The reason of orient to zpoint-xpoint

Hello Everyone,

Could some one help to make me my two thoughts clear.

first:

We can only chose (orient to zpoint-xpoint ) to make the dependency of orientation, but never zpoint-ypoint.

Is the reason that the Euler angle should be 313, it means rotation about ZXZ? There may be a singular result if the y-angle in n*180deg .

second:

For example. I want to make the y-direction of the construction frame( cm-marker, inertia_frame marker) as the axial-axis of steering column part with forced. There may be occur error in particular orientation during simulation?

Thanks a lot

Zhenhui Xu

0 damianh over 4 years ago

I think you can orient on any axis you choose. The example in the manual is the Y-Axis?
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0 zhenhui xu over 3 years ago

@Damian Harty

hi, thanks for response.

I found one case article and work out my question.

Principle, we can not set Z axis to any direction, that means, also can not set Y axis to any direction.

simcompanion.mscsoftware.com/.../index
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0 Jesper Slattengren over 3 years ago

That article is a little bit pessimistic. Particularly if you have the "bad" orientation in your model, Adams will fix that immediately at t=0 and you will never see any problem with it.

That said, when I model systems with many rotating parts (think a chain or tank-track) I make sure that the Z-axis of the parts are all oriented "sideways" so that they never align with global Z during normal simulations.

Go ahead and parameterize the model the way that makes most sense to you and in almost all cases it will work out just fine.
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