Hi, I can't simulate complex systems at all with the step() or lsim() command. I have 5 own simulators and all of them can simulate so it is a little bit change that the control package can't manage it. Some code:
pkg load control
q=tf([ -1.46668928632582 38.5234944088261 -1023.42433722006 18055.8729050165 -275471.128598611 3680685.32154243 -40413629.6869944 433109318.542883 -3699840188.09672 32827566143.7738 -225798332168.488 1689921426466.71 -9494747382069.7 60613579740811.5 -278626623858487 1.52747193482069e+15 -5.6883783399098e+15 2.69067309068308e+16 -7.92226372994905e+16 3.25360727881732e+17 -7.2059792475876e+17 2.61175754638012e+18 -3.8909506684981e+18 1.31637705830625e+19 -9.12640045084024e+18 3.78290213329238e+19 1.41630594163597e+19 5.02932079881115e+19 1.29547036349465e+20 1.05983336007477e+19 2.43633391646665e+20 -1.31208497581345e+19 1.04713601706961e+20 7.83465823853832e+18 ],[ 1 17.1698120499521 542.934121038049 7294.98595152311 126155.971925398 1377306.37948524 16829405.6386297 152789570.438515 1448656865.6342 11095921096.5808 85365123037.7488 556372911296.259 3555399791580.02 19799716986834.5 106353561602035 506292672690482 2.29624277698132e+15 9.31618125768562e+15 3.56349262092232e+16 1.22398996473335e+17 3.92373264437545e+17 1.12860046096021e+18 2.99632129507514e+18 7.09934073973815e+18 1.53176948230893e+19 2.91760427412351e+19 4.97010301791734e+19 7.33491370510952e+19 9.42777562297368e+19 1.01604047339533e+20 9.12510568398965e+19 6.44576522525933e+19 3.46367980244933e+19 1.23309424846899e+19 2.4145011614912e+18 ]);
step(q)
%lsim(q,ones(1,1001),[0:.01:10]) %another simulator, same result
am I asking too much that octave should be able to simulate a 34:th order system? I don't have matlab so I can't check if it is supposed to be like this.
Thanks for any input.