how to write PID function in .m file

2012 5 14
3 个回答
回答已采纳
更新时间：2023 5 11
8 次查看（30 天）

0 个投票

i need a pid function in my m file. could anyone please write the function.

2 个评论
显示 无 隐藏 无

Hero
Hero 2016-3-18
I do have same question
PUJARI MURAGA
PUJARI MURAGA 2016-12-1
You are having state space model. Suppose I have differential equations then is it possible to do without converting them in state space/laplace ?

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Arkadiy Turevskiy
Arkadiy Turevskiy 2012-5-14
编辑：Arkadiy Turevskiy 2014-10-27

0 个投票

This demo might help.
Arkadiy

2 个评论
显示 无 隐藏 无

sujan
sujan 2012-5-17
thank you,
but my model is a space state model, and it has many tf. and i dont know how to connect space state form and PID controller. so could you please tell me how to use PID in m file which is not in tranfer function. thank you Arkadiy
Arkadiy Turevskiy
Arkadiy Turevskiy 2012-5-17
well, how many inputs and outputs does you system have? If is a single-input-single output system, then everything shown in the demo is still applicable.If you more comfortable dealing with transfer functions, convert your state space system to a transfer function using tf:
ss_sys=ss(a,b,c,d);
tf_sys=tf(ss_sys);

请先登录，再进行评论。

更多回答（2 个）

0 个投票

a way is there : suppose ur tf is (1/a+s) which is to be fed to a pid controler. then the overall tf will be: (Kp+Ki/S+Kd.S).(i/S+a)/(1+(Kp+Ki/S+Kd.S).(i/S+a)). now if you want to give step input then : num=[............] den=[............] tf=num/den ster(tf) so you have to transfer the PID and the tf to a overall transfer function.

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

sujan
sujan 2012-5-17
thank you,
but my model is a space state model and its has 9 state parameters. and i dont know how to use PID in my system. and it is a MIMO system. 4 inputs and 9 outputs. so could you please help me to write a PID function for space state form not in tf. thank you

请先登录，再进行评论。

Daniel
Daniel 2014-10-24

0 个投票

Please where's the demo? I'm also trying to write a matlab function for pid using the user-defined function block

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Suyog
Suyog 2023-5-11
How to write pid function in m file
Sam Chak
Sam Chak 2023-5-11
Hi @sujan
  1. You can use the pid() function directly.
  2. You can describe that in transfer function.
  3. You can model it using the descriptor state-space.
  4. Finally, you can put the pid equation in the way that is similar to the ordinary differential equation (ODE).

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 PID Controller Tuning 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by