风洞试验绳牵引并联机器人高精度控制仿真
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国家自然科学基金资助项目(11472234)、中央高校基本业务费项目(2013121019)


High precision control of wire-driven parallel robot in wind tunnel test
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    摘要:

    针对一种应用于风洞试验的六自由度绳牵引并联机器人系统,研究其支撑的飞行器模型高精度运动控制问题.首先从系统运动学角度出发,针对绳与飞行器模型之间可能出现的干涉问题,基于绳系时变结构的概念,建立了一个单自由度时变运动方程;构建了驱动系统与飞行器的动力学模型,设计了基于飞行器位姿直接反馈的比例微分控制器,并进行稳定性分析;最后,分别以单自由度和多自由度运动为例,进行绳系结构非时变系统与时变系统的数值仿真.分析结果表明,本文所建立的数学模型是正确可行的,采用一种单自由度时变结构可以有效避免俯仰运动干涉;通过合理设置预紧力,可以避免运动过程中牵引绳松弛;采用PD控制率可以实现飞行器模型的高精度运动控制,从而满足风洞试验的实际应用需求.

    Abstract:

    The high precision motion control of aircraft model supported by a sixDOF wiredriven parallel robot in the application of wind tunnel test wire is studied in this paper. Firstly, in view of the possible interference between wire and aircraft model, based on the concept of timevariant wire system, a kind of timevariant kinematic equation is designed. And the dynamic equations of the driven system and aircraft model are then established. Secondly, according to the constructed system dynamic model, a proportional and differential controller is proposed on the base of pose feedback, and the stability of the closedloop system is analyzed. Finally, numerical simulations of timeinvariant and timevariant systems are developed as the examples of singleDOF and multiDOF motion. The analysis results show that the built mathematic models are appropriate and practicable, and a singleDOF time variant system can effectively avoid the pitch motion interference. Meanwhile, the proper selection of wire pretension can keep the wire from slackness. Furthermore, a PD control law with interference compensation term realizes the aircraft′s high precision motion control, accordingly to meet the application requirements of wind tunnel test.

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引用本文

王晓光,王义龙,林麒.风洞试验绳牵引并联机器人高精度控制仿真[J].动力学与控制学报,2016,14(5):475~480; Wang Xiaoguang, Wang Yilong, Lin Qi. High precision control of wire-driven parallel robot in wind tunnel test[J]. Journal of Dynamics and Control,2016,14(5):475-480.

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  • 收稿日期:2015-09-16
  • 最后修改日期:2015-10-13
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  • 在线发布日期: 2016-10-20
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