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Shape reconstruction of parallelogram flaw

ZHENG Gangfeng, WU Bin, HE Cunfu

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1, Pages 17-22 doi: 10.1007/s11465-008-0015-4

Abstract: For a parallelogram void in a long Al rod, its shape factor can be obtained.For the parallelogram void, a theoretical calculating identification is performed.

Keywords： approximation scatterer scattering problem information inverse

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A modular cable-driven humanoid arm with anti-parallelogram mechanisms and Bowden cables

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0722-2

Abstract: This paper proposes a novel modular cable-driven humanoid arm with anti-parallelogram mechanisms (APMs

Keywords： modular robotic arm anti-parallelogram mechanism Bowden cable humanoid arm lightweight joint design

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Conceptual design of compliant translational joints for high-precision applications

Guangbo HAO,Haiyang LI,Xiuyun HE,Xianwen KONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4, Pages 331-343 doi: 10.1007/s11465-014-0321-y

Abstract: This paper deals with the conceptual design of CTJs via three approaches: parallelogram based method,New CTJs are proposed using three approaches, including an asymmetric double parallelogram mechanismwith slaving mechanism, several compact and symmetric double parallelogram mechanisms with slaving mechanisms

Keywords： compliant mechanisms translational joints conceptual design parallelogram straight-line motion combination

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Mechatronic design of a novel linear compliant positioning stage with large travel range and high out-of-plane payload capacity

Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2, Pages 265-278 doi: 10.1007/s11465-017-0453-y

Abstract:

Most of the XY positioning stages proposed in previous studies are mainly designed by considering only a single performance indicator of the stage. As a result, the other performance indicators are relatively weak. In this study, a 2-degree-of-freedom linear compliant positioning stage (LCPS) is developed by mechatronic design to balance the interacting performance indicators and realize the desired positioning stage. The key parameters and the coupling of the structure and actuators are completely considered in the design. The LCPS consists of four voice coil motors (VCMs), which are conformally designed for compactness, and six spatial leaf spring parallelograms. These parallelograms are serially connected for a large travel range and a high out-of-plane payload capacity. The mechatronic model is established by matrix structural analysis for structural modeling and by Kirchhoff’s law for the VCMs. The sensitivities of the key parameters are analyzed, and the design parameters are subsequently determined. The analytical model of the stage is confirmed by experiments. The stage has a travel range of 4.4 mm× 7.0 mm and a 0.16% area ratio of workspace to the outer dimension of the stage. The values of these performance indicators are greater than those of any existing stage reported in the literature. The closed-loop bandwidth is 9.5 Hz in both working directions. The stage can track a circular trajectory with a radius of 1.5 mm, with 40 mm error and a resolution of lower than 3 mm. The results of payload tests indicate that the stage has at least 20 kg out-of-plane payload capacity.

Keywords： design linear compliant positioning stage large travel range high out-of-plane payload capacity spatial parallelogram