论文标题
优化柔软抓手的平面外刚度
Optimizing out-of-plane stiffness for soft grippers
论文作者
论文摘要
在本文中，我们提出了一个数据驱动的框架，以优化软抓地力的平面外刚度，以实现像难以扭动且易于弯曲的机械性能。在软气动弯曲执行器（SPBA）的设计中证明了该方法的有效性。首先，定义了一个新的目标函数，以定量评估平面外刚度以及弯曲性能。然后，对SPBA设计的参数模型进行灵敏度分析，以确定有限元分析（FEA）的优化设计参数。为了启用数值优化的计算，采用数据驱动的方法来学习成本函数，该成本函数直接代表了平面外刚度作为设计变量的可区分函数。一种基于梯度的方法用于最大化SPBA的平面外刚度，同时确保特定的弯曲性能。我们方法的有效性已在3D打印的握手进行的物理实验中得到了证明。
In this paper, we presented a data-driven framework to optimize the out-of-plane stiffness for soft grippers to achieve mechanical properties as hard-to-twist and easy-to-bend. The effectiveness of this method is demonstrated in the design of a soft pneumatic bending actuator (SPBA). First, a new objective function is defined to quantitatively evaluate the out-of-plane stiffness as well as the bending performance. Then, sensitivity analysis is conducted on the parametric model of an SPBA design to determine the optimized design parameters with the help of Finite Element Analysis (FEA). To enable the computation of numerical optimization, a data-driven approach is employed to learn a cost function that directly represents the out-of-plane stiffness as a differentiable function of the design variables. A gradient-based method is used to maximize the out-of-plane stiffness of the SPBA while ensuring specific bending performance. The effectiveness of our method has been demonstrated in physical experiments taken on 3D-printed grippers.
