function?[sysx0strts]?=?spacemodel（txuflag）
switch?flag
case?0
????[sysx0strts]=mdlInitializeSizes;
case?1
????sys=mdlDerivatives（txu）;
case?3
????sys=mdlOutputs（txu）;
case?{249}
????sys=[];
otherwise
????error（[‘Unhandled?flag?=?‘num2str（flag）]）;
end
function?[sysx0strts]=mdlInitializeSizes
sizes?=?simsizes;
sizes.NumContStates??=?1;
sizes.NumDiscStates??=?0;
sizes.NumOutputs?????=?2;
sizes.NumInputs??????=?6;
sizes.DirFeedthrough?=?1;
sizes.NumSampleTimes?=?0;
sys?=?simsizes（sizes）;
x0??=?[0];
str?=?[];
ts??=?[];
function?sys=mdlDerivatives（txu）
xm=u（1）;
dxm=u（2）;
ddxm=u（3）;
x1=u（4）;
dx1=u（5）;

e=x1-xm;
de=dx1-dxm;

nmn=6;
s=de+nmn*e;
v=ddxm-2*nmn*de-nmn^2*e;

gama=0.5;
sys（1）=-gama*v*s;
function?sys=mdlOutputs（txu）
xm=u（1）;
dxm=u（2）;
ddxm=u（3）;
x1=u（4）;
dx1=u（5）;

e=x1-xm;
de=dx1-dxm;

nmn=6;

mp=x（1）;
ut=mp*（ddxm-2*nmn*de-nmn^2*e）;

sys（1）=mp;
sys（2）=ut;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-11-04?08:41??chap1\
?????文件?????????954??2010-09-26?11:23??chap1\chap1_1ctrl.m
?????文件?????????961??2010-11-12?17:44??chap1\chap1_1input.m
?????文件?????????734??2010-09-26?11:19??chap1\chap1_1plant.m
?????文件?????????327??2010-09-29?15:30??chap1\chap1_1plot.m
?????文件???????19953??2010-12-01?20:06??chap1\chap1_1sim.mdl