g input for Three-Axis Inertial Measurement Unit block

For this simulink block, the description of the fifth input is "Contains the gravity, in selected units." It does not specify the coordinate frame. I assume it means the gravity in body-fixed axes, right? Thanks,

[Morteza T]

what simulink block u mean exactly??

[Zack Peters]

Morteza,

He means the "Three-axis Inertial Measurement Unit" block

Answer 1

[Zack Peters]

Yes, the rest of the block accepts inputs in the form of body-fixed axes, so the gravity input should follow along the same lines.

[Luyang Ding]

What if the body itself is rotating？The gravity should be a changing vector with respect to the rotating?