A wearable approach to simulating motion perception using head-mounted air propulsion jets
We present HeadBlaster, a novel wearable technology that creates motion perception by applying ungrounded force to the head to stimulate the vestibular and proprioception sensory systems. Compared to motion platforms that tilt the body, HeadBlaster more closely approximates how lateral inertial and centrifugal forces are felt during real motion to provide more persistent motion perception. In addition, because HeadBlaster only actuates the head rather than the entire body, it eliminates the mechanical motion platforms that users must be constrained to, which improves user mobility and enables room-scale VR experiences.
We designed a wearable HeadBlaster system with 6 air nozzles integrated into a VR headset, using compressed air jets to provide persistent, lateral propulsion forces. By controlling multiple air jets, it is able to create the perception of lateral acceleration in 360 degrees. We conducted a series of perception and human-factor studies to quantify the head movement, the persistence of perceived acceleration, and the minimal level of detectable forces.
We then explored the user experience of HeadBlaster through two VR applications: a custom surfing game, and a commercial driving simulator together with a commercial motion platform. Study results showed that HeadBlaster provided significantly longer perceived duration of acceleration than motion platforms. It also significantly improved realism and immersion, and was preferred by users compared to using VR alone. In addition, it can be used in conjunction with motion platforms to further augment the user experience.
- 1st author, presenter
- Project leader
- Software prototyping: Unity VR scenes, hardware driver, telemetry listener
- Hardware prototyping: Pneumatic systems, 3D printing for the nozzle stands
- User studies design/implementation/execution
- Data analysis
- Paper drafting/revision
Thanks Prof. Mike Y Chen for his ideation, funding and supervision of the project, without whom this project would never have existed; Pai-Chien Yen for his superb expertise on pneumatic hardware, circuit design and Arduino programming; Yi-Hsuan Mao, Yu-Hsin Lin, Chung-Miao Tseng and Erick Chandra for their help on studies and/or creating media content for the submission.