Level 1 S-Function normalise state variable

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Ryan 2013-7-25

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https://ww2.mathworks.cn/matlabcentral/answers/83105-level-1-s-function-normalise-state-variable

As part of a 6DoF aircraft simulation that I am writing, I am using a Level 1 S-Function (was given it as a framework, may upgrade to Lvl 2 if necessary). As part of this simulation I need to normalise a quaternion. The code to normalise the quat is really easy, I just don't know how to modify the continuous state variables directly.

Thanks in advance, Ryan.

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Kaustubha Govind 2013-7-25

You can type "sfcndemo_limintm" at the MATLAB prompt to open a model that contains an S-function with a continuous state. Typically, the continuous state is updated in the flag==1 case. Look for the mdlDerivatives function.

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