MR-MultiTwin: A Mixed Reality Platform for Multi-User Control of Industrial Digital Twins

As Industry 5.0 accelerates, real-time, multi-user collaboration with digital twins (DTs) becomes increasingly essential. However, current systems struggle with spatial synchro-nization, collaborative execution, and natural interaction at scale. We introduce MR-MultiTwin, a mixed reality (MR) platform that addresses these gaps through three key innovations: (1) a shared-anchor-based spatial mapping method for aligning multi-user locations within a unified coordinate system; (2) a role-based collaboration framework that synchronizes task states, user identities, and control rights in real time; and (3) AI-powered multimodal interaction, integrating gesture, gaze, and voice for seamless DT control. Built on an edge-cloud architecture, MR-MultiTwin has been validated in smart manufacturing and inspection scenarios, showing notable gains in coordination effi-ciency, interaction usability, and deployment feasibility-paving the way for scalable industrial MR systems.