Determination of the rotational vibration behaviour of hand-arm systems in the context of user-centered product development

在以用户为中心的产品开发背景下确定手臂系统的旋转振动行为

• 批准号: 408254169
• 负责人: Professor Dr.-Ing. Sven Matthiesen
• 金额: --
• 依托单位: Institut für Produktentwicklung (IPEK)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/408254169?language=en
• 关键词: Determination; rotational; vibration; behaviour; hand

Power tools (handheld devices) and many other technical systems are in direct dynamic interaction with the user. In the development of such systems, it is essential to take these interactions into account, as they affect all system components. A significant part of these interactions consists of passive interactions, i. e. those that originate from the dynamics and are only influenced by the user indirectly. In the simulation-supported development of technical systems, these passive interactions can be implemented using vibration models. These models are based on the mechanical impedance of the user, which can be understood as mechanical resistance to vibration excitation. The impedance is subject to many influencing factors such as arm position, gripping force and contact pressure. The influencing factors for translational excitation directions have been the focus of research for a long time. However, many systems have a main vibration excitation in rotational directions (e. g. cordless screwdrivers or angle grinders). The aim of the proposal is to close this knowledge gap by researching the mechanical impedance of the user in the three rotational space directions. In application studies, the variation of the influencing factors on impedance is first determined in real application scenarios. Exemplary power tools modified for measurement are used. Subsequently, the user's impedances are investigated at the DFG-funded user interaction test bench (UIT) of the IPEK. The UIT is a two-shaker system for the superimposed translational and rotational vibration excitation of the human hand-arm system using an attached measuring handle. For this purpose, the user interaction test bench is equipped with exemplary handle contours in order to generate relevant results.As a result, impedance diagrams of the user's rotational impedance are generated, from which fundamental hand-arm models for simulation-supported product development can be derived in further research.

电动工具（手持设备）和许多其他技术系统与用户直接动态交互。在开发这种系统时，必须考虑到这些相互作用，因为它们影响到系统的所有组成部分。这些相互作用的一个重要组成部分是被动的相互作用，即。e.那些源自动态并且仅受用户间接影响的信息。在技术系统的仿真支持开发中，这些被动交互可以使用振动模型来实现。这些模型基于用户的机械阻抗，其可以被理解为对振动激励的机械阻力。该阻抗受到许多影响因素的影响，例如臂位置、夹持力和接触压力。平移激发方向的影响因素一直是研究的热点。然而，许多系统在旋转方向上具有主要的振动激励（例如，G.无线螺丝刀或角磨机）。该提案的目的是通过研究用户在三个旋转空间方向上的机械阻抗来弥补这一知识差距。在应用研究中，首先在真实的应用场景中确定阻抗影响因素的变化。使用为测量而修改的示例性电动工具。随后，在DFG资助的IPEK用户交互测试台（UIT）上调查用户阻抗。UIT是一个双振动台系统，用于使用附加的测量手柄对人的手臂系统进行叠加的平移和旋转振动激励。为此，用户交互测试台配备了示例性的手柄轮廓，以生成相关结果，从而生成用户旋转阻抗的阻抗图，在进一步的研究中，可以从这些阻抗图中导出用于仿真支持的产品开发的基本手臂模型。