关键词: 维修性虚拟仿真, 虚拟维修姿态, 飞机狭小空间, 姿态优化准则, 多目标优化

Abstract: Maintainability virtual simulation is an important tool for aircraft structures and systems design, in which the rapid generation of appropriate virtual human maintenance postures is crucial to the efficiency and feasibility of maintainability analysis. Aiming at the problems of low efficiency and limited applicability of the current virtual human maintenance posture solving method, a virtual maintenance posture hierarchical solving method was proposed for the narrow space of the aircraft. The method took the waist as the demarcation point, decomposes the maintenance posture into two parts: upper body and lower body, and used the Elitist Nondominated Sorting Genetic Algorithm Ⅱ (NSGA-Ⅱ) to optimize and solve them separately to obtain the overall maintenance posture. First, the maintenance posture optimization criterion was constructed by comprehensively considering the space limitations and human body structure constraints. Second, the multi-objective optimization models of upper body and lower body postures were constructed based on the maintenance posture optimization criterion and analytical geometry and inverse kinematics principles, and the NSGA-II algorithm was applied to solve them sequentially. Through the cases of the disassembly of the aircraft cockpit Air Data Module ( ADM ) and pushing of the cargo in the cargo hold, it is verified that the method can efficiently generate the virtual maintenance posture for the narrow space of the aircraft, and has good applicability and feasibility.

Key words: maintainability virtual simulation, virtual maintenance posture, narrow aircraft space, posture optimization criteria, multi-objective optimization