Calculate Time Constant of Discrete or Continuous Transfer Function

38 次查看（过去 30 天）

Russell Senior 2017-10-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/362879-calculate-time-constant-of-discrete-or-continuous-transfer-function

评论： Matheus WV 2020-2-19

Is there a function to provide the value of the time constant of a Continuous or Discrete time transfer function? I mean, I know how to calculate it by hand, but it seems this is so fundamental, I should find a function like tau = TimeConstant(G(s),'step')... Or it should be an output of stepinfo...

Seems such a basic thing in controls, or maybe it's so trivial, no one feels the need for it? Perhaps my google-fu is just really weak tonight?

Thanks for any feedback.

Edit: I should clarify that at this point, I'm just looking at 1st or 2nd order systems.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Birdman 2017-10-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/362879-calculate-time-constant-of-discrete-or-continuous-transfer-function#answer_287383

TimeConstant.m

Try this function. It takes a first order continuous transfer function as an input and outputs the time constant of it. Hope it helps.

5 个评论
显示 3更早的评论隐藏 3更早的评论

Russell Senior 2019-5-8

2nd order transfer functions still only have one time constant, but they also have a natural frequency and damping coeffecient.

Matheus WV 2020-2-19

TimeConstant.m

There was an error in your function: "den" was changed before it was used in the "num" calculation, so "num" would remain the same, as den(len) equals 1.

Here the corrected version.

请先登录，再进行评论。