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高忠林, 胡绳荪, 殷凤良, 王睿. GMAW系统电流与弧长的滑模变结构控制仿真[J]. 焊接学报, 2007, (6): 53-56.
引用本文: 高忠林, 胡绳荪, 殷凤良, 王睿. GMAW系统电流与弧长的滑模变结构控制仿真[J]. 焊接学报, 2007, (6): 53-56.
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GAO Zhonglin, HU Shengsun, YIN Fengliang, WANG Rui. Simulation of feedback linearization and sliding mode control in GMAW systems[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (6): 53-56.
Citation: GAO Zhonglin, HU Shengsun, YIN Fengliang, WANG Rui. Simulation of feedback linearization and sliding mode control in GMAW systems[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (6): 53-56.
shu

GMAW系统电流与弧长的滑模变结构控制仿真

Simulation of feedback linearization and sliding mode control in GMAW systems

    摘要
  • 摘要: 在分析熔化极气体保护焊(GMAW)的基础上,建立电流及弧长的非线性数学模型。应用基于微分几何的反馈线性化方法,将GMAW过程电流及弧长模型同胚映射为等价的线性系统,使复杂的非线性控制问题转化成简单的线性系统的控制问题,使控制器设计的复杂程度降低,控制效果明显优于对非线性系统的直接控制。把滑模变结构控制方法应用于焊接电流及弧长的控制中,Matlab仿真结果表明,该方法可以满足焊接中电弧弧长的精确控制,同时,对系统参数摄动和外部扰动具有较强的鲁棒性。

     

    Abstract: An investigation was made to the gas metal arc welding (GMAW)systems, and further for the control purpose a dynamic system and control model was proposed according to the characteristics of the GMAW systems.By means of the feedback linearization procedure of differential geometry, an equivalent, fully controllable and linear model was derived via a homomorphic transformation and a sliding mode controller was constructed for the GMAW system.The simulation results by Matlab showed the effectiveness of the proposed controller and the method is satisfied with exact control of welding arc length.

     

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