中国机械工程 ›› 2026, Vol. 37 ›› Issue (1): 73-82.DOI: 10.3969/j.issn.1004-132X.2026.01.009

• 机械基础工程 • 上一篇    下一篇

气动肌肉驱动六自由度并联平台的高精度位姿控制

孟德远(), 张猛, 刘送永, 唐超权   

  1. 中国矿业大学机电工程学院, 徐州, 221116
  • 收稿日期:2024-09-10 出版日期:2026-01-25 发布日期:2026-02-05
  • 通讯作者: 孟德远
  • 作者简介:孟德远*(通信作者),男,1982年生,副教授、硕士研究生导师。研究方向为气压传动系统精密控制、矿山装备智能化技术。发表论文40余篇。E-mail:tinydreams@126.com
  • 基金资助:
    国家自然科学基金(51505474);流体动力与机电系统国家重点实验室开放基金(GZKF-202210)

High Precision Position and Posture Control of 6-DOF Parallel Platforms Driven by Pneumatic Muscles

MENG Deyuan(), ZHANG Meng, LIU Songyong, TANG Chaoquan   

  1. School of Mechanical and Electric Engineering,China University of Mining and Technology,Xuzhou,Jiangsu,221116
  • Received:2024-09-10 Online:2026-01-25 Published:2026-02-05
  • Contact: MENG Deyuan

摘要:

针对气动肌肉输出力特性复杂、六自由度并联平台具有较大参数不确定性和模型不确定性等控制难点,采用反步法设计了基于关节空间的交叉耦合自适应鲁棒控制器,以增强关节协同运动的控制能力。该控制器为两层级联结构,每层包含一个在线参数估计模块和一个基于非线性模型的鲁棒控制模块。在线参数估计模块通过在线最小二乘参数估计减小模型参数的不确定性,鲁棒控制模块利用鲁棒控制策略减小参数估计误差、非线性建模误差和外界干扰造成的影响。实验结果表明,所设计的控制器能提高并联平台位姿控制精度。平台做升降运动、三自由度复合平移运动和六自由度位姿混合运动时,位置的平均跟踪误差不超过0.84 mm,姿态的平均跟踪误差不超过0.03°,且对干扰具有较强的性能鲁棒性。

关键词: 六自由度并联平台, 气动肌肉, 自适应鲁棒控制, 交叉耦合, 运动模拟器

Abstract:

To address the control challenges such as the complex output force characteristics of pneumatic muscles, and the significant parameter uncertainties and uncertain nonlinearities of the 6-DOF parallel platforms, a cross-coupling adaptive robust controller in joint spaces was developed to enhance the control capability for coordinated joint motions by back-stepping method. The proposed controller featured a two-layer cascade structure. Each layer integratd an online parameter estimation module and a nonlinear model-based robust control module. The parameter estimation module employed an online recursive least square estimation algorithm to reduce the extents of parametric uncertainties, while the robust control module utilized a nonlinear robust control method to attenuate the effects of parameter estimation errors, uncertain nonlinearities and disturbances. Experimental results demonstrate that the proposed controller may significantly improve the tracking accuracy of the parallel platforms. During lifting, in the pocesses of 3-DOF composite translational motion and 6-DOF hybrid pose motion, the mean tracking error of position tracking error remains within 0.84 mm, and the mean tracking error of posture tracking error is confined to 0.03°. Furthermore, the controller exhibits strong performance robustness against disturbances.

Key words: 6-degree-of-freedom(6-DOF) parallel platform, pneumatic muscle, adaptive robust control, cross-coupling, motion simulator

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