关键词: 产品维修, 狭小空间, 全局可接近性锥, 深度信息, 人体手臂

Abstract: To improve the planning efficiency of maintenance schemes in a narrow space of complex mechanical products,a geometric analysis method of operation feasibility was presented.Based on the existing method of global accessibility cone with depth (GACd),and considering the factor that maintenance operator conducting operations through tools with his arms,the simplified operation models were built to describe the geometric properties and operational characteristics of maintenance tools and maintenance personnel's arm.The optimized triangle patch projection method was utilized to construct GACds for maintenance tools and maintenance personnel's arm respectively.Through analyzing the spatial relationship among GACds and simplified operation models,the feasibility of maintenance operation was completed.Moreover,the adequacy index was constructed to measure the adequacy of operation space,and the feasibility of operator's arm in narrow space was analyzed.The proposed geometric calculation method was compared with a 3Dsimulation method by taking a simulated aerospace electronic cabin as an example,and the results showed that the proposed method was reasonable and effective.

Key words: product maintenance, narrow space, global accessibility cone, depth information, human arm