S函数运行报错，返回的状态导数必须是长度为3的实数向量 这类问题怎么解决？

[weixin_38055888]

请求大佬 指点下！错误如下图所示 报错的这部分的代码如下： function [sys,x0,str,ts]=s_function2(t,x,u,flag) switch flag, case 0, [sys,x0,str,ts]=mdlInitializeSizes; case 1, sys=mdlDerivatives(t,x,u); case 3, sys=mdlOutputs(t,x,u); case {2, 4, 9 } sys = []; otherwise error(['Unhandled flag = ',num2str(flag)]); end function [sys,x0,str,ts]=mdlInitializeSizes sizes = simsizes; sizes.NumContStates = 3; sizes.NumDiscStates = 0; sizes.NumOutputs = 2; sizes.NumInputs = 2; sizes.DirFeedthrough = 0; sizes.NumSampleTimes = 0; sys=simsizes(sizes); x0=[0.03;0.01;2]; str=[]; ts=[]; function sys=mdlDerivatives(t,x,u) ap=9.425;be=1700000000;cd=0.65;w=0.001; vt=280;ps=4000000;p=9000;ctp=0.00001; ks=0.6;mt=60;fc=270;fm=500;vs=0.05; ut=u(1); f=u(2); sys(1)=x(2); sys(2)=1/mt(-10000x(2)+apx(3)-f); sys(3)=4be/vt(cdkswsqrt((ps-sign(x(1))x(3))/p)ut-apx(2)-ctpx(3)); function sys=mdlOutputs(t,x,u) sys(1)=x(1); sys(2)=x(2);

[weixin_48112080]

兄弟 解决了吗 能交流一下吗

[j521867]

同问