基于模糊自适应PID的连铸二冷控制系统设计与仿真

Design and Simulation Based on Fuzzy Self-adaptive PID for Secondary Cooling Control System During Continuous Casting

为改善铸坯质量,提高二冷水量的跟踪性和稳定性,将中包温度引入二冷配水,设计出基于配水模型、中包温度、铸坯表面温度及模糊自适应PID的连铸二冷控制系统,并在实验室搭建连铸二冷区喷淋仿真实验系统.在此基础上,分别对常规PID、积分分离PID和模糊自适应PID进行阶跃信号测试和模拟浇注测试.仿真结果表明,模糊自适应PID控制方式在两种测试中的特性要优于其他两种控制方式,这一结果为下一步应用研究打下了良好的基础.

To improve billet quality and the trackability and stability of secondary cooling water during continuous casting, the tundish temperature is introduced into the water distribution for secondary cooling to design the relevant control system, based on the distribution model, tundish temperature, surface temperature and fuzzy self-adaptive PID. A spray cooling system is thus set up for simulation in lab to test the step signal from the conventional, integral separated and fuzzy self-adaptive PID controllers and the simulated casting. The simulation results show that the fuzzy self-adaptive PID controller＇s performance is better than the other two controllers＇, which provides a foundation for further study and application.