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Modeling and controller design of a 6-DOF precision positioning system

机译:六自由度精密定位系统的建模和控制器设计

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摘要

A key hurdle to meet the needs of microano manipulation in some complex cases is the inadequate workspace and flexibility of the operation ends. This paper presents a 6-degree of freedom (DOF) serial-parallel precision positioning system, which consists of two compact type 3-DOF parallel mechanisms. Each parallel mechanism is driven by three piezoelectric actuators (PEAs), guided by three symmetric T-shape hinges and three elliptical flexible hinges, respectively. It can extend workspace and improve flexibility of the operation ends. The proposed system can be assembled easily, which will greatly reduce the assembly errors and improve the positioning accuracy. In addition, the kinematic and dynamic model of the 6-DOF system are established, respectively. Furthermore, in order to reduce the tracking error and improve the positioning accuracy, the Discrete-time Model Predictive Controller (DMPC) is applied as an effective control method. Meanwhile, the effectiveness of the DMCP control method is verified. Finally, the tracking experiment is performed to verify the tracking performances of the 6-DOF stage.
机译:在某些复杂的情况下,满足微/纳米操作需求的关键障碍是工作空间不足和操作末端的灵活性。本文提出了一种6自由度(DOF)串并联精密定位系统,该系统由两个紧凑型3-DOF并联机构组成。每个并联机构均由三个压电致动器(PEA)驱动,分别由三个对称的T形铰链和三个椭圆形柔性铰链引导。它可以扩展工作空间并提高操作端的灵活性。所提出的系统可以容易地组装,这将大大减少组装误差并提高定位精度。另外,分别建立了六自由度系统的运动学模型和动力学模型。此外,为了减少跟踪误差并提高定位精度,离散时间模型预测控制器(DMPC)被用作一种有效的控制方法。同时,验证了DMCP控制方法的有效性。最后,进行跟踪实验以验证6自由度级的跟踪性能。

著录项

  • 来源
    《Mechanical systems and signal processing》 |2018年第may1期|536-555|共20页
  • 作者单位

    Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China,School of Engineering, University of Warwick, Coventry CV4 7AL, UK;

    Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China,School of Engineering, University of Warwick, Coventry CV4 7AL, UK;

    School of Engineering, University of Warwick, Coventry CV4 7AL, UK;

    Division of Microrobotics and Control Engineering, University of Oldenburg, 26111 Oldenburg, Germany;

    Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China;

    Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China;

    Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China;

    Robotics and Mechatronics Research Laboratory, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC 3800, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    6-DOF precision positioning system; Modeling; Model predictive controller; Tracking control;

    机译:6自由度精密定位系统;造型;模型预测控制器;追踪控制;

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