模糊自适应内模控制在电加热锅炉温度控制中的应用研究

Study of the Application of the Fuzzy Self-adaptive Inner Model-based Control in the Temperature Control of an Electrically-heated Boiler

针对电加热锅炉夹套温度控制具有的非线性、滞后性、易受扰动等特点,在JX-300X DCS系统设计出模糊自适应内模控制控制方法。通过建立内部模型,利用模糊规则在线调整内模控制器中滤波器时间常数Tf。采用SCX语言进行模糊自适应内模控制算法的编程设计,在DCS的平台上进行控制试验。试验结果表明,模糊自适应内模控制比常规PID控制的控制性能有很大提高,响应迅速,超调接近为零,调节时间短,稳定精度高,抗干扰能力及鲁棒性强。

In the light of such specific features of the temperature control in the clamping sleeve of an electrically-heated boiler as non-linear,time lagging and disturbance-susceptible etc.,presented was a fuzzy self-adaptive inner model-based control method in the JX-300X DCS system.Through establishing an inner model,the fuzzy principles were utilized to make an on-line adjustment of the time constant Tf of the filter inside the inner model controller.The SCX language was adopted to design a program by using the fuzzy self-adaptive inner model-based control algorithm and a control test was conducted on a DCS（distributed control system） platform.The test results show that the performance of the fuzzy self-adaptive inner model-based control is enhanced greatly when compared with the conventional PID（proportional,integral and differntial） control,featuring a quick response,a near-to-zero overshoot,a short regulation time duration,a high stabilization precision,a strong distrubance-resistant capacity and robustness.