四辊卷板机侧辊位移跟踪控制

发布时间：2018-03-11 11:46

本文选题：四辊卷板机　切入点：位移跟踪　出处：《机械工程学报》2017年14期 　论文类型：期刊论文

【摘要】：针对四辊卷板机侧辊位移跟踪控制存在负载变化、参数摄动和未建模动态等不确定性问题,提出一种基于非线性扰动观测器的自适应滑模控制策略。采用非线性扰动观测器在线获取并补偿等效扰动;针对引入非线性扰动观测器后的系统,采用反步法设计自适应滑模控制器,利用自适应律动态补偿扰动观测误差,以降低滑模控制器的切换增益。该设计方法放宽了滑模切换增益对系统不确定性上界的先验性要求,降低了外界干扰和系统不确定性对侧辊位移跟踪性能的影响。同时,采用李雅普洛夫方法证明了侧辊位移跟踪闭环控制系统的稳定性。根据工程实际参数进行仿真,结果表明,该控制策略对系统的不确定性,特别是负载变化具有较强的鲁棒性,可以满足侧辊位移快速、精确跟踪的要求。
[Abstract]:In view of the uncertainty problems such as load change, parameter perturbation and unmodeled dynamic, etc, the displacement tracking control of side roll of four-roll plate winder exists uncertainty. An adaptive sliding mode control strategy based on nonlinear disturbance observer is proposed. The nonlinear disturbance observer is used to obtain and compensate the equivalent disturbance online. The adaptive sliding mode controller is designed by using the backstepping method, and the disturbance observation error is compensated dynamically by using the adaptive law to reduce the switching gain of the sliding mode controller. This design method relaxes the priori requirement of the sliding mode switching gain to the upper bound of the system uncertainty. The influence of external disturbance and system uncertainty on the lateral roll displacement tracking performance is reduced. At the same time, the stability of the side roll displacement tracking closed-loop control system is proved by using the Lyapunov method. The control strategy is robust to the uncertainty of the system, especially the load change, and can meet the requirements of rapid and accurate tracking of the lateral roll displacement.
【作者单位】：太原科技大学金属材料成形理论与技术山西省重点实验室;
【基金】：山西省煤机重点科技攻关(MJ2014-07) 山西省高校科技创新基金(2015171)资助项目
【分类号】：TG305;TP273

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