Non-inertial reference frame
Simscape / Multibody / Frames and Transforms
This block represents a reference frame with respect to which you can define other frames. The reference frame is generally non-inertial. It can accelerate with respect to the World frame. This block is optional in a model.
R— Reference frame
Local reference frame represented by the block. Connect to a frame line or frame port to define the relative position and orientation of the reference frame.