Altering the time-step size.

Question

Manahara Manatunga 2016-1-1

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https://ww2.mathworks.cn/matlabcentral/answers/262349-altering-the-time-step-size

评论： Walter Roberson 2023-9-24

Hi all,

I am trying to model an engine on Simulink. The engine has a non-uniform RPM rate, which depends on the torque and the moment of inertia of the flywheel mass.

I want to step the simulation every 0.25 degrees. Since the RPM is not constant, the time taken to crank the engine by 0.25 degrees varies. Is there any way I can define the time step size while running the simulation?

This way I can adjust the time step to always increment the crank angle by 0.25 degrees every time step.

Thanks in advance.

Manahara

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Answer 1

kintali narendra 2023-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/262349-altering-the-time-step-size#answer_1316837

use a ramp signal to with a slope of 0.25

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Walter Roberson 2023-9-24

That would be a constant slope, and the time taken to crank the engine by 0.25 degrees would always be the same. However, @Manahara Manatunga has a situation where the time required to turn by a fixed angle varies.

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