MBSE-Based Multi-Domain Collaborative Design Method for Cross-Belt Sorters

Cross-belt sorters are the dominant sorting equipment in logistics centres in China, yet their design suffers from difficult multi-domain co-design and long iteration cycles. The root cause is a paradigm that optimises electromechanical-software performance first and verifies logistics requirements only post hoc, making early detection of design defects impossible. Recognising that logistics requirements impose unidirectional, irreversible constraints on the electromechanical-software domain, this paper proposes an MBSE-based multi-domain collaborative design methodology driven by logistics engineering at the top level. At the static level, a five-layer "Logistics–Function–Logic–Physical–Simulation" architecture is constructed with a full-chain requirements traceability matrix that propagates throughput indicators as rigid constraint equations to each discipline. At the dynamic level, the logistics simulation is repositioned as the master model of a co-simulation framework built on FMI 2.0, with electromechanical-software models acting as constrained sub-models. Engineering experiments show that the proposed method improves the first-design throughput achievement rate from 83% to 100%, eliminates design rework, and reduces the design cycle from approximately 10 days to 3 days.