Theoretical modeling of attenuated displacement amplification for multistage compliant mechanism and its application

Ling, Mingxiang; Cao, Junyi; Jiang, Zhou; Lin, Jing

doi:10.1016/j.sna.2016.08.011

Cited by 62 publications

(17 citation statements)

References 19 publications

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“…Zhao et al [29] designed a cymbal for harvesting energy from asphalt pavements. Ling et al [30] proposed an attenuated displacement amplification of multistage compliant mechanisms. Cao et al [31] designed an analytical model to describe the static displacement and force interactions between generic serial-parallel compliant mechanisms and piezo-stacks.…”

Section: Introductionmentioning

confidence: 99%

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

Duan¹,

Cao

et al. 2021

Appl. Math. Mech.-Engl. Ed.

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Vibration energy harvesters (VEHs) can transform ambient vibration energy to electricity and have been widely investigated as promising self-powered devices for wireless sensor networks, wearable sensors, and applications of a micro-electro-mechanical system (MEMS). However, the ambient vibration is always too weak to hinder the high energy conversion efficiency. In this paper, the integrated frame composed of piezoelectric beams and mechanical amplifiers is proposed to improve the energy conversion efficiency of a VEH. First, the initial structures of a piezoelectric frame (PF) and an amplification frame (AF) are designed. The dynamic model is then established to analyze the influence of key structural parameters on the mechanical amplification factor. Finite element simulation is conducted to study the energy harvesting performance, where the stiffness characteristics and power output in the cases of series and parallel load resistance are discussed in detail. Furthermore, piezoelectric beams with variable cross-sections are introduced to optimize and improve the energy harvesting efficiency. Advantages of the PF with the AF are illustrated by comparison with conventional piezoelectric cantilever beams. The results show that the proposed integrated VEH has a good mechanical amplification capability and is more suitable for low-frequency vibration conditions.

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Section: Introductionmentioning

confidence: 99%

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

Duan¹,

Cao

et al. 2021

Appl. Math. Mech.-Engl. Ed.

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show abstract

“…During the last three decades, a variety of techniques and methodologies have been developed for kinetostatic and dynamic modeling of compliant mechanisms, such as the pseudo-rigid-body model (PRBM) [14], Castigliano's second theorem [15], compliance matrix method [16], elastic beam theory [17], two-port dynamic stiffness model [18], Ryu's method [19], and beam constraint model [20]. These methodologies have enabled significant advances in designing compliant mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, large-deflection analysis and complex serial-parallel configurations often encountered in compliant mechanisms lead to intractable modeling procedures. Although many solutions are now available for kinetostatic and dynamic modeling of compliant mechanisms [14][15][16][17][18][19][20], there has been less effort on clarifying and comparing the conceptual ideas, advantages, disadvantages, discrepancies, and applicable scopes among these modeling methods. It would be difficult for designers with little experience in the field of compliant mechanisms to find a starting point from where they can be guided toward the modeling issues [21] and to identify which method is most suitable for their specific applications.…”

Section: Introductionmentioning

confidence: 99%

Kinetostatic and Dynamic Modeling of Flexure-Based Compliant Mechanisms: A Survey

Ling

Howell

Cao

et al. 2020

Applied Mechanics Reviews

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165

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Flexure-based compliant mechanisms are becoming increasingly promising in precision engineering, robotics, and other applications due to the excellent advantages of no friction, no backlash, no wear, and minimal requirement of assembly. Because compliant mechanisms have inherent coupling of kinematic-mechanical behaviors with large deflections and/or complex serial-parallel configurations, the kinetostatic and dynamic analyses are challenging in comparison to their rigid-body counterparts. To address these challenges, a variety of techniques have been reported in a growing stream of publications. This paper surveys and compares the conceptual ideas, key advances, and applicable scopes, and open problems of the state-of-the-art kinetostatic and dynamic modeling methods for compliant mechanisms in terms of small and large deflections. Future challenges are discussed and new opportunities for extended study are highlighted as well. The presented review provides a guide on how to select suitable modeling approaches for those engaged in the field of compliant mechanisms.

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“…Wei used a hybrid flexible hinge to design a bow-and-pin magnification mechanism with multi-stage magnification [24]. Ling et al designed a two-stage bow-type amplifier with a large range and high frequency and established a displacement amplification ratio formula by defining the impedance factor [25,26]. Zhang et al designed a bow-type amplifier and established its simplified model [27].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Study of Double-Row Bow-Type Micro-Displacement Amplifier for Direct-Drive Servo Valves

et al. 2020

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Giant magnetostrictive actuators (GMA) are widely used in the field of servo valves, but the displacement of GMA is limited, which renders meeting the requirements of large flow direct-drive electro-hydraulic servo valves (DDV) difficult. In order to solve these problems, this study proposes a double-row bow-type micro-displacement amplifier (DBMA), used to increase output displacement of GMA to meet the requirements. This study, by static analysis, analyzes the force of a flexure hinge based on theoretical mechanics and material mechanics, derives the stiffness matrix of the flexure hinge by the influence coefficient method, establishes the pseudo-rigid model, and derives the amplification ratio of a DBMA. Also, by kinetic analysis, using Castigliano’s second theorem, a formula of equivalent stiffness and natural frequency of DBMA were derived and the influences of different parameters on them were analyzed, respectively. After that, we analyzed the amplifier using finite element method (FEM) simulation software and verified the model by manufacturing a prototype and building a test system. Theoretical calculations and experimental results showed that the amplification ratio of the DBMA fluctuated between 15.43 and 16.25. The natural frequency was about 305 Hz to 314 Hz and the response bandwidth was up to 300 Hz. The error among the theoretical, simulated, and experimental values was within 8%, supporting the accuracy of the model.

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Theoretical modeling of attenuated displacement amplification for multistage compliant mechanism and its application

Cited by 62 publications

References 19 publications

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

Kinetostatic and Dynamic Modeling of Flexure-Based Compliant Mechanisms: A Survey

Modeling and Experimental Study of Double-Row Bow-Type Micro-Displacement Amplifier for Direct-Drive Servo Valves

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