钻杆焊缝热处理温控系统的建模及实现

Modelling and Implement of Heat-treating Temperature Control of Steel Tube Welding Line

针对钢铁企业某钢管厂的实际情况,采用PI闭环控制实现将钻杆焊缝热处理的稳态温度控制在±2℃的波动范围,以提高产品的生产效率和产品质量。在对原有控制系统分析的基础上,对钻杆焊缝热处理的温度控制系统装置进行实验建模。在不影响控制精度的情况下将模型近似为一阶惯性环节,并根据该模型设计出一个分段的PI控制器,在Matlab上得到了良好的仿真结果。实践表明,该控制器可以成功地对实际生产系统进行有效控制,提高了钢管的生产效率与产品质量,减少了能源消耗,取得了明显的经济效益。

According to the actual production requirements of steel drill pipe and in order to improve production efficiency and quality of products,a temperature control solution is put forward which confines the temperature of steel drill tube successfully to deviation of ±2℃ from the set temperature point.Based on the analysis of the original control system and a series of experiments,the control system is modeled as a first-order inertia unit and utilized to design a multilevel PI controller.The control system achieves good control quality in Matlab simulation.As a result,the real control system accomplished based on the simulation provides satisfying control quality in practice.