仿真中断--derivative input
我的模型在仿真时，设置时间为4s，可到了2.8s时多一点，仿真中断，无法进行，截图如下：Derivative input 1 of 'bsjiabf2/BG/baiC/Integrator' at time 2.815980315877682 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)
这是他的错误叙述，请问错误源自何处？该怎么解决？？希望能得到帮助！！谢谢。QQ93644311;邮箱afei8233@yahoo.com.cn
代数环问题，可以参考
http://forum.vibunion.com/forum/viewthread.php?tid=28597
http://forum.vibunion.com/forum/viewthread.php?tid=56939
http://www.mathworks.com/support/solutions/data/1-16V6S.html?solution=1-16V6S
http://www.mathworks.com/support/solutions/data/1-2S1NR3.html?solution=1-2S1NR3 这应该不是代数环的问题吧？！我理解代数环是怎么一回事！！！还有如下的警告——Warning: Unable to reduce the step size without violating minimum step size of 1e-010 at time 1.000000000000014e-010.Continuing simulation with the step size restricted to 1e-010 and using an effective relative error tolerance of 0.02570638301884068, which is greater than the specified relative error tolerance of 0.001.
Warning: Unable to reduce the step size without violating minimum step size of 1e-010 at time 2.81598151763284.Continuing simulation with the step size restricted to 1e-010 and using an effective relative error tolerance of 1.176948267777999, which is greater than the specified relative error tolerance of 0.001.
Warning: Unable to reduce the step size without violating minimum step size of 1e-010 at time 2.815981517632888.Continuing simulation with the step size restricted to 1e-010 and using an effective relative error tolerance of 1.176935916686738, which is greater than the specified relative error tolerance of 0.001.
请给以帮助，谢谢了！！
回复 楼主 的帖子
求解微分方程问题，出现了Inf或Nan，设置变步长或者把tolerances error 设大些看看吧 可以试着减小步长!!!:lol :lol 可以试着减小步长!!!:lol :lol 可以尝试在反馈上加一个memory模块
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