Design, analysis and validation of the bridge-type displacement amplification mechanism with circular-axis leaf-type flexure hinges for micro-grasping system

Chen, Weilin; Lu, Qinghua; Kong, Chuiwang; Zhang, Yunzhi; Zhang, Qinghua

doi:10.1007/s00542-018-4064-2

Cited by 12 publications

(3 citation statements)

References 24 publications

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“…For example, Dong et al [28] utilised various flexure hinges in a lumped bridge-leverage CDAM to reduce displacement loss and improve load capacity. In addition, Chen et al [29] designed a bridge-type CDAM with circular axis leaf-type flexure hinges by considering the axis curvature of the flexure hinge and the dominant internal force; consequently, their designed bridge-type CDAM had an increased output displacement compared with the traditional bridge-type CDAM with the largest stroke.…”

Section: Introductionmentioning

confidence: 99%

A novel bridge-type compliant displacement amplification mechanism under compound loads based on the topology optimisation of flexure hinge and its application in micro-force sensing

Chen,

Kang,

et al. 2023

Smart Mater. Struct.

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The design and modelling of bridge-type compliant displacement amplification mechanisms (CDAMs) are key components in precision engineering. In this study, a bridge-type CDAM under compound loads with an optimum flexure hinge configuration is designed, analysed, and tested. For the case when the flexure hinge configuration is unknown, the internal force distribution for a bridge-type CDAM under compound loads is analysed, and the topology of the flexure hinge is optimised. By applying different volume constraints, the optimised flexure hinge configurations are all V-shaped. Subsequently, a static model of the V-shaped flexure hinge is established. For a bridge-type CDAM with V-shaped flexure hinges, the compliance matrix of the flexure hinge is combined with the relationship among the local compliance matrices in a serial mechanism; consequently, the analytical relationship between the output displacement, output force, and input force is derived. The CDAM is parametrically optimised to further improve the output performance. Simulations and experiments verify the topology optimisation result, static model, and parametric optimisation result. Finally, the CDAM and its static model are applied to the tensile manipulation and micro-force sensing in a microfiber tensile test.

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Section: Introductionmentioning

confidence: 99%

A novel bridge-type compliant displacement amplification mechanism under compound loads based on the topology optimisation of flexure hinge and its application in micro-force sensing

Chen,

Kang,

et al. 2023

Smart Mater. Struct.

Self Cite

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show abstract

“…The main contribution of the work lies in the design of a novel piezoelectric harvesting device for scavenging energy from both vibration and force excitations. It is notable that the bridge type of amplifier has been employed as a displacement amplifier [20] and a force amplifier [19] before. However, no attempt has been made towards the use of the bridge-type amplifier as an energy harvester with both vibration and force excitations in the literature.…”

Section: Introductionmentioning

confidence: 99%

Design of a New Piezoelectric Energy Harvesting Handrail With Vibration and Force Excitations

Tam

2019

IEEE Access

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This paper presents the design, fabrication and testing of a new type of energy harvesting handrail. One uniqueness of the handrail energy harvester is that it has two working modes for collecting the energy excited by both vibration and pulling force during the operation. In order to enable good stability and anti-jamming ability for the energy harvester, a compound bridge-type compliant force amplifier is adopted and its parameters are optimized based on multi-objective genetic algorithm with finite-element analysis simulation. Analytical dynamic model is established for the piezoelectric device and the output power is calculated. A prototype harvester is fabricated for experimental investigation. Experimental results verify the effectiveness of the derived analytical model. Moreover, results show that the maximum power output is up to 150 µW under vibration excitation and 15 mW under random pulling force input. A series of the designed energy harvesters can be used to scavenge the energy generated by passengers in a bus or subway under different motion states.

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“…It should be pointed out that the direct output displacement of a piezoelectric actuator is about one thousandth of its own length, which usually can not meet the requirements of large working range in most cases. Amplifying mechanism is typically employed to amplify and transmit displacement, such as lever mechanism (Xing, 2015;Tang and Li, 2015;Tang et al, 2018), Scott-Russell mechanism (Tian et al, 2009), rhombic mechanism (Ling et al, 2018), bridge-type mechanism (Li and Xu, 2011;Chen et al, 2018;Clark et al, 2018). Among various amplifying mecha-nisms, bridge-type mechanism was widely investigated due to its characteristics of high amplification ratio, compact structure and easy processing.…”

Section: Introductionmentioning

confidence: 99%

Displacement amplification ratio modeling of bridge-type nano-positioners with input displacement loss

Jin-yin

Yan

2019

Mech. Sci.

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Abstract. This paper presents an improved modeling method for bridge-type mechanism by taking the input displacement loss into consideration, and establishes an amplification ratio model of bridge-type mechanism according to compliance matrix method and elastic beam theory. Moreover, the amplification ratio of the designed bridge-type nano-positioner is obtained by taking the guiding mechanism as the external load of bridge-type mechanism. Comparing with existing methods, the proposed model is more accurate, which is further verified by finite element analysis(FEA) and experimental test. The consistency of the results obtained from theoretical model, FEA and experimental testing indicates that the proposed model can accurately predict the amplification characteristics of nano-positioners, which helps the analysis and design of bridge-type nano-positioners in practical applications.

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Design, analysis and validation of the bridge-type displacement amplification mechanism with circular-axis leaf-type flexure hinges for micro-grasping system

Cited by 12 publications

References 24 publications

A novel bridge-type compliant displacement amplification mechanism under compound loads based on the topology optimisation of flexure hinge and its application in micro-force sensing

A novel bridge-type compliant displacement amplification mechanism under compound loads based on the topology optimisation of flexure hinge and its application in micro-force sensing

Design of a New Piezoelectric Energy Harvesting Handrail With Vibration and Force Excitations

Displacement amplification ratio modeling of bridge-type nano-positioners with input displacement loss

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