基于接触有限元模型的虚拟手指力建模研究  

Virtual Finger Force Modeling Based on Nonlinear Contact Finite Element Method

作　　者：丁国富[1] 王金诺[1] 

机构地区：[1]西南交通大学机械工程研究所,610031

出　　处：《计算机仿真》2000年第4期21-23,共3页Computer Simulation

摘　　要：触觉反馈是虚拟现实应用中使人获得沉浸感的重要方式。随着现实设备和显示技术的日趋成熟，触觉和力反馈的研究已成为研究的焦点之一，如何度量虚拟手在接触物体时反馈的力的大小，将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，给出了虚拟手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，并采用ＡＮＳＹＳ对基于非均匀有理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。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.

关 键 词：虚拟现实 虚拟环境 力反馈 接触有限元 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]