编写MATLAB s-function状态方程中的未知数怎么给进去的问题?状态方程如下：

编写MATLAB s-function状态方程中的未知数怎么给进去的问题?状态方程如下：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 [sys,x0,str,ts,simStateCompliance] = 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,[sys,x0,str,ts,simStateCompliance]=mdlInitializeSizes;case 1,sys=mdlDerivatives(t,x,u);case 3,sys=mdlOutputs(t,x,u);case {2,4,9}sys = []; otherwiseDAStudio.error('Simulink:blocks:unhandledFlag',num2str(flag));endfunction [sys,x0,str,ts,simStateCompliance]=mdlInitializeSizessizes = 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 neededsys = simsizes(sizes);x0 = [0 0 0 0]';str = [];ts = [0 0];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/Tr 0 -1/Tr -wr;0 Lm/Tr wr -1/Tr ];B=[1/Ls1 1/Ls1 0 0]';sys = A*x+B*u;function sys=mdlOutputs(t,x,u)C=[1 0 0 00 1 0 00 0 0 00 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!