simcondvfun.m

simulink中s函数的设计实例

%SIMCONDVFUN SIMple CONstruction Differential Equation FUNction
%
%JvS 12/2003
%
% x(1)=T(1)
% x(2)=T(2)


function xdot=simcondvfun(t,x)

xdot=zeros(2,1);

%modelparameters
R1=0.1; 		%K/W
R2=1;			%K/W
R3=0.05;		%K/W
C1=4e4;		    %J/K
C2=4e4;		    %J/K

% input
Te=0;			%oC
Ti=20;		    %oC

xdot(1)=(1/C1)* (   ( Ti -x(1))/R1    -   (x(1)-x(2))/R2  );
xdot(2)=(1/C2)* (   (x(1)-x(2))/R2    -   (x(2)-  Te)/R3  );