[求助]滑模控制系统仿真出错
 

错误报告：State derivatives returned by S-function 'chap4_4plant' in 'out_sim/S-Function3' during flag=1 call must be a real vector of length 6.
其中chap4_4plant为被控对象是用s函数写成的。一共有六个状态变量，希望高手不吝赐教！