摘要
针对中央空调机组的恒压供水问题提出了一种基于模糊PID控制器在线调整PID参数的变频水泵恒压供水系统.讨论了如何确定模糊PID控制器的隶属函数和模糊规则的问题,利用MATLAB软件中的模糊控制工具箱和Simulink对系统进行了仿真实验,并对常规PID控制器和模糊PID控制器分别选取了两组不同的系统传递函数,模糊PID控制器通过输出调整量ΔKp、ΔKi、ΔKd,对PID的参数Kp、Ki、Kd进行了在线调整.仿真实验结果表明模糊PID控制器不仅能有效抑制超调现象,提高系统的响应速度和稳态性能,而且对系统结构参数变化的适应能力也更强.
In order to solve the problem of constant pressure water-supplying of central air conditioner, a variable frequency pump constant pressure water-supplying system based on fuzzy PID is proposed, The problem of how to determine the membership functions and fuzzy rules of fuzzy PID controller is defined. Simulation experiment by means of fuzzy control toolbox and Simulink in MATLAB is implemented by selecting two different system transfer functions for conventional PID controller and fuzzy PID controller. Fuzzy PID controller adjusts PID parameters Kp、Ki、Kd online by outputting adjustment △Kp、△Ki、△Kd. Simulation results show that the Fuzzy PID controller has better performance in restricting the overshoot, improving response speed and steady state performance, and the ability to adapt to the changes of the system structure parameters is also stronger.
出处
《五邑大学学报（自然科学版）》
CAS
2013年第1期59-63,共5页
Journal of Wuyi University(Natural Science Edition)
关键词
模糊PID
变频水泵
恒压供水
fuzzy PID
variable frequency pump
constant pressure water-supply
