transform principal moment of inertia to global coordinates
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Hi,
I have a CAD program that gives the prinicpal moments of inertia and their direction (as direction cosines). I have another program that accepts an input of moments of inertia. The co-ordinate systems don't always line up, so I wanted to be able to transform these principal moments of inertia to the global co-ordinate system.
Does anyone know any good references describing how to do this? Most of what I can find is about doing things the other way (calculating the principal axes/moments of inertia).
Thanks,
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