基于改进弹簧振子模型的实时肌腱模拟  

Real-time Tendon Simulation Based on Improved Mass-spring Model

作　　者：李祐国[1] 熊岳山[1] 谭珂[2] 郭光友[2] 

机构地区：[1]国防科学技术大学计算机学院,长沙410073 [2]中国人民解放军总医院技术教育中心,北京100853

出　　处：《计算机工程》2009年第15期253-255,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60773022);国家"863"计划基金资助项目(2007AA01Z313);北京市自然科学基金资助项目(4062034)

摘　　要：在膝关节前交叉韧带重建仿真系统中,为了进行人体肌腱实时模拟,提出一种基于改进弹簧振子模型的实时肌腱模拟方法,通过定义非线性弹簧,降低线性弹簧振子模型"超弹性"现象的发生概率,从而增强肌腱应力的仿真效果,利用添加临时性约束弹簧的方法进行碰撞处理,同时用隐式欧拉方法求解模型,提高肌腱模拟的整体性和实时性。实验结果表明,该方法符合系统对实时性和真实感的要求。In order to conduct real-time simulation for human tendon in rebuilt system of Anterior Cruciate Ligament（ACL）, a real-time tendon simulation method based on improved mass-spring model is proposed. By defining non-linear spring, the probability of ＂super-elasticity＂ in linear spring model is cut down, which enhances the simulation effect of tendon force. The approach of adding temporary restriction springs is used to deal with collision, and the implicit backward Euler method is also used to solve the model. The real-time performance and integrity of simulation is promoted. Experimental results show this method meets the system requirement of real-time and realistic sense.

关 键 词：手术仿真 前交叉韧带 肌腱 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]