内容简介作者简介 - 科学与工程计算系

%
%
switch flag,
case 0,
[sys,x0,str,ts]=mdlInitializeSizes(angzzy);
case 1,
sys=mdlDerivatives(t,x,u,dampzzy,gravzzy);
case 2,
sys=mdlUpdate(t,x,u);
case 3,
sys=mdlOutputs(t,x,u);
case 9,
sys=mdlTerminate(t,x,u);
otherwise
error(['Unhandled flag = ',num2str(flag)]);
end
% ------ mdlInitializeSizes ------------------------
function [sys,x0,str,ts]=mdlInitializeSizes(angzzy)
sizes = simsizes;
sizes.NumContStates = 2;
sizes.NumDiscStates = 0;
sizes.NumOutputs = 1;
sizes.NumInputs = 1;
sizes.DirFeedthrough = 0;
sizes.NumSampleTimes = 1;
sys = simsizes(sizes);
x0 = angzzy;
str = [ ];
ts = [0, 0];
% -----mdlDerivatives -----------------------------
function sys=mdlDerivatives(t,x,u,dampzzy,gravzzy)
dx(1)=-dampzzy*x(1)-gravzzy*sin(x(2))+u;
dx(2)=x(1);
sys =dx ;
% -----mdlUpdate ----------------------------------
function sys=mdlUpdate(t,x,u)
sys = [ ];
% -----mdlOutputs ---------------------------------
function sys=mdlOutputs(t,x,u)
sys = x(2);
% -----mdlTerminate -------------------------------
function sys=mdlTerminate(t,x,u)
sys = [ ];
(4)
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