基于模糊自整定PID的水箱液位控制

Water Tank Level Control Based on Fuzzy Self-tuning PID

水箱液位控制系统具有时滞性、大惯性、不确定性等特点,采用传统的比例积分微分控制器(Proportional-Integral-Derivative,PID)调节难以实现液位的快速、准确调节。因此引入模糊控制理论,利用其自适应学习能力,根据实际情况调节PID控制参数,以更好地适应水箱液位控制系统的参数变化。对水箱液位控制系统进行仿真实验,实验结果表明,模糊自整定PID控制有效减少了系统响应时间和系统超调量,加强了系统的快速响应性和鲁棒性。此外,还通过随机扰动仿真实验验证了模糊自整定PID控制在抵抗干扰方面的有效性。

The liquid level control system of water tank has the characteristics of time delay,large inertia and uncertainty,so it is difficult to adjust the liquid level quickly and accurately by using the traditional Proportional Integral Derivative(PID).Therefore,the fuzzy control theory is introduced and the PID control parameters are adjusted according to the actual situation by using its adaptive learning ability to better adapt to the parameter changes of the water tank level control system.The simulation experiment of the water tank level control system shows that the fuzzy self-tuning PID control can effectively reduce the response time and overshoot of the system,and strengthen the fast response and robustness of the system.In addition,the effectiveness of fuzzy self-tuning PID control in resisting interference is verified by random disturbance simulation.