Abstract: In order to address the issues of long design cycles for system-level test (SLT) equipment caused by high customization requirements and ineffective reuse of design knowledge, a rapid customization design method for SLT equipment is studied. First, the design knowledge prototype of SLT equipment is developed. Additionally, a framework for rapid design of equipment is proposed, including the design knowledge characterization based on core design parameters and a special aggregation method between mechanical modules, i.e., "leaning" behavior, which effectively realizes the storage and reuse of design knowledge for such equipment. Then, based on the developed design knowledge prototype, combined with digital twin technology, we use the digital factory simulation platform developed by our team to encapsulate the SLT equipment component library and build the SLT equipment digital twin design prototype. In this way, the 3D design solutions by parameter configuration can be quickly output. Ultimately, the semi-physical in-the-loop simulation technology is adopted for virtual debugging, making designing, manufacturing, and debugging of the equipment to proceed in parallel and verify each other. Compared with traditional methods, the approach proposed in this paper reduces the cycle time by about 30%, the cost by about 40%, and the labor input by about 60% for designing and debugging of such equipment.

Key words: SLT equipment, digital twin, rapid design, design knowledge representation