Household bathroom products are facing the problems of input water temperature fluctuation and effluent temperature control delay, which brings trouble to consumers. This essay will propose a solution that controls the water temperature at the effluent end by adding a water tank and an electrical heater. The author establishes a mathematical model of the water tank and calculates the transfer functions of different parts of the control system. He also chooses a PID controller as the core of the closed-loop system. A feedforward control system is built into the design to reduce the effect of the disturbance. Simulink software is used to conduct the simulation experiment. The result of the simulation shows that the change in heat provided by the heater has the ability to control the temperature of the output water. Additionally, the feedforward control system can reduce the influence of the input water temperature effectively.

中文翻译：

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基于PID控制器和前馈控制的家庭出水温度控制系统设计

家用卫浴产品面临着进水温度波动、出水温控延迟的问题，给消费者带来困扰。本文将提出一种通过添加水箱和电加热器来控制出水端水温的解决方案。作者建立了水箱的数学模型，计算了控制系统各部分的传递函数。他还选择了PID控制器作为闭环系统的核心。设计中内置了前馈控制系统，以减少干扰的影响。采用Simulink软件进行仿真实验。仿真结果表明，加热器提供的热量变化具有控制出水温度的能力。另外，前馈控制系统可以有效降低进水温度的影响。