Optimal design of a micro-positioning Scott-Russell mechanism by Taguchi method

Ha, Jih-Lian; Kung, Ying‐Shieh; Hu, Sheng-Chuen; Fung, Rong‐Fong

doi:10.1016/j.sna.2005.06.025

Cited by 58 publications

(29 citation statements)

References 7 publications

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“…(27a)-(27c), the theoretical responses of the flexure-based Scott-Russell mechanism to the step, slope and cycloidal command signals are obtained and shown in Figs. [15][16][17]. Due to small damping ratio, there is severe oscillation in the step response of the Scott-Russell mechanism, where the overshoot is approximately up to 93% of the destination, and the settling time of the step response is estimated as 0.35 s. The flexure-based Scott-Russell mechanism with the mentioned performance cannot be used for actual applications, due to the poor positioning accuracy and slow response speed.…”

Section: Article In Pressmentioning

confidence: 99%

Development and dynamic modelling of a flexure-based Scott–Russell mechanism for nano-manipulation

Tian

Shirinzadeh

Zhang

et al. 2009

Mechanical Systems and Signal Processing

188

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Section: Article In Pressmentioning

confidence: 99%

Development and dynamic modelling of a flexure-based Scott–Russell mechanism for nano-manipulation

Tian

Shirinzadeh

Zhang

et al. 2009

Mechanical Systems and Signal Processing

188

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“…Hence, if the gripper tips come to contact with the target object which has a curved shape, the reaction force will push out the object. Scott Russell (SR) mechanism has been used to design micromanipulation systems previously (Hwang et al, 2011;Chang and Du, 1998;Ha et al, 2006). SR mechanism has a simple structure and it can provide rectilinear output motion.…”

Section: Introductionmentioning

confidence: 99%

Mechanical design, analysis and testing of a large-range compliant microgripper

Liu

2016

Mech. Sci.

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Abstract. This paper presents the mechanical design, analysis, fabrication, and testing procedures of a new large-range microgripper which is based on a flexible hinge structure. The uniqueness of the gripper is that the gripper arms not only provide large gripping range but also deliver approximately rectilinear movement as the displacement in nonworking direction is extremely small. The large gripping range is enabled by a mechanism design based on dual-stage flexure amplifier to magnify the stroke of piezoelectric actuator. The first-stage amplifier is a modified version of the Scott Russell (SR) mechanism and the second-stage amplifier contains a parallel mechanism. The displacement amplification ratio of the modified SR mechanism in the gripper has been enlarged to 3.56 times of the conventional design. Analytical static models of the gripper mechanism are developed and validated through finite-element analysis (FEA) simulation. Results show that the gripping range is over 720 µm with a resonant frequency of 70.7 Hz and negligible displacement in nonworking direction. The total amplification ratio of the input displacement is 16.13. Moreover, a prototype of the gripper is developed by using aluminium 7075 for experimental testing. Experimental results validate the analytical model and FEA simulation results. The proposed microgripper can be employed in various microassembly applications such as pick-and-place of optical fibre.

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“…As an alternative, mechanical displacement amplifiers are popular devices to amplify the stroke of PSA in order to achieve large output displacements (Yong et al 2009). A literature review indicates that the commonly used displacement amplifiers are based on three types including lever mechanism (Yong et al 2009;Choi et al 2007), Scott-Russell mechanism (Ha et al 2006;Tian et al 2009) and bridge-type mechanism (Xu and Li 2011;Lobontiu and Garcia 2003). By comparison, the bridge-type amplifier possesses larger displacement amplification ratio but smaller output stiffness, while the Scott-Russell mechanism has a smaller displacement amplification ratio but larger output stiffness.…”

Section: Introductionmentioning

confidence: 99%