Making the "lyap" function work in Simulink and RTW
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Hi all,
I have a Simulink model that uses Matlab's "lyap" function within a Level-2 M-file S-function. Unfortunately, this type of S-function is not compatible with Real-Time Workshop without the help of a TLC file. The "lyap" function doesn't work inside an embedded Matlab function either. I tried that before employing the current S-function.
Writing a TLC file from scratch is beyond my abilities at the moment, and I'm unsure whether this method would work. Suggestions, anyone? Thanks.
Cheers Joe
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Kaustubha Govind
le 19 Oct 2011
Unfortunately, there is no way to generate code from the lyap function currently. However, the typical approach in embedded systems for mathematical functions is to create a lookup-table if you know the full range of your input data. I don't know if interpolating the results of the LYAP function makes sense, but if it does, you could try implementing it as an n-D Lookup Table where the Y-data is the output of the LYAP function - Simulink Coder will compute the values for the given X-data and inline the outputs into the generated code.
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