Virtual reality (VR) systems still face challenges in simulating the weight of objects. In response to this, the exploration focused on a virtual tactile technology for effectively perceiving the weight of heavy objects in a virtual reality environmen...
Virtual reality (VR) systems still face challenges in simulating the weight of objects. In response to this, the exploration focused on a virtual tactile technology for effectively perceiving the weight of heavy objects in a virtual reality environment and a method for personalizing the weight according to the user's characteristics. Existing technologies for simulating the sense of weight in virtual reality environments are mainly limited to the representation of lightweight objects, and have the limitation of providing a uniform interaction experience that does not reflect the user-specific characteristics.
This study proposed a distance control and rotation control method that can effectively perceiving the sense of weight of heavy objects without the need for specialized hardware. In addition, the effectiveness of personalized interaction was evaluated by applying individual feature parameters. The distance control method measures the speed at which a user lifts an object in the real world, converts it into a specific ratio, and maps it to the movement of a virtual object. The movement of the virtual object is based on position updates, which intentional visual offset between the user's actual movement and the virtual object. The rotation control method is designed to create a visual offset in the rotation of the object by mimicking the torque caused by gravity, reproducing the effect that it becomes difficult to keep an object horizontal as its weight increases. For personalization, we also leveraged the speed at which the user lifts the object as an individual feature, and applied this data to the distance and rotation control methods. Furthermore, the impact of the personalized experience on user immersion and interaction accuracy was analyzed.
The experimental results confirmed that the distance and rotation control methods proposed in this study enhance realism and immersion compared to the existing methods in the heavy object condition. The personalization experiment also confirmed that the personalized experience improves both immersion and accuracy, but when the groups were divided based on the measured speed, the results were found to be inconsistent in terms of realism and workload. The heavier the object, the higher the realism, but participants with lower-than-average speeds experienced increased workload, while the opposite was true for those with higher-than-average speeds.
These results suggest that interaction modalities based on individual characteristics have a significant impact on user experience. This is anticipated to serve as a foundation for developing a system for sharing and embodying others' experiences, with applications in the design of rehabilitation programs, personalized training, and entertainment.