摘要
恒压供水系统的传统控制方法为压力传感器实时监测管网压力,将监测值与设定压力值比较得出压力误差,再借助固定参数直接调控泵的频率,以改变供水量。然而,这种方法忽略了供水系统的强非线性特性,会导致控制稳定性较差。为此,开展基于泵阀协同的恒压供水系统比例-积分-微分(Proportion Integration Differentiation,PID)控制研究:以泵和阀门为控制执行器,分别建立其流量输出的传递函数模型。控制器输入压力与实际压力的误差及其变化率这两个状态变量,经预设模糊规则库和解模糊化处理生成精确参数修正量,实时更新控制器参数,以匹配系统特性;计算总控制量,按系统效率优先原则分解泵频率和阀门开度增量,实现压力稳定与能耗优化。实验表明,采用该方法时,管道出水压强波动稳定在0.28~0.35 MPa,控制效果理想。
The traditional control method for constant pressure water supply systems is to use pressure sensors to monitor the pressure of the pipeline network in real time,compare the monitored value with the set pressure value to obtain the pressure error,and then directly adjust the frequency of the pump with fixed parameters to change the water supply volume.However,this method ignores the strong nonlinear characteristics of the water supply system,which can lead to poor control stability.To this end,research is being conducted on Proportion Integration Differentiation(PID)control of a constant pressure water supply system based on pump valve collaboration:transfer function models of flow output are established for the pump and valve as control actuators,respectively.The two state variables of the error and rate of change between the input pressure and the actual pressure of the controller are processed through a preset fuzzy rule library and defuzzification to generate accurate parameter correction quantities,and the controller parameters are updated in real time to match the system characteristics;calculate the total control quantity,decompose the pump frequency and valve opening increment according to the principle of system efficiency priority,and achieve pressure stability and energy consumption optimization.The experiment shows that when using this method,the fluctuation of pipeline outlet pressure is stable at 0.28~0.35 MPa,and the control effect is ideal.
作者
张航
ZHANG Hang(Qingdao Beer(Rizhao)Co.,Ltd.,Rizhao 276800)
出处
《现代制造技术与装备》
2025年第12期192-195,共4页
Modern Manufacturing Technology and Equipment
关键词
泵阀协同
恒压供水系统
比例-积分-微分(PID)控制
pump-valve coordination
constant-pressure water supply system
Proportion Integration Differentiation(PID)control
