how to solve the integer multiple of fixed-step size

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Ryan loh 2021-5-19

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https://ww2.mathworks.cn/matlabcentral/answers/833873-how-to-solve-the-integer-multiple-of-fixed-step-size

评论： Nur Aida Ariffah 2023-8-25

when play the drive train

Invalid setting for fixed-step size (10000000.0) in model 'Drivetrain'. All sample times in your model must be an integer multiple of the fixed-step size.

Component:Simulink | Category:Model error

The sample time period (5.0E-5) of 'Drivetrain/Drivetrain/Discrete-Time Integrator ' is not an integer multiple of the fixed step size (10000000.0) specified for model.

Component:Simulink | Category:Model error

The sample time period (5.0E-5) of 'Drivetrain/Drivetrain/Discrete-Time Integrator1' is not an integer multiple of the fixed step size (10000000.0) specified for model.

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Answer 1

Aghamarsh Varanasi 2021-5-25

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Hi,

The Fixed-step size is the time interval after which the solver solves a Simulink model. Hence, all the sample times in a Simulink model must be an integer multiple of the fixed-step size. In your example, the fixed-step size is 10000000(e7). And the sample time for the block 'Drivetrain/Drivetrain/Discrete-Time Integrator' is '5e-5', which is not an integer multiple of e7.

To solve this issue, you can set the fixed-step size of the model to be 'auto'. You can find this settings in the Solver > Solver Details > Fixed-Step Size in the Model settings.

Hope this helps