藉由環繞於頭部周遭的慣性力式規律震動回饋增進虛擬實境動態體驗

Abstract

我們提出 DrivingVibe，探索如何利用環繞於頭部周遭的震動回饋設計去增進虛擬實境中的行車動態體驗。在整個設計流程之中，我們完成了三個裝置設計的迭代並進行了一系列共招募 66 名受測者的形成性與總結性研究，最後發展出兩套使用了 360 度震動觸覺頭帶的回饋規律設計：鏡像與 3D 慣性力式規律。鏡像設計延伸手持控制器的震動觸覺規律來均勻的驅動頭帶。 3D 慣性力式設計則提供對應慣性力的方向性震動規律，包括：離心力、水平方向的加速度與減速度、以及粗糙地形導致的垂直移動。我們進行了一個 24名受測者的使用者體驗評量研究，體驗內容包含被動的乘客模式與使用帶有震動回饋的手持控制器操作的主動駕駛模式。研究結果顯示兩套 DrivingVibe 的設計皆能顯著且效應大地增進體驗的真實感、沉浸感、與樂趣 (p值<.01)，在整體偏好的方面， 88\% 的使用者偏好 DrivingVibe，並且在這些人之中有 67\% 的人偏好 3D 慣性力式設計。

We present DrivingVibe, which explores vibrotactile feedback designs around the head to enhance VR driving motion experiences. Throughout our design process, we completed three device design iterations and conducted a series of formative and summative user studies with a combined total of 66 participants. We arrived at two feedback pattern designs that use a 360\degree vibrotactile headband: 1) mirroring and 2) 3D inertia-based patterns. The mirroring design extends the vibrotactile patterns of the handheld controllers to actuate the headband uniformly. The 3D inertia-based design provides directional vibration patterns corresponding to inertial forces, including: i) centrifugal forces, ii) horizontal acceleration/deceleration, and iii) vertical motion due to rough terrain. We conducted a 24-person user experience evaluation in both passive passenger mode and active driving mode, with the active mode using handheld controllers with vibrotactile feedback. Study results showed that both DrivingVibe feedback designs significantly improved realism, immersion, and enjoyment (p<.01) with large effect sizes. In terms of overall preference, 88\% of users preferred DrivingVibe, and among these users, 67\% preferred the 3D inertia-based design.