Bio-inspired polygonal skeleton structure for vibration isolation:Design,modelling,and experiment

作     者：YAN Ge WANG Sen ZOU HongXiang ZHAO LinChuan GAO QiuHua ZHANG WenMing YAN Ge;WANG Sen;ZOU HongXiang;ZHAO LinChuan;GAO QiuHua;ZHANG WenMing

作者机构：State Key Laboratory of Mechanical System and VibrationSchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Aerospace Control Technology InstituteShanghai 201109China 

基　　金：This work was supported by the National Science Fund for Distinguished Young Scholars(Grant No.11625208) the Innovation Program of Shanghai Municipal Education Commission(Grant No.2019-01-07-00-02-E00030) the Program of Shanghai Academic/Technology Research Leader(Grant No.19XD1421600) 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2020年第63卷第12期

页      码：2617-2630页

摘      要：Inspired by the safe landing of a cat falling from a high altitude,a bio-inspired polygonal skeleton(BIPS) structure is proposed,and its nonlinear characteristics are systematically studied to explore its potential application in the suppression of vibration. The polygon is formed by the skeleton structure of the cat’s entire body and the ground. The BIPS system consists of two symmetrical bionic legs with three robs(as skeleton) and four horizontal springs(as muscle). Two bionic legs are connected through the bearing platform(as spine),which could adjust the distance between the two bionic legs. A theoretical model is developed to characterize its stiffness nonlinearity through geometrical and mechanical analysis. Parameter analysis reveals that the BIPS structure has diverse stiffness,including nonlinear positive stiffness and negative stiffness. By imitating adjustment of leg posture and telescopic function of the spine(control the distance between legs),these flexible stiffness properties can be adjusted by structure parameters. In addition,the load capacity and working range can also be designed by the length of the bars,the initial angle,the mounting position,and the spring stiffness. The experimental setup is established,and the vibration isolation performance under various excitation is tested. The experimental results verify the accuracy of the dynamic model and also show that the proposed BIPS structure can suppress the vibration effectively under a variety of excitations. These peculiarities may provide potential possibility of an innovative approach to passive vibration control and isolation.

主 题 词：bio-inspired polygonal skeleton structure nonlinear stiffness passive vibration isolator 

学科分类：12[管理学] 083002[083002] 1204[管理学-公共管理类] 120402[120402] 0830[工学-生物工程类] 08[工学] 0837[0837] 

核心收录：

D　O　I：10.1007/s11431-020-1568-8

馆 藏 号：203981740...