Abstract:

In order to improve the authenticity of virtual human's motion in the ergonomic assessment, this paper established a motion model of the upper limbs with 7 degrees of freedom. Based on this model and the true angle range of the human joints' activities, all the reachable points of the limb endpoint were calculated, and an optimization algorithm was presented to extract the useful points from the mass of reachable points. By using the reverse software, the optimized reachable points were transformed into three-dimensional reachable space of the upper limbs. Finally, the obtained workspace model was bound to the virtual human and applied in the static or dynamic assessment. It shows that the proposed method can facilitate reachable assessment of upper limbs and rational design of operating devices.

Key words: virtual human, upper limbs, work space, reconstruction

摘要：

为提高虚拟人在人机工程可及性评估中的真实性,建立了七自由度人体上肢参数化运动模型,基于该模型可计算出上肢末端的所有空间可达点。为了消除可达点间存在大量重复、冗余的问题,进一步提出了点云边界优化处理的具体实施算法,将其与逆向软件结合,实现了点云边界的曲面重构。最后,将所得的三维可及空间模型绑定于虚拟人体,通过驱动虚拟人进行静态或动态可及性评估,为各类操作器件的合理布局提供修改依据。

关键词: 虚拟人, 上肢, 工作空间, 重建