虚拟装配手势库设计及人机工效评估优化
收稿日期: 2021-03-31
网络出版日期: 2022-03-03
基金资助
国家自然科学基金资助项目(51975362)
Design of a Virtual Assembly Gesture Library and Optimization of Ergonomics Evaluation
Received date: 2021-03-31
Online published: 2022-03-03
针对虚拟装配环境下,虚拟人上肢仿真设置效率低、人机工效评估不精确的问题,对手部装配动作进行分析,定义手部关节结构、手臂及手部尺寸,建立参数化的装配手势模型并形成手势库.采用模糊算法改进快速上肢评估(RULA)方法,利用梯形函数对关节角度处于临界值时的评估分值进行优化,通过规则库得出最终评估结果.采用劳损指数(SI)评估手部、手腕等肌肉骨骼作业风险,并与模糊RULA评估加权计算综合得分,对虚拟手装配过程进行连续的人机工效评估,捕捉装配作业期间的风险姿势.最后,基于3D Experience平台对上述方法进行集成,并通过手机通讯元件的装配作业进行应用验证.
郭加伟, 许志杰, 何其昌 . 虚拟装配手势库设计及人机工效评估优化[J]. 上海交通大学学报, 2022 , 56(2) : 127 -133 . DOI: 10.16183/j.cnki.jsjtu.2021.095
In view of the low efficient of virtual human upper limb simulation in the virtual assembly environment and the inaccurate evaluation of ergonomics, this paper analyzes hand assembly action, defines hand joint structure, arm and hand size, establishes a parametric assembly gesture model, and forms a gesture library. The fuzzy algorithm is used to improve the rapid upper limb assessment (RULA) method. The trapezoidal function is used to optimize the evaluation score when the joint angle is at the critical value. The final evaluation result is obtained through the rule base. Strain index(SI) is used to evaluate the risk of musculoskeletal operations such as hands and wrists, and the comprehensive score is weighted with fuzzy RULA evaluation. The ergonomics of the virtual hand assembly process is continuously evaluated to capture the risk posture in the assembly operation. Finally, the above methods are integrated based on the 3D Experience platform and verified by the assembly of mobile communication components.
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