Design, modeling and analysis of large-stroke compliant constant torque mechanisms

IF 4.5 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Rui Chen , Lifu Liu , Wei Wang , Yifan Liu , Ke Wu , Luna Zhou , Zean Yuan , Gang Zheng
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引用次数: 0

Abstract

Precision operations, such as micro-injection and micro-assembly tasks, require accurate and constant torque output. Compliant constant torque mechanisms (CCTMs) can be considered as a potential alternative due to the characteristic of accurate and constant torque output without the need for complex control algorithms and structures. Therefore, it is essential to propose a general, designer-friendly, and efficient design methodology for the design of CCTMs. In this paper, we propose a methodology for designing compliant constant torque mechanisms based on a co-design process between Cartesian coordinate system and Frenet frame. We use geometrically exact beam theory to model the static deflection of the built-in flexible beams so as to analyze the overall mechanism. We transform the design of this mechanism into a typical constrained optimization problem, and solve it via highly efficient numerical methods to achieve the desired design objectives given the user-defined constraints and satisfy some specific engineering requirements. Our optimized design is thoroughly evaluated and validated through finite element method and experimental testing, demonstrating a significantly improved performance compared to existing designs.

大冲程顺应式恒扭矩机构的设计、建模和分析
微注塑和微装配等精密操作需要精确恒定的扭矩输出。顺应式恒定扭矩机构(CCTM)无需复杂的控制算法和结构,即可输出精确恒定的扭矩,因此可被视为一种潜在的替代方案。因此,有必要为 CCTM 的设计提出一种通用的、便于设计者使用的高效设计方法。在本文中,我们提出了一种基于笛卡尔坐标系和 Frenet 框架协同设计过程的设计顺应式恒转矩机构的方法。我们使用几何精确梁理论来模拟内置柔性梁的静态挠度,从而分析整体机构。我们将该机构的设计转化为一个典型的约束优化问题,并通过高效的数值方法对其进行求解,从而在用户定义的约束条件下实现预期的设计目标,并满足一些特定的工程要求。我们通过有限元法和实验测试对优化设计进行了全面评估和验证,结果表明,与现有设计相比,我们的设计性能有了显著提高。
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来源期刊
Mechanism and Machine Theory
Mechanism and Machine Theory 工程技术-工程:机械
CiteScore
9.90
自引率
23.10%
发文量
450
审稿时长
20 days
期刊介绍: Mechanism and Machine Theory provides a medium of communication between engineers and scientists engaged in research and development within the fields of knowledge embraced by IFToMM, the International Federation for the Promotion of Mechanism and Machine Science, therefore affiliated with IFToMM as its official research journal. The main topics are: Design Theory and Methodology; Haptics and Human-Machine-Interfaces; Robotics, Mechatronics and Micro-Machines; Mechanisms, Mechanical Transmissions and Machines; Kinematics, Dynamics, and Control of Mechanical Systems; Applications to Bioengineering and Molecular Chemistry
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