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arXiv 2409.20344cs.ROcs.SYeess.SY
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介电弹性体致动器驱动的软体并联机器人设计、制造与逆动力学建模

Design, manufacturing, and inverse dynamic modeling of soft parallel robots actuated by dielectric elastomer actuators

Jung-Che Chang, Xi Wang, Dragos Axinte, Xin Dong

AI总结:

本文提出一种介电弹性体致动器驱动的软体Delta并联机器人,通过角行程放大机构、三维拼插轻量化结构和高稳定性导电涂层电极改善性能,并基于扩展Bergstrom-Boyce模型建立逆动力学模型,实现输出力预测与轨迹跟踪。

摘要:

软体并联机器人因其操作安全性和较低商业成本,在精细操作与安全人机交互方面展现出广阔前景。然而,由于产品质量提升不足以及多致动器协同动力学建模困难,推广电活性聚合物(EAPs)仍面临挑战。本文介绍了一种由介电弹性体致动器(DEAs)驱动的并联运动学Delta机器人的设计、制造、建模与控制。通过角行程放大机构重新权衡致动力与行程之间的折中关系,并利用三维拼插条状结构减轻机器人框架重量。通过激光扫描介电弹性体薄膜,再用颗粒与光敏树脂混合而成的导电涂料夹持导电颗粒基电极,实现了一种在硅基薄膜上构建高稳定性导电涂层的通用方法。与广泛使用的碳脂相比,所制备电极在静置测试前后的动态行为表现出更高一致性。最后,为预测机器人末端执行器的输出力与逆向运动,我们将扩展的Bergstrom-Boyce模型引入介电薄膜的本构行为,构建了逆动力学模型。实验结果表明,末端执行器保持静止时机器人输出力预测的RSME为12.4%,轨迹跟踪良好,RSME小于2.5%。

英文摘要:

Soft parallel robots with their manipulation safety and low commercial cost show a promising future for delicate operations and safe human-robot interactions. However, promoting the use of electroactive polymers (EAPs) is still challenging due to the under-improving quality of the product and the dynamic modelling of the collaborations between multiple actuators. This article presents the design, fabrication, modelling and control of a parallel kinematics Delta robot actuated by dielectric elastomer actuators (DEAs). The trade-off between the actuation force and stroke is retaken by an angular stroke amplification mechanism, and the weight of the robot frame is reduced by utilizing 3D puzzling strip structures. A generic way of constructing a high-stability conductive paint on a silicon-based film has been achieved by laser scanning the DE-film and then sandwiching a conductive particle-based electrode with a paint which is mixed by the particles and photosensitive resin. Compared to the wildly used carbon grease, the fabricated electrode shows a higher consistency in its dynamic behaviour before and after the on-stand test. Finally, to predict the output force and inverse motion of the robot end effector, we constructed the inverse dynamic model by introducing an expanded Bergstrom-Boyce model to the constitutive behavior of the dielectric film. The experimental results show a prediction of robot output force with RSME of 12.4% when the end effector remains stationary, and a well-followed trajectory with less than RSME 2.5%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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