航空学报 > 2023, Vol. 44 Issue (13): 262-272   doi: 10.7527/S1000-6893.2022.27919

机器人纵扭超声铣边颤振在线监测方法

王涛1, 高雪峰2, 祝景萍3, 董松1, 孙连军1, 郑侃1()   

  1. 1.南京理工大学 机械工程学院,南京 210094
    2.上海卫星装备研究所,上海 200240
    3.中国航空工业昌河飞机工业(集团)有限责任公司,景德镇 333002
  • 收稿日期:2022-08-12 修回日期:2022-08-30 接受日期:2022-10-19 出版日期:2023-03-23 发布日期:2023-03-21
  • 通讯作者: 郑侃 E-mail:zhengkan@njust.edu.cn
  • 基金资助:
    国家自然科学基金(52075265);复杂装备系统动力学前沿科学中心领军人才团队项目(FSCCESD220401)

Chatter online monitoring of robotic longitudinal⁃torsional ultrasonic edge trimming

Tao WANG1, Xuefeng GAO2, Jinping ZHU3, Song DONG1, Lianjun SUN1, Kan ZHENG1()   

  1. 1.School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
    2.Shanghai Institute of Spacecraft Equipment,Shanghai 200240,China
    3.AVIC Changhe Aircraft Industry (Group) Corporation Ltd. ,Jingdezhen 333002,China
  • Received:2022-08-12 Revised:2022-08-30 Accepted:2022-10-19 Online:2023-03-23 Published:2023-03-21
  • Contact: Kan ZHENG E-mail:zhengkan@njust.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52075265);The Project on the Technological Leading Talent Teams Led by Frontiers Science Center for Complex Equipment System Dynamics(FSCCESD220401)

摘要:

针对因信息孤立导致机器人纵扭超声铣边加工颤振误判问题,提出基于多源特征融合的颤振监测方法。首先,采用最大相关最小冗余(MRMR)算法研究不同特征量对颤振的敏感程度,构建了多源特征分类模型。运用主成分分析法(PCA)将排序前3的敏感特征(能量熵、重心频率、波形因子)融合为新的颤振特征,并基于拉依达准则确定系统颤振阈值为0.44,将机器人纵扭超声铣边加工过程分为稳定、轻微颤振及严重颤振3种状态。最后,编写了机器人纵扭超声铣边颤振在线监测软件,实现了颤振状态的精准检测和识别。实验结果表明,经融合后的特征相较于传统单一特征颤振监测响应时间可提前1.536 s。

关键词: 机器人纵扭超声铣边, 颤振在线监测, 特征选择, 多源信息融合, 颤振阈值

Abstract:

To address the problem of chatter misjudgment in robotic longitudinal-torsional ultrasonic edge trimming due to isolated information, this paper proposes a chatter monitoring method based on multi-source features fusion. Firstly, the Maximum Correlation Minimum Redundancy (MRMR) algorithm is applied for studying the sensitivity of different features to chatter, and a multi-source feature classification model is constructed. Then, Principal Component Analysis (PCA) is used to fuse the top 3 sensitive features (energy entropy, center of gravity frequency, and waveform factor) into a new chatter feature. Meanwhile, the chatter threshold of the system is determined to be 0.44 based on the PauTa criterion. The robotic longitudinal-torsional ultrasonic edge trimming process is divided into three states: stable, slight chatter and severe chatter. Finally, the online monitoring software of the robotic longitudinal-torsional ultrasonic edge trimming chatter is written to achieve accurate detection and identification of chatter state. Experimental results of this study show that the response time of fused features can be 1.536 s earlier than that of the traditional single feature.

Key words: robotic longitudinal-torsional ultrasonic edge trimming, chattering online monitoring, feature selection, multi-source information fusion, chatter threshold

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