Bioinspired actuation of the eyeballs of an android robotic face: concept and preliminary investigations

执行机构 滑轮 人工肌肉 计算机科学 电活性聚合物 线性执行器 控制理论(社会学) 机械工程 控制工程 工程类 人工智能 控制(管理)
作者
Federico Carpi,Danilo Emilio De Rossi
出处
期刊:Bioinspiration & Biomimetics [IOP Publishing]
卷期号:2 (2): S50-S63 被引量:26
标识
DOI:10.1088/1748-3182/2/2/s06
摘要

This paper describes the concept and preliminary investigations related to the development of simple bioinspired actuation mechanisms for the eyeballs of an android robotic face. Two design solutions for a one-degree-of-freedom mechanism are proposed and analytically studied according to linear models. Both of them are based on new contractile actuators made of electroactive polymers, employed as pseudomuscular devices. The actuators consist of dielectric elastomers and are capable of electrically driven linear contractions. The arrangement and the functionality of the actuators were conceived to mimic those of rectus-type human ocular muscles. Both the presented solutions rely on a couple of agonist–antagonist actuators, in order to enable bidirectional rotations of the eyeball around an axis. The two configurations basically differ in the presence/absence of pulleys, guiding tendon-like wires which connect the actuators to the eyeball. The influence on the system performances of both rest length and elastic modulus of the actuators was studied for both configurations. Geometrical constraints allow the configuration with pulleys to perform more than the other, despite a potential intrinsic superior efficacy of the latter. The paper describes also the assembly of a simple prototype version of the system and presents the results of preliminary tests. These permitted us to assess the feasibility of the proposed concept and suggested possible improvements.

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