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Supervised by Ministry of Industry and Information Technology of The People''s Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:Xin Huo,Shuangpeng Zheng,Yu Yao,Weishan Chen.A Practical Strategy of Unbalance Identification and Correction for 2-DOF Precision Centrifuges[J].Journal of Harbin Institute Of Technology(New Series),2018,25(1):29-38.DOI:10.11916/j.issn.1005-9113.16083.
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A Practical Strategy of Unbalance Identification and Correction for 2-DOF Precision Centrifuges
Xin Huo1, Shuangpeng Zheng1, Yu Yao1,Weishan Chen2
(1.Control and Simulation Center, School of Astronautics, Harbin Institute of Technology, Harbin 150080, China;2.School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150080, China)
Abstract:
Unbalance existing in the mechanical systems is one of the most common causes which leads to unexpected vibration, nonsmooth motions, uncertain dynamics and even instability. In this paper, the problem of unbalance identification and correction is investigated for the countershaft system of a precision centrifuge with two degrees of freedom. According to the characteristics of the load under test installed on the countershaft, a gradual subdivision algorithm is proposed to identify the phase of the unbalance, and its amplitude is calculated by using a space vector algorithm, where the vibration information of the mainshaft system is obtained by utilizing two axis-layout displacement transducers installed associated to the mainshaft. Based on ADAMS software, some numerical simulations are presented and compared, and further, the validity of the strategy is demonstrated by experimental examples.
Key words:  dynamic unbalance  identification and correction  precision centrifuge  countershaft system  ADAMS
DOI:10.11916/j.issn.1005-9113.16083
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Descriptions in Chinese:
  

二自由度精密离心机动不平衡辨识与校正方法

霍鑫1,郑双朋1,姚郁1,陈维山2

(1. 哈尔滨工业大学,航天学院 控制与仿真中心,哈尔滨 150080;

2. 哈尔滨工业大学,机械工程学院,哈尔滨 150080)

中文说明:

转动机械系统中存在的动不平衡是引起系统振动、非平滑运动、不确定动态甚至失稳的重要因素,本文针对二自由度精密离心机回转轴系的动不平衡辨识与校正问题展开研究。首先,通过对回转台自身及安装于回转台上被测负载特性的分析,提出一种逐步细分算法辨识得到动不平衡相位;其次,利用离心机主轴轴向布置的两个微位移传感器,获得主轴轴系振动信息,利用已经获得的动不平衡相位并采用空间矢量算法计算回转轴系动不平衡幅值。最后,基于机械系统动力学仿真软件ADAMS对辨识算法的正确性进行了仿真,并通过实验验证了该算法的正确定和有效性。

关键词:动不平衡,辨识校正,精密离心机,回转轴系,ADAMS

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