Question

simulink中怎样用S-function代替微分环节du/dt

Answer 1

function [sys,x0,str,ts]=mdlInitializeSizes

sizes = simsizes;

sizes.NumContStates = 0;

sizes.NumDiscStates = 1;

sizes.NumOutputs = 1;

sizes.NumInputs = 1;

sizes.DirFeedthrough = 1;

sizes.NumSampleTimes = 1;

sys = simsizes(sizes);

x0 = [0 0];

str = [];

ts = [1e-6];

function sys=mdlUpdate(t,x,u)

to=1e-6;

d=(u(1)-x(1))/to;

sys=[u(1) d];

function sys=mdlOutputs

sys=x(2);