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How to map a motor angle between 0-360 degrees

#9297  Permalink Top

How to map a motor angle between 0-360 degrees

Jul-25-19 07:43:54

I have a motor model which is running continously and I want to create a variable based on the rotational angle (theta_r) which stays between 0-360 degrees.
In Matlab i solved it like this:

Code:




    theta = theta_r - old_theta_r;

    

    if theta >= 360

        old_theta_r = theta_r

    else

        old_theta_r = old_theta_r;

    end;

The result is:
https://imgshare.io/images/2019/07/25/sequence.md.png

But modelica seems to execute the code differently.

Any tips on how I can create this in Modelica?

Edited by: didrif14 - Jul-25-19 07:48:16
#9298  Permalink Top

Re: How to map a motor angle between 0-360 degrees

Jul-25-19 07:47:58

SOLVED!

#9311  Permalink Top

Re: How to map a motor angle between 0-360 degrees

Jul-28-19 01:11:28

Could you say how you've solved it for the other users?

#9316  Permalink Top

Re: How to map a motor angle between 0-360 degrees

Jul-30-19 06:30:52

It was just a matter of wrong if statement, I solved it like this:


Code:




  theta = theta_m.y - old_theta_m;



  old_theta_m = if theta >= 360 then 

                               theta_m.y 

                          else

                               old_theta_m;

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