纺织学报 ›› 2021, Vol. 42 ›› Issue (11): 173-178.doi: 10.13475/j.fzxb.20200605706

• 机械与器材 • 上一篇    下一篇

缝纫机器人对织物张力与位置的模糊阻抗控制

王晓华(), 王育合, 张蕾, 王文杰   

  1. 西安工程大学 电子信息学院, 陕西 西安 710048
  • 收稿日期:2020-06-19 修回日期:2021-03-07 出版日期:2021-11-15 发布日期:2021-11-29
  • 作者简介:王晓华(1972—),女,教授,博士。主要研究方向为机器人技术。E-mail: wangxiaohua@xpu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51905405);教育部工程科技人才培养研究项目(18JDGC029);陕西省重点研发计划项目(2019ZDLGY01-08);陕西省教育厅自然科学专项项目(19JK0375)

Force and position fuzzy impedance control of a sewing robot

WANG Xiaohua(), WANG Yuhe, ZHANG Lei, WANG Wenjie   

  1. College of Electronics and Information, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
  • Received:2020-06-19 Revised:2021-03-07 Published:2021-11-15 Online:2021-11-29

摘要:

为解决缝纫机器人末端执行器在按压织物滑动前行和按压织物缝纫时需要保证织物不起褶皱且缝纫轨迹针脚均匀的问题,采用模糊阻抗控制方法对机器人末端位置以及机器人末端与织物接触力的同时控制。建立缝纫机器人实际缝纫系统模型,采取将机器人末端按压织物的力与按压位置进行力/位阻抗控制的策略,并根据模糊规则选取了缝纫系统最优阻抗参数。实验结果表明:模糊阻抗控制方法能够实现机器人操作织物的位置和机器人末端按压织物操作力之间的动态平衡,能够在保证机器人各关节平稳运动的基础上实现缝纫时接触力和位置的同时控制要求。

关键词: 缝纫机器人, 缝纫系统, 模糊阻抗控制, 接触力, 按压位置

Abstract:

The end-effector of a sewing robot needs constant force when pressing the fabric for forward movement and sewing so as to ensure wrinkle free in fabrics and uniform sewing track,the fuzzy impedance control method was used to control simultaneously the robot end position and the contact force between the robot end and the fabric. According to the actual sewing task of the sewing robot, the system model was established, and the force/impedance control strategy was adopted to control the force and position of the robot's end press on the fabric, and the optimal impedance parameters of the sewing system were selected according to fuzzy rules. The dynamic balance between the position of the robot operating the fabric and the operating force pressing the fabric at the end of the robot was established, and the simultaneous control requirements of the contact force and position during sewing achieved on the basis of ensuring the smooth movement of each joint of the robot.

Key words: sewing robot, sewing system, fuzzy impedance control, contact force, press position

中图分类号: 

  • TP242

图1

缝纫机器人工作平台"

图2

基于位置的阻抗控制结构原理图 注:θ为机器人关节角度,(°)。"

图3

缝纫机器人模糊阻抗控制器原理框图"

表1

ΔMd的模糊规则表"

e ec
NB NM NS Z PS PM PB
NB PB PB PM PM PS Z Z
NM PB PB PM PS PS Z NS
NS PM PM PM PS Z NS NS
Z PM PM PS Z NS NM NM
PS PS PS Z NS NS NM NM
PM PS Z NS NM NM NM NB
PB Z Z NM NM NM NB NB

图4

缝纫机器人末端力及位置跟踪对比曲线"

图5

位置阻抗控制与模糊阻抗控制力及位置跟踪曲线"

图6

机器人操作织物缝纫"

图7

机器人末端X、Y、Z方向移动曲线"

图8

机器人各关节角位移、角速度及角加速度曲线 注:--- 关节1; ……关节2; --▲-- 关节3; ----关节4; —— 关节5; —■—关节6。"

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