China Mechanical Engineering

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Trajectory Tracking Control of Wheeled Mobile Robots under Longitudinal Slipping Conditions

BEI Xuying1,2;PING Xueliang1,2;GAO Wenyan1,2   

  1. 1.School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu,214122
    2.The Key Laboratory for Advanced Food Manufacturing Equipment and Technology of Jiangsu Province,Wuxi,Jiangsu,214122
  • Online:2018-08-25 Published:2018-08-27
  • Supported by:
    National Natural Science Foundation of China (No. 61305016)

纵向打滑状态下轮式移动机器人轨迹跟踪控制

贝旭颖1,2;平雪良1,2;高文研1,2   

  1. 1.江南大学机械工程学院,无锡,214122
    2.江苏省食品先进制造装备技术重点实验室,无锡,214122
  • 基金资助:
    国家自然科学基金资助项目(61305016);
    江苏省研究生科研创新计划资助项目(KYLX16_0771)
    National Natural Science Foundation of China (No. 61305016)

Abstract: An trajectory tracking control of mobile robots was presented  based on wheeled mobile robots with unknown longitudinal slip  parameters.Firstly,the kinematic model of the mobile robots under  longitudinal slips was established,and the sliding parameters were used  to express the slip degrees of the left and right wheels.Then,a  suitable sliding mode observer was designed to estimate unknown slip  parameters,and the influences of chatters on estimation of slip 
parameters were reduced by using the low-pass filters.Finally,a  trajectory tracking control law was designed based on Lyapunov direct  method,and a method of determine the control parameters was proposed  according to the pole distributions of the control systems.Numerical  simulation results show that the proposed trajectory tracking control  method is accurate and effective.

Key words: wheeled mobile robot, longitudinal slip, sliding mode observer, trajectory tracking

摘要: 针对轮式移动机器人纵向打滑状态下滑动参数未知的轨迹跟踪控制问题,提出了一种轨迹跟踪控制方法。建立了纵向打滑状态下移动机器人的运动学模型,用滑动 参数表示左右轮的打滑程度;设计合适的滑模观测器对未知的滑动参数进行估计,并通过低通滤波器减少抖振对估计结果产生的影响;基于Lyapunov直接法设计轨迹跟踪控制律,并提出了一种根据控制系统的极点分布确定控制参数的方法。仿真结果验证了所提方法的准确性和有效性。

关键词: 轮式移动机器人, 纵向打滑, 滑模观测器, 轨迹跟踪

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