필터 지우기
필터 지우기

Fixed step solver explanation needed

조회 수: 1 (최근 30일)
Askic V
Askic V 2024년 2월 14일
댓글: Askic V 2024년 2월 14일
Hello,
I've developed a dedicated MATLAB function to simulate a dynamic response of a system using difference equations. I have created a discrete model and used "User defined function" in the Simulink to call this function. The discrete model needs sample time to calculate its output correctly. This is for example 0.1s. So when I start simulation with fixed step equal to 0.1s everything works fine, but if I leave default setting in the Simulation configuration parameters with fixed step size set to auto, I get a constant value.
Can you please explain, how this "auto" parameter works in Simulink and what "fundamental sample time" is in this case? Does it start with some predefined value somewhere and then reduce its value as simulation progress or something else?
I did not expect to get a a constant value with "auto" setting, but I do understand why fixed step should match the sample time Ts.
Thank you very much!

채택된 답변

Fangjun Jiang
Fangjun Jiang 2024년 2월 14일
A little explaination here.
You can select "auto" in config, if you specify the sample time of your MATLAB Function block as 0.1.
That is a better way to do modeling. Specify the sample time whereever it is needed (sometimes it's better to use the default), let the system determine the simulation step size.
  댓글 수: 1
Askic V
Askic V 2024년 2월 14일
Thank you, it is what I needed.

댓글을 달려면 로그인하십시오.

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Simulink에 대해 자세히 알아보기

Community Treasure Hunt

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

Start Hunting!

Translated by