[讨论]how to deal with this problem!3q

lct0811

Derivative input 3 of block 'out3c/State-Space1' at time 4.05107706291614 is Inf or NaN. Stopping simulation. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)
以上是我用LMI做一个三阶鲁棒控制器仿真时，出现的问题系统的提示
怎么解决！
谢谢