simulink仿真的问题，出了个错误求指教！！！
Algebraic state in algebraic loop containing ✀untitled/Subsystem/Sum7✀ computed at time 0.013237025000000012 is Inf or NaN. There may be a singularity in the solution. If the model is correct, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances).
