Performance of a shock isolator inspired by skeletal muscles

Gatti, Gianluca; Ledezma-Ramírez, Diego Francisco; Brennan, M.J.

doi:10.1016/j.ijmecsci.2022.108066

Cited by 44 publications

(2 citation statements)

References 48 publications

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“…Passive isolators include springs, hyperelastic materials, nonlinear structures, and parallel mechanisms with positive and negative stiffnesses [9][10][11][12]. In addition, studies have been inspired by biological systems to design passive vibration isolators (using linear or nonlinear structures) that can achieve better isolation performances [13][14][15][16]. As a traditional isolation method, passive isolation has the advantages of good high-frequency isolation performance and no energy requirements, which are particularly important in aerospace applications [17].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Bio-Inspired, Reconfigurable, Piezo-Driven Vibration Isolator for Spacecraft

Zhang,

Wang,

et al. 2024

Biomimetics

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The positioning accuracy of spacecraft in orbit is easily affected by low-frequency micro-vibrations of the environment and internal disturbances caused by the payload. Inspired by the neck structure of birds, this study devised a piezo-driven active vibration isolation unit with high stiffness. First, a dynamic model and two-sensor feedback control method for the isolation unit were developed, and the isolation mechanism and anti-disturbance characteristics were analyzed. Further, the stability of the closed-loop was verified. Simulation models of serial and parallel systems based on the proposed vibration isolation unit were implemented to demonstrate its feasibility. The results indicate that the proposed isolation units can provide excellent low-frequency vibration isolation performance and inertial stability and that they can effectively resist the internal disturbance of the payload. Moreover, its performance can be further improved via serial or parallel reconfiguration that facilitates its adaptation to the varied isolation requirements of spacecraft.

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Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Bio-Inspired, Reconfigurable, Piezo-Driven Vibration Isolator for Spacecraft

Zhang,

Wang,

et al. 2024

Biomimetics

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“…Bio-inspired structures with good stability have been studied to explore their superior nonlinearities and possible applications in the field of vibration control [48,49]. Inspired by the skeletons of animals, Jing et al [50][51][52][53] designed X-shaped or limb-like structures with beneficial nonlinear stiffness/damping/inertial properties.…”

Section: Introductionmentioning

confidence: 99%

A novel quasi-zero-stiffness isolation platform via tunable positive and negative stiffness compensation mechanism

Chai

Bian

2023

Preprint

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Various quasi-zero stiffness (QZS) systems with high-static and low-dynamic stiffness (HSLDS) have been applied extensively to attenuate low-frequency vibrations. However, in the majority of cases, the negative stiffness unit exhibits nonlinear stiffness behaviors, and the method of realizing QZS is limited to compensate the nonlinear negative stiffness through linear springs. Hence, a novel linkage anti-vibration structure (LAVS) via linear positive and negative stiffness compensation mechanism is proposed and studied for exploring its advantages in low-frequency vibration isolation. The LAVS is composed of a symmetric polygonal structure (SPS) and a vertical spring. The static stiffness behavior is first investigated, revealing the inherent positive and negative stiffness compensation mechanism of linear springs to the SPS. By tuning structural parameters, the linear spring can completely compensate the linear negative stiffness of the SPS to achieve enhanced QZS over a larger stroke. Numerical simulation is carried out to verify the theoretical result and demonstrates the effectiveness of the presented stiffness compensation mechanism. Based on the Lagrange principle, a dynamic equation is established and then solved via the multiple scales method to obtain the displacement transmissibility. The effects of key parameters such as the rod lengths, equilibrium points and damping factors on the amplitude-frequency characteristics and vibration transmissibility are analyzed. Compared with existing typical QZS and X-shaped isolation systems, the presented LAVS exhibits an enhanced QZS zone with a larger load capacity and can realize superb vibration isolation performance with guaranteed stable equilibrium. The proposed linear positive and negative stiffness compensation mechanism presents new insights for passive vibration isolation design in many engineering applications.

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An inerter-based X-structure vibration isolator

Wang,

Qiao

et al. 2024

Acta Mech

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Performance of a shock isolator inspired by skeletal muscles

Cited by 44 publications

References 48 publications

Modeling and Analysis of Bio-Inspired, Reconfigurable, Piezo-Driven Vibration Isolator for Spacecraft

Modeling and Analysis of Bio-Inspired, Reconfigurable, Piezo-Driven Vibration Isolator for Spacecraft

A novel quasi-zero-stiffness isolation platform via tunable positive and negative stiffness compensation mechanism

An inerter-based X-structure vibration isolator

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