闪光焊机的移动控制策略与仿真分析

Traveling control for flying-type flash-butt welder and its simulating analysis

关键词:  闪光焊机  虚拟样机  复合控制  人工免疫调节机制

Key words:  flash-butt welder  virtual prototype  composite control  artificial immune adjusting law

摘要:

为了在实物样机制作前对焊机移动控制策略进行研究,建立了无头轧制系统及移动式闪光焊机的虚拟样机,根据系统对移动焊机的作业要求,采用了速度和位移分段控制方案;为了保证焊机前进行程中的同步跟踪性能、减小焊机与轧制坯间的机械耦合、提高焊机的抗干扰能力,提出了基于人工免疫调整机制的单神经元复合控制策略。仿真分析表明,速度和位移分段控制保证了焊机前进行程的速度和返回行程的位移要求,单神经元复合控制可以有效地提高焊机对轧制坯的同步跟踪精度,人工免疫反馈机制可显著增强焊机的抗干扰能力。

Abstract:

In order to optimize the control for flying-type flash-butt welder in an EBROS (endless-bar rolling system)before its physical prototype was made, a virtual prototype for the welder had been established.According to welder's working characteristics in the system, a control plan had been used that welder's moving velocity and its displacement were controlled in subsection.In order to improve the performance for welder running after rolled-billet in its forward travel, reduce mechanical couplings between welder and rolled-billet, and strengthen welder's capability of withstanding disturbances from outside, a composite controller of single nerve-cell based on an artificial immune adjusting law had been applied.Simulating results show that subsection control for the welder can meet its requirements of velocity in forward travel and its requirements of displacement in return travel, a composite controller of single nerve-cell can effectively increase synchronous-precision of welder tracking rolled-billet, and the introduction of an artificial immune adjusting law in the welder driving system can obviously enhance the property of welder resisting outside disturbances.