多数接触と大変形に対応した連続体ロボットのリアルタイム準静的FEM高速化
Accelerated Quasi-Static FEM for Real-Time Modeling of Continuum Robots with Multiple Contacts and Large Deformation
連続体ロボットの大変形・多点接触をリアルタイムにモデル化するため、GPU並列計算と高速化ソルバを組み合わせた準静的有限要素法Acc-FEMを提案し、計算効率と精度の両立を実現した。
著者: Hao Chen, Jian Chen, Xinran Liu, Zihui Zhang, Yuanrui Huang, Zhongkai Zhang, Hongbin Liu
分類: cs.RO
原文アブストラクト
Continuum robots offer high flexibility and multiple degrees of freedom, making them ideal for navigating narrow lumens. However, accurately modeling their behavior under large deformations and frequent environmental contacts remains challenging. Current methods for solving the deformation of these robots, such as the Model Order Reduction and Gauss-Seidel (GS) methods, suffer from significant drawbacks. They experience reduced computational speed as the number of contact points increases and struggle to balance speed with model accuracy. To overcome these limitations, we introduce a novel finite element method (FEM) named Acc-FEM. Acc-FEM employs a large deformation quasi-static finite element model and integrates an accelerated solver scheme to handle multi-contact simulations efficiently. Additionally, it utilizes parallel computing with Graphics Processing Units (GPU) for real-time updates of the finite element models and collision detection. Extensive numerical experiments demonstrate that Acc-FEM significantly improves computational efficiency in modeling continuum robots with multiple contacts while achieving satisfactory accuracy, addressing the deficiencies of existing methods.
