基于NNDO滑模反步法的中密度纤维板板厚控制研究

摘要

针对中密度纤维板板厚纠偏位置伺服系统存在参数的不确定性以及系统外部的干扰等因素引起的板厚偏差问题，提出了一种基于NNDO的滑模反步控制方法。结果表明：加入NNDO的滑模反步控制可以实现对位置信号的快速跟踪，跟踪误差的收敛速度也更快，减弱了滑模反步控制器的控制输入抖振问题，改善了闭环系统的动态性能和对于干扰的鲁棒性，提高了控制器的控制性能。%Adaptive back-stepping sliding mode control strategy-based controller with neural network disturb-ance observer ( NNDO) is proposed for positioning servo system of slab thickness deviation rectification of medium density fiberboard which contains nonlinear factors, such as parameters uncertainty, interference from externality, etc. to solve rectification of slab thickness. The results show the effectiveness of NNDO-based back-stepping sliding mode control method in terms of improving position tracking and convergence rate of tracking error, reducing the chattering of control input, and improving the dynamic performance of closed-loop system and composite interference robustness. The control performance of the controller was increased.