s函数中如何处理变系数的状态方程 求指点
X'=A*X+B*Uy=C*x+D*U;用的是连续状态，编写s函数时因为矩阵A中有未知数w，具体的程序如下：
function = quanjie(t,x,u,flag)
Rs=1.405;
Ls=0.178039;
Rr=1.395;
Lr=0.178039;
Lm=0.1722;
Rsr=Rs+(Lm/Lr)^2*Rr;
Ls1=Ls-Lm^2/Lr;
Tsr=Ls1/Rsr;
Tr=Lr/Rr;
switch flag,
case 0,
=mdlInitializeSizes;
case 1,
sys=mdlDerivatives(t,x,u);
case 3,
sys=mdlOutputs(t,x,u);
case {2,4,9}
sys = [];
otherwise
DAStudio.error('Simulink:blocks:unhandledFlag', num2str(flag));
end
function =mdlInitializeSizes
sizes = simsizes;
sizes.NumContStates= 4;
sizes.NumDiscStates= 0;
sizes.NumOutputs = 4;
sizes.NumInputs = 2;
sizes.DirFeedthrough = 1;
sizes.NumSampleTimes = 1; % at least one sample time is needed
sys = simsizes(sizes);
x0= ';
str = [];
ts= ;
simStateCompliance = 'UnknownSimState';
function sys=mdlDerivatives(t,x,u)
A=[-1/Tsr 0 Lm/(Ls1*Lr*Tr) Lm*wr/(Ls1*Lr)
0 -1/Tsr-Lm*wr/(Ls1*Lr)Lm/(Ls1*Lr*Tr)
Lm/Tr0 -1/Tr -wr;
0 Lm/Tr wr -1/Tr ];
B=';
sys = A*x+B*u;
function sys=mdlOutputs(t,x,u)
C=[1 0 0 0
0 1 0 0
0 0 0 0
0 0 0 0];
sys = C*x;
wr是要通过观测器出来的4个量计算的，怎么把wr值给入到矩阵中进行运算啊？我理解的s函数输入参数外，其他输入为状态变量的输入。请高人指教，感激！
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