trasfer function to work space

2019 12 8
4 个回答
更新时间：2019 12 17
6 次查看（30 天）

回答（4 个）

Walter Roberson
Walter Roberson 2019-12-12

0 个投票

You appear to have a simulink model named stepinfo somewhere on your path that is interfering with calling the Control Systems Toolbox stepinfo() functions.
I do not find any simulink model named stepinfo in my R2019a installation. Also, the GSCreatingModelsDT.mlx example does not have any invocation of Simulink, and does not create any variable named simout
You should check
which -all stepinfo
to try to figure out where the stepinfo model is coming from.
Sergiy Kuzmych
Sergiy Kuzmych 2019-12-16
编辑：Sergiy Kuzmych 2019-12-16

0 个投票

I dont actually undesrand you. My purpose is to get the output of these two tranfer function and work with this output. For example get characteristics

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Walter Roberson
Walter Roberson 2019-12-16
Execute the command
which -all stepinfo
You will find a stepinfo SIMULINK model listed (otherwise you would not be getting the error message that you are getting). Delete or rename that SIMULINK model.
It is normal for the command to list two .m functions for stepinfo, in
toolbox/shared/controllib/engine/stepinfo.m
toolbox/control/ctrlanalysis/@DynamicSystem/stepinfo.m
but on your system there will be a third entry that names a simulink .mdl or .slx file; that .mdl or .slx is interfering with your code.

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Sergiy Kuzmych
Sergiy Kuzmych 2019-12-16

0 个投票

Actually i wanted to take characteristics of tranfer function but i dont know how. I knew about ltiview and i was trying to use this function and i wanted to get the output from my transfer functions but then i discovered linear analysis tool that helped me a lot. The subject is Control engineering from kpi fict auts
Characteristics.png
Sergiy Kuzmych
Sergiy Kuzmych 2019-12-16
编辑：Sergiy Kuzmych 2019-12-16

0 个投票

The answer is to mark lines in simulink like in this video
https://www.mathworks.com/videos/transfer-functions-in-simulink-part-2-extracting-transfer-functions-106147.html
and than use
stepinfo(tout)
and get characteristics
>> stepinfo(out.tout)
ans =
struct with fields:
RiseTime: 80
SettlingTime: 100
SettlingMin: 9
SettlingMax: 10
Overshoot: 0
Undershoot: 0
Peak: 10
PeakTime: 102
but they are different from previous picute. Why?

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Walter Roberson
Walter Roberson 2019-12-17
Are you still getting the error message about Simulink model stepinfo being called with the incorrect number of arguments?
Walter Roberson
Walter Roberson 2019-12-17
The original question appears to be solved then, and it is not at all clear to me what your current question is?
I would suggest opening a new question.
I am not experienced in control system use of Simulink, so I will probably not be able to answer

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