Why FixedStep is not really fixed in simulink?

Question

Armin Mashhadi 2020-5-14

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https://ww2.mathworks.cn/matlabcentral/answers/525518-why-fixedstep-is-not-really-fixed-in-simulink

评论： Armin Mashhadi 2020-5-17

采纳的回答： Fangjun Jiang

在 MATLAB Online 中打开

Hi ,

I was trying to sum outputs of two simulink models. For that, I choosed FixedStep = 0.05 for both,

But results shows two different time array ! So we can not sum up them.

Here is code (Simulink files are attached):

x = [-0.8506 ,-0.4860 ,1.2459,...
    -0.07146 ,46.7021 ,2.60395]; %Parameter #1 for simulink
un = zeros (1,12) ;             % Parameter #2 for simulink
Duration = [0 150];
options  = simset('FixedStep','0.05','SrcWorkspace','current','DstWorkspace','current','solver','ode45','ReturnWorkspaceOutputs','on');
a = sim('VL_u1',Duration,options);
b = sim('VL_u2',Duration,options);