引用本文: | 孙国法,赵尔全,张国巨,黄鸣宇.基于扰动观测器补偿的机械臂非奇异快速终端滑模控制[J].控制理论与应用,2022,39(8):1506~1515.[点击复制] |
SUN Guo-fa,ZHAO Er-quan,ZHANG Guo-ju,HUANG Ming-yu.Non-singular fast terminal sliding mode control of manipulator based on disturbance observe compensation[J].Control Theory and Technology,2022,39(8):1506~1515.[点击复制] |
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基于扰动观测器补偿的机械臂非奇异快速终端滑模控制 |
Non-singular fast terminal sliding mode control of manipulator based on disturbance observe compensation |
摘要点击 2231 全文点击 669 投稿时间:2021-12-07 修订日期:2022-03-08 |
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DOI编号 10.7641/CTA.2022.11191 |
2022,39(8):1506-1515 |
中文关键词 机械臂控制 非奇异快速终端滑模控制器 fal函数 扰动观测器 滑模控制 有限时间收敛 |
英文关键词 manipulator control non-singular fast terminal sliding mode controller fal function disturbance observer sliding mode control finite-time convergence |
基金项目 国家自然科学基金项目(61703224, 61640302)资助. |
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中文摘要 |
针对机械臂系统在实际应用中存在的建模误差及未知扰动问题, 设计了一种基于扰动观测器的改进型非
奇异快速终端滑模控制策略. 通过扰动观测器准确估计系统存在的总扰动, 并设计恰当的非线性增益函数使扰动观
测误差指数收敛, 实现了对控制器的前馈补偿. 考虑到终端滑模存在的奇异性问题, 结合扰动观测器设计了非奇异
快速终端滑模控制器, 在保证跟踪误差有限时间收敛的同时抑制了滑模控制固有的抖振现象. 同时在控制器设计过
程中, 用fal函数代替sig函数有利于削弱滑模控制抖振, 提高系统稳定性及跟踪精度. 最后, 利用MATLAB软件进行
实验仿真, 验证了所设计控制器的有效性. |
英文摘要 |
In order to solve the associated modeling error problems and the unknown disturbances in the robotic manipulator
system, based on a disturbance observer, an improved non-singular fast terminal sliding mode control strategy is
designed. By using the disturbance observer, the total disturbance of the system is accurately estimated, then appropriate
gain functions are designed to enhance the exponential convergence of the disturbance observation error and achieve feedforward
compensation for the controller. Considering the singularity problem in the terminal sliding mode, a non-singular
fast terminal sliding mode controller is expressed based on the disturbance observer, which can guarantee the finite-time
convergence of tracking errors and alleviate the effect of chattering of the controller output. Besides, in the process of
controller design, this work uses fal function instead of sig function to reduce the chattering influence and improves the
stability of the system and the tracking performance. Finally, by utilizing MATLAB software to conduct experimental
simulation, the effectiveness of the proposed controller is further verified. |
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