摘要
针对现有液位调控系统中双回路PID参数调节困难的问题,通过将继电反馈作为支撑PID参数自整定方法,设计了一套基于MCGS和PLC的液位调控系统用串级PID参数自整定控制策略。通过分析储油罐阶跃响应得到传递函数,在此基础上对控制对象进行离散化并建立了PID参数自整定控制系统,在MCGS平台成功实验了实时监控。比较自整定前后的控制性能,得到PID参数自整定具有较快的响应速度,较小的超调量、更快达到稳态、更强的抗干扰能力等优点,可以实现对储油罐系统液位的最佳控制。仿真结果表明PID参数自整定控制技术能够有效地调节储油罐系统的液位控制,极大地保证输油系统的安全。
Since the PID parameters of dual-loop circuit in the existing liquid-level control system are difficult to adjust, a liquid-level regulation and control system based on MCGS and PLC was designed by taking the relay feedback to support PID pa- rameters self-tuning control strategy, and takes cascade PID parameters self-turning as the control strategy. The transfer function is obtained by analysis of the step response of the oil storage tank. On this basis, the controlled member is discretized to estab- lish the PID parameters self-tuning control system, and monitored in real-time on MCGS platform successfully. The control per- formances before and after self-tuning are compared, it is found that the PID parameters self-tuning has the advantages of faster response speed, smaller overshoot and stronger anti-interference ability. The optimum control to the liquid-level of the oil storage tank system is realized. The simulation results show that the PID parameters self-tuning control technology can effectively control the liquid level of the oil storage tank system, and greatly ensure the safety of oil transportation system.
出处
《现代电子技术》
北大核心
2016年第5期152-154,160,共4页
Modern Electronics Technique
关键词
液位
串级控制
PID参数
自整定
liquid level
cascade control
PID parameters
self-tuning
