基于双级菱形压电作动器的伞状天线振动主动隔离研究
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- 英文论文题名：Research on Active Vibration Isolation of Umbrella Antenna Based on Double-stage Rhombus Piezoelectric Stack Actuators
- 论文作者：吴啟琛 ; 肖刚 ; 葛东明 ; 谢石林 ; 徐明龙 ; 张希农
- 英文论文作者：Wu Qichen ; Ge Dongming ; Xiao Gang ; Xie Shilin ; Zhang Xinong ; Xu Minglong ; State Key Laboratory for Strength and Vibration of Machanical Structures ; Xi'an Jiaotong University ; China Academy of Space Technology
- 年：2016
- 作者机构：西安交通大学航天航空学院/机械结构强度与振动国家重点实验室;中国空间技术研究所;
- 论文关键词：压电堆 ; 双级菱形压电作动器 ; 振动主动隔离 ; 模糊控制
- 英文论文关键词：double-stage rhombus piezoelectric stack actuators ; active vibration isolation ; fuzzy control algorithm
- 会议召开时间：2016-08-12
- 会议录名称：第十六届全国模态分析与试验学术会议论文集
- 语种：中文
- 分类号：V443.4
- 学会代码：ZGZH
- 会议名称：第十六届全国模态分析与试验学术会议
- 会议地点：中国天津
- 主办单位：中国振动工程学会模态分析与试验专业委员会
- 学会名称：中国振动工程学会
- 页数：14
- 文件大小：1969k
- 原文格式：D
- 会议级别：全国
摘要
本文提出了一种采用新型双级菱形压电作动器的大型伞状天线振动隔离平台。所使用作动器由压电堆、两个内外嵌套的菱形放大机构以及柔性铰链组成。首先,推导了双级菱形压电作动器的几何放大关系,建立了双级菱形压电作动器输入输出关系的理论模型。对该作动器进行了有限元仿真,理论模型分析结果与有限元仿真结果吻合较好(误差在3%以内),证明了该理论模型的正确性。同时,分析结果显示该双级菱形压电作动器在无负载情况下的输出位移可达240um,在两端固定情况下最大作动力可达2000N,具有良好的作动性能。其次,建立了天线隔振平台系统的振动控制微分方程;最后,基于模糊控制策略,对该平台在不同激励下的隔振性能进行了主动控制仿真研究,结果表明该天线振动隔离平台能够有效地隔离天线指向扰动,显著地提高天线指向稳定性。
This paper puts up a vibration isolation platform of large-scale umbrella antenna,which is based on four double-stage diamond piezoelectric actuators.The actuactor consists of piezoelectric stack,two rhombus amplification mechanism connecting with each other and flexible hinge.Firstly,deduced geometric amplification relationship of the actuactor and built the theory model of the relationship between input and output of the actuator.The finite element simulation of the actuator turns out that the theory model of the actuator is correct(ralative error is within 3%).Meanwhile,the result shows that the actuator has a good actuator performance that it can output a displacement of 240 um without load and output maximum force of 2000 N when both ends are fixed.Then,deduced the differential equation of vibration control of the vibration isolation platform.Finally,simulated the performance of vibration isolation of the platform under different excitations based on fuzzy control strategy.The result shows that the vibration isolation plaform can isolate antenna pointing disturbance effectively and improve the stability of antenna pointing.
This paper puts up a vibration isolation platform of large-scale umbrella antenna,which is based on four double-stage diamond piezoelectric actuators.The actuactor consists of piezoelectric stack,two rhombus amplification mechanism connecting with each other and flexible hinge.Firstly,deduced geometric amplification relationship of the actuactor and built the theory model of the relationship between input and output of the actuator.The finite element simulation of the actuator turns out that the theory model of the actuator is correct(ralative error is within 3%).Meanwhile,the result shows that the actuator has a good actuator performance that it can output a displacement of 240 um without load and output maximum force of 2000 N when both ends are fixed.Then,deduced the differential equation of vibration control of the vibration isolation platform.Finally,simulated the performance of vibration isolation of the platform under different excitations based on fuzzy control strategy.The result shows that the vibration isolation plaform can isolate antenna pointing disturbance effectively and improve the stability of antenna pointing.
引文
[1]谭天乐,朱春艳,朱东方,宋婷,孙宏丽,顾玥,杨雨.航天器微振动测试、隔离、抑制技术综述[J].上海航天,2014,06:36-45+51.
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[7]Cao Q S,Hong Y Y.Research on Active Vibration Isolation System for Precision Instrument Based on Four Piezoelectric Stack Actuators[J].Applied Mechanics&Materials,2010,44-47:1034-1038.
[8]Luo Y,Xu M,Yan B,et al.PD control for vibration attenuation in Hoop truss structure based on a novel piezoelectric bending actuator[J].Journal of Sound and Vibration,2015,339:11-24.
[9]武彤晖,基于压电作动器的多轴微加速度标定台研究[D],西安:西安交通大学,2014
[10]张春林,张希农,陈杰,等.菱形微位移压电作动器的输入输出线性建模[J].西安交通大学学报,2014,48(5):102-106.
[11]石辛民,郝整清.模糊控制及其MATLAB仿真[M].北京:清华大学出版社,2008.
[2]Badel A,Breton R L,Formosa F,et al.Precise positioning and active vibration isolation using piezoelectric actuator with hysteresis compensation[J].Journal of Intelligent Material Systems&Structures,2013,25(2):155-163.
[3]Wimitzer J,Kistner A,Gaul L.Optimal placement of semi-active joints in large space truss structures[C].Proceedings of SPIE,2002,4697:246-257
[4]Preumont A,Horodinca M,Romanescu I,et al.A six-axis single-stage active vibration isolator based on Stewart platform[J].Journal of Sound&Vibration,2007,300(3-5):644-661.
[5]Xu B,Jiang JS,Ou JP.Integrated optimization of structural topology and control for piezoelectric smart trusses using genetic algorithm[J].Journal of Sound and Vibration,2007,307:393-427.
[6]胡甜甜.星载伞状可展开天线设计、仿真及优化[J].航空计算技术,2015(4):109-111.
[7]Cao Q S,Hong Y Y.Research on Active Vibration Isolation System for Precision Instrument Based on Four Piezoelectric Stack Actuators[J].Applied Mechanics&Materials,2010,44-47:1034-1038.
[8]Luo Y,Xu M,Yan B,et al.PD control for vibration attenuation in Hoop truss structure based on a novel piezoelectric bending actuator[J].Journal of Sound and Vibration,2015,339:11-24.
[9]武彤晖,基于压电作动器的多轴微加速度标定台研究[D],西安:西安交通大学,2014
[10]张春林,张希农,陈杰,等.菱形微位移压电作动器的输入输出线性建模[J].西安交通大学学报,2014,48(5):102-106.
[11]石辛民,郝整清.模糊控制及其MATLAB仿真[M].北京:清华大学出版社,2008.