Perception and Decision-Making for Multi‑Modal Interaction Based on Fuzzy Theory in the Dynamic Environment

The projection-augmented reality assembly assistance system, which supports natural multi-modal human–computer interaction, has the potential to improve interaction efficiency. However, the effectiveness of the interaction method is compromised by the interference caused by the dynamically changing industrial environment. To address this issue, this study proposed a multi-model interaction model based on fuzzy theory and developed an environment perception decision-making interaction system. This system continuously monitors real-time environment data, evaluates interaction performance, and visually recommends the optimal method to assist users in completing their tasks. A comparative experiment was conducted between the proposed system and a non-environment perception interaction system. The collected data, including interaction success rate, task time, system usability, and user experience, were analyzed. The results demonstrated that the proposed system effectively enhances the adaptability and comfort of computer systems in complex environments and improves communication efficiency between humans and machines.