Fixed Frame - a stationary frame with a fixed displacement and orientation relative to ground

Flexible Beam - a flexible beam with axial, lateral, and torsional deformations

Flexible Beam Frame - a frame with a fixed displacement relative to the base of a flexible beam

Rigid Body - center of mass (CoM) frame with associated mass and inertia matrix

Rigid Body Frame - a frame with a fixed displacement and orientation relative to a rigid body center of mass (CoM) frame