Non-Linear Analysis and Optimization of Weight and Center of Mass for AR Glasses Wear Comfort

This article investigates the effects of weight and Center of Mass (CoM) of AR glasses on subjective assessment during wearing tasks. Utilizing a modular prototyping system, 100 participants evaluated 20 weight-CoM configurations. To address the limitations of linearized Likert scale data, this study constructed a hybrid analytical framework incorporating Generalized Estimating Equations, Extreme Gradient Boosting (XGBoost) with SHAP explanations, and Polynomial Response Surface Methodology. The results revealed significant non-linear coupling effects of weight and CoM on comfort and established a quantitative engineering mapping model based on ordinal data analysis. Furthermore, SHAP analysis identified dynamic stability and nasal comfort as the two most influential perceptual dimensions, jointly accounting for 79.2% of the total SHAP importance. Accordingly, this study proposes engineering optimization guidelines for AR glasses, providing a quantitative basis for lightweighting and weight-distribution optimization of wearable devices.