新型三维平移自由度Delta机构准零刚度隔振平台及特性

doi:10.12382/bgxb.2021.0144

兵工学报 ›› 2022, Vol. 43 ›› Issue (3): 667-675.doi: 10.12382/bgxb.2021.0144

新型三维平移自由度Delta机构准零刚度隔振平台及特性

翁泽宇¹，刘胜利¹，吴晓郁¹，余行行¹，王武江¹，朱甫宏²

(1.浙江工业大学机械工程学院，浙江杭州 310023；2.31606部队，浙江湖州 313005)

上线日期:2022-04-07
作者简介:翁泽宇（1962—），男，教授，博士生导师。E-mail: wengzy8888@163.com
基金资助:
国家自然科学基金项目（51875527）

A Novel 3-DOF Quasi-zero-stiffness Vibration Isolation Platform with Delta Mechanism and Its Characteristics

WENG Zeyu¹， LIU Shengli¹， WU Xiaoyu¹， YU Hanghang¹， WANG Wujiang¹， ZHU Fuhong²

(1.College of Mechanical Engineering，Zhejiang University of Technology，Hangzhou 310023，Zhejiang，China；2.Unit 31606 of PLA，Huzhou 313005，Zhejiang，China)

Online:2022-04-07

摘要/Abstract

摘要： 为实现空间三维低频隔振，提出一种具有空间三维平移自由度的新型Delta机构，并以此为基础，演绎成为具有负刚度特性的并联机构，然后并联正刚度的竖直弹簧，得到一种新型三自由度并联机构准零刚度隔振平台。通过建立隔振平台的静力学和动力学模型，分析其动平台在不同空间坐标位置时各自由度方向上的刚度特性和固有频率。结果表明：隔振平台在水平方向上静力学特性呈线性关系，且仅与水平方向位移有关；在竖直方向具有准零刚度特性，可获得较低的固有频率，且仅与竖直方向位移有关，当动平台偏离平衡位置，零刚度特性不再明显。对隔振平台是否引入具有负刚度特性并联机构进行竖直方向固有频率测试，测试结果验证了引入负刚度特性并联机构的隔振平台可大幅度地降低系统在竖直方向的固有频率。

关键词: Delta机构, 隔振平台, 准零刚度, 负刚度机构

Abstract: A novel Delta mechanism with three translational degrees of freedom in space is proposed to realize the spatial three-dimensional low-frequency vibration isolation.A parallel mechanism with negative stiffness is deduced from the Delta mechanism. Then a three-DOF parallel quasi-zero stiffness vibration isolation platform is constructed by connecting the parallel mechanism with a vertical spring with positive stiffness.The statics and dynamics models of the vibration isolation platform are established to analyze the stiffness characteristics and natural frequencies of the vibration isolation platform in different spatial coordinates.The result shows that the static characteristic of the vibration isolation platform is linear in the horizontal direction and is only related to the horizontal displacement. In the vertical direction，it has quasi-zero stiffness characteristic，which can obtain a lower natural frequency，and is only related to the vertical displacement. When the vibration isolation platform deviates from the equilibrium position，the zero-stiffness characteristic is no longer obvious. The vertical natural frequencies of the vibration isolation platform with the parallel mechanisms with and without negative stiffness were test. The test results show that the vibration isolation platform with the parallel mechanism with negative stiffness can greatly reduce the vertical natural frequency of the system.

Key words: Deltamechanism, vibrationisolationplatform, quasi-zero-stiffness, negativestiffnessmechanism

中图分类号:

TH113.1

翁泽宇，刘胜利，吴晓郁，余行行，王武江，朱甫宏. 新型三维平移自由度Delta机构准零刚度隔振平台及特性[J]. 兵工学报, 2022, 43(3): 667-675.

WENG Zeyu， LIU Shengli， WU Xiaoyu， YU Hanghang， WANG Wujiang， ZHU Fuhong. A Novel 3-DOF Quasi-zero-stiffness Vibration Isolation Platform with Delta Mechanism and Its Characteristics[J]. Acta Armamentarii, 2022, 43(3): 667-675.

参考文献

［1］ IBRAHIM R A.Recent advances in nonlinear passive vibration isolators[J].Journal of Sound and Vibration，2008，314(3/4/5):371-452.
[2］陆泽琦，陈立群.非线性被动隔振的若干进展[J].力学学报，2017，49(3):550-564.
LU Z Q，CHEN L Q. Some recent progresses in nonlinear passive isolations of vibrations [J].Chinese Journal of Theoretical and Applied Mechanics，2017，49(3): 550-564.(in Chinese)
[3］徐鉴.振动控制研究进展综述[J].力学季刊，2015，36(4):547-565.
XU J.Advances of research on vibration control[J]. Chinese Quarterly of Mechanics，2015，36(4):547-565. (in Chinese)
[4］ PAPAIOANNOU G，VOUTSINAS A，KOULOCHERIS D.Optimal design of passenger vehicle seat with the use of negative stiffness elements[J].Proceedings of the Institution of Mechanical Engineers，Part D:Journal of Automobile Engineering，2020，234(2/3): 610-629.
[5］ ZHAO F，JI J C，YE K，et al. An innovative quasi-zero stiffness isolator with three pairs of oblique springs[J].International Journal of Mechanical Sciences，2021，192:106093.
[6］ PARK G，LEE D O，HAN J H.Development of multi-degree-of-freedom microvibration emulator for efficient jitter test of spacecraft[J].Journal of Intelligent Material Systems and Structures，2014，25(9):1069-1081.
[7］ LI B，ZHAO W，DENG Z Q. Modeling and analysis of a multi-dimensional vibration isolator based on the parallel mechanism[J]. Journal of Manufacturing Systems， 2012，31(1):50-58.
[8］魏永利.基于4-UPS/UPU并联机构的车载多维隔振平台研究[D].哈尔滨:哈尔滨工业大学，2016.
WEI Y L.Research on vehicle multi-dimensional vibration isolation platform based on 4-UPS/UPU parallel mechanism[D]. Harbin: Harbin Institute of Technology，2016. (in Chinese)
[9］温肇东，张春辉，张磊.软特性刚度在被动式Stewart隔冲平台中的应用研究[J].兵工学报，2015，36(增刊1):145-151.
WEN Z D，ZHANG C H，ZHANG L. Effect of soft stiffness on a passive Stewart shock isolation platform[J]. Acta Armamentarii，2015，36(S1):145-151. (in Chinese)
[10］ ZHOU J X，XIAO Q Y，XU D L，et al. A novel quasi-zero-stiffness strut and its applications in six-degree-of-freedom vibration isolation platform[J].Journal of Sound and Vibration， 2017，394:59-74.
[11］ WU Z J，JING X J，SUN B，et al.A 6DOF passive vibration isolator using X-shape supporting structures[J].Journal of Sound and Vibration，2016，380:90-111.
[12］郑良辰.面向多维低频振动的3-PCR并联减振机构设计及其减振性能分析[D].济南：山东大学，2018.
ZHENG L C. Design of an isolation device for multi-dimensional low frequency vibration and its performance analysis based on a 3-PCR parallel mechanism[D].Jinan：Shandong University，2018. (in Chinese)
[13］韩冲. Delta并联机构的性能分析与优化[D].西安：西安理工大学，2019.
HAN C. Performance analysis and optimization of Delta parallel mechanism[D]. Xi'an：Xi'an University of Technology，2019. (in Chinese)
[14］韩亚锋，马履中，吴伟光，等. Delta并联机器人弹性动力学研究[J].农业机械学报，2011，42(10): 197-202.
HAN Y F，MA L Z，WU W G，et al. Elastic dynamics analysis of Delta parallel robot[J]. Transactions of the Chinese Society for Agricultural Machinery，2011，42(10):197-202. (in Chinese)
[15］ WU M K，MEI J P，ZHAO Y Q，et al. Vibration reduction of delta robot based on trajectory planning[J].Mechanism and Machine Theory，2020，153:104004.

新型三维平移自由度Delta机构准零刚度隔振平台及特性

A Novel 3-DOF Quasi-zero-stiffness Vibration Isolation Platform with Delta Mechanism and Its Characteristics

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