function?[sysx0strts]?=?csfunc（txuflag）
Iz=3885;m=1500;a=1.463;b=1.585;vx=25;
kf=-62618;
kr=-70000;
A=kf/m;B=（kf+kr）/（vx*m）;C=（（（kf*a-kr*b）/（vx*m））-vx）;
D=（a*kf）/Iz;E=（（a*kf-b*kr）/（vx*Iz））;F=（（a^2*kf-b^2*kr）/（vx*Iz））;

switch?flag???????????????????????????????????????????????????????????????%根據(jù)參數(shù)flag切換操作
??case?0
????[sysx0strts]=mdlInitializeSizes（ABCDEF）;?%初始化模塊，如果flag=0，調(diào)用mdlInitializeSizes函數(shù)，傳遞參數(shù)txu，輸出為sysx0strts
??case?1
????sys=mdlDerivatives（txuABCDEF）;??%連續(xù)狀態(tài)計算模塊，如果flag=1，調(diào)用mdlDerivatives函數(shù)，傳遞參數(shù)txu，輸出為sys
??case?3
????sys=mdlOutputs（txuABCDEF）;??????????????????????????????????????????%輸出模塊，如果flag=3，調(diào)用mdlOutputs函數(shù)，傳遞參數(shù)txu，輸出為sys
??case{249}
????sys=[];?????????????????????????????????????????????????????????????%計算下一個采樣