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Front. Inform. Technol. Electron. Eng.  2012, Vol. 13 Issue (8): 593-600    DOI: 10.1631/jzus.C1100379
    
An iterative linear quadratic regulator based trajectory tracking controller for wheeled mobile robot
Hao-jie Zhang, Jian-wei Gong, Yan Jiang, Guang-ming Xiong, Hui-yan Chen
Intelligent Vehicle Research Center, Beijing Institute of Technology, Beijing 100081, China
An iterative linear quadratic regulator based trajectory tracking controller for wheeled mobile robot
Hao-jie Zhang, Jian-wei Gong, Yan Jiang, Guang-ming Xiong, Hui-yan Chen
Intelligent Vehicle Research Center, Beijing Institute of Technology, Beijing 100081, China
 全文: PDF 
摘要： We present an iterative linear quadratic regulator (ILQR) method for trajectory tracking control of a wheeled mobile robot system. The proposed scheme involves a kinematic model linearization technique, a global trajectory generation algorithm, and trajectory tracking controller design. A lattice planner, which searches over a 3D (x, y, θ) configuration space, is adopted to generate the global trajectory. The ILQR method is used to design a local trajectory tracking controller. The effectiveness of the proposed method is demonstrated in simulation and experiment with a significantly asymmetric differential drive robot. The performance of the local controller is analyzed and compared with that of the existing linear quadratic regulator (LQR) method. According to the experiments, the new controller improves the control sequences (v, ω) iteratively and produces slightly better results. Specifically, two trajectories, ‘S’ and ‘8’ courses, are followed with sufficient accuracy using the proposed controller.
关键词： Lattice planner;  Global trajectory;  Kinematic model;  Trajectory tracking controller;  Iterative linear quadratic regulator (ILQR)    
Abstract: We present an iterative linear quadratic regulator (ILQR) method for trajectory tracking control of a wheeled mobile robot system. The proposed scheme involves a kinematic model linearization technique, a global trajectory generation algorithm, and trajectory tracking controller design. A lattice planner, which searches over a 3D (x, y, θ) configuration space, is adopted to generate the global trajectory. The ILQR method is used to design a local trajectory tracking controller. The effectiveness of the proposed method is demonstrated in simulation and experiment with a significantly asymmetric differential drive robot. The performance of the local controller is analyzed and compared with that of the existing linear quadratic regulator (LQR) method. According to the experiments, the new controller improves the control sequences (v, ω) iteratively and produces slightly better results. Specifically, two trajectories, ‘S’ and ‘8’ courses, are followed with sufficient accuracy using the proposed controller.
Key words: Lattice planner    Global trajectory    Kinematic model    Trajectory tracking controller    Iterative linear quadratic regulator (ILQR)
收稿日期: 2011-12-26 出版日期: 2012-08-02
CLC:  TP242.6  
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Hao-jie Zhang
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Guang-ming Xiong
Hui-yan Chen

引用本文:

Hao-jie Zhang, Jian-wei Gong, Yan Jiang, Guang-ming Xiong, Hui-yan Chen. An iterative linear quadratic regulator based trajectory tracking controller for wheeled mobile robot. Front. Inform. Technol. Electron. Eng., 2012, 13(8): 593-600.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1100379    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2012/V13/I8/593

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