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arXiv 2201.00583eess.SYcs.ROcs.SY
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统一框架下SEA转矩控制器的评价和比较

Evaluation and comparison of SEA torque controllers in a unified framework

University of Twente(特文特大学);TU Delft(代尔夫特理工大学)

Wolfgang Rampeltshammer, Arvid Keemink, Menno Sytsma, Edwin van Asseldonk, Herman van der Kooij

摘要:

系列弹性执行器(SEA)具有固有的柔顺性,可为与包括人类在内的各种环境交互的机器人提供安全的扭矩源。这些应用对SEA转矩控制器的转矩响应以及与环境的交互行为都有很高的要求。为了区分最先进的转矩控制器,这项工作是引入一个统一的理论和实验框架,比较控制器的基础上,他们的转矩传递行为,他们的表观阻抗行为,特别是表观阻抗的无源性,即他们的相互作用的稳定性,以及他们的灵敏度传感器噪声。我们比较经典的SEA控制方法,如级联PID控制器和全状态反馈控制器与先进的控制器,使用干扰观测器,加速度反馈和自适应规则。仿真和实验表明,稳定的相互作用,高带宽和低噪声水平之间的权衡。基于这些权衡,可以基于与相应环境的期望交互来设计和调整应用专用控制器。

英文摘要:

Series elastic actuators (SEA) with their inherent compliance offer a safe torque source for robots that are interacting with various environments, including humans. These applications have high requirements for the SEA torque controllers, both in the torque response as well as interaction behavior with its the environment. To differentiate state of the art torque controllers, this work is introducing a unifying theoretical and experimental framework that compares controllers based on their torque transfer behavior, their apparent impedance behavior, and especially the passivity of the apparent impedance, i.e. their interaction stability, as well as their sensitivity to sensor noise. We compare classical SEA control approaches such as cascaded PID controllers and full state feedback controllers with advanced controllers using disturbance observers, acceleration feedback and adaptation rules. Simulations and experiments demonstrate the trade-off between stable interactions, high bandwidths and low noise levels. Based on these tradeoffs, an application specific controller can be designed and tuned, based on desired interaction with the respective environment.

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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