Control Basic

Pritesh Shah

Regarding FInding Norm 2.

Dear Alekesi,

I want to find norm 2 of fractional order controller.

G2=fotf(tf([0.5 -0.1 0.01],[1 2 1 0]))
Fractional-order transfer function:
Attempt to reference field of non-structure array.

Error in fotf/freqresp (line 14)
a = G.a;

Error in fotf/norm>@(x)freqresp(x,G).*freqresp(-x,G) (line 25)
f = @(x)freqresp(x, G).*freqresp(-x,G);

Error in quadgk/evalFun (line 331)
fx = FUN(x);

Error in quadgk/vadapt (line 250)
[fx,too_close] = f(x);

Error in quadgk (line 149)
[q,errbnd] = vadapt(@evalFun,tinterval);

Error in fotf/norm (line 27)
n = quadgk(f, -dx*1i, dx*1i) / (2*pi*1i);

Please help me for this also.
Also, if you can help me out to explain important of norm 2, it will be useful to me.

Thanking You,