基于接触有限元模型的虚拟手指力建模研究

触觉反馈是虚拟现实应用中使人获得沉浸感的重要方式。随 显示技术的日趋成熟，触觉和力反馈的研究的焦点之一，如何度量虚拟手在接触物体时反馈的力的大小 是力反馈中的首要一步，对此，该文在研究了力反馈类型的基础上，给和指与虚拟物体间的接触数学模型，提出了基于接触有限元的接触数学模型，并有杉ＡＮＳＹＳ对霏 均匀有理Ｂ样条的手指表面和虚拟按钮间的接触变形和力分布情况进行了计算，得出了力反馈所需要的接触力大小。

Virtual Finger Force Modeling Based on Nonlinear Contact Finite Element Method

In recent development and research of Virtual Reality applications, attention has been focused on methods to provide force feedback to the human operator. Haptic plays an important role on lifelike interaction with the computer generated environment.Whether the force interaction between virtual hand and virtual objects is modeled accurate or not, is a rather important factor for immersive qualities of virtual environments. Here we present a novel method which is on the basis of nonlinear contact finite element theory, to model the force interaction between virtual hand and virtual objects. This work, first, studies the classification of force feedback and corresponding mathematics model, consequently,models NURBS-based geometric fingertip and force between virtual hand and virtual Objects, finally, simulates this situation with ANSYS.