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SIMULINK calculation accuracy with double (floating point) accuracy

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Dingguo Lu
Dingguo Lu 2016-1-29
评论： Vineeth Kartha 2016-2-3
I am using SIMULINK to simulate a model. While carrying out the calculation 50% of 2e-4, the ideal result is 1e-4, but the giving result is 9.9999999e-5. In other scenarios, the calculation errors are about 1.6e-20. I will need to compare the result again to a constant of 1-e4.
The Simulink solve is configured to discrete solver with a fixed-step of 2e-7. The calculation accuracy is set to double.
My question is how to set up in Simulink so that I can get exactly what I want as 1e-4, or whether there is a way I can round the given result to 1e-4, where I do not need so much accuracy.
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Vineeth Kartha
Vineeth Kartha 2016-2-3
Hi,
Provide more information like the version of MATLAB, type of OS, bitness of MATLAB and bitness of the OS that you are using(32 bit or 64 bit).
This will help other people from the community to solve the issue you are facing.

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