The main motion for this device is to tilt, but the device can simultaneously translate radially and is also equipped with a degree of freedom that provides head on neck roll tilts (passive or active).
Perceived tilt and translation during variable-radius swing motion with congruent or conflicting visual and vestibular cues. Rader, A. A., Oman, C. M., & Merfeld, D. M. (2011). Exp Brain Res, 210(2), 173-184.