frame of reference

(redirected from Fixed coordinate system)
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XOY is fixed coordinate system, the initial point O of which coincides with the hole of the spindle axis rotation; [X.
1] of the upper platform, while a fixed coordinate system O-XYZ is built on point [B.
The derivative chosen is typically the convected time derivative, the Jaumann rate derivative, or a variation of the Jaumann rate derivative in order to retain objectivity with respect to a given fixed coordinate system.