Derivative input 1 of block 'GMM11yue6/力平衡方程1/Transfer Fcn' at time 1.002139354371776 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)
这个错误是什么意思，谢谢！