摘要
滴丸机定型杯石蜡油液位控制系统是一个存在非线性、参数时变性和耦合性的复杂系统.通过分析建立了该液位系统的数学模型,并且将自适应控制、模糊控制和PID控制结合起来,提出了一种模型参考模糊自适应PID控制方法.该方法无需辨识被控对象参数,实时性好,便于在线控制.仿真结果表明,该方法具有较好的动态品质和调节精度,以及很强的鲁棒性,即使当被控对象参数摄动20%时,依然可以获得理想的控制效果.现场运行实验结果也表明了该方法的有效性.
The paraffin oil level control system in capsule forming machine is a nonlinear, time-variant and coupling system. The mathematical model of the level control system was established. And a new model reference fuzzy adaptive PID （MRFA-PID） control method was proposed by combining the adaptive control, fuzzy control and PID control techniques. Without need to identify the parameters of the controlled plant, the proposed method has a good real-time performance, and is easy to be implemented on line. Simulation results show that the proposed method is efficient to design a robust paraffin oil level control system for capsule forming machine with good dynamic character and high regulation precision. Even though the parameters＇ perturbation reaches 20%, the closed-loop system still has satisfied dynamic performance.The effectiveness of the proposed method is also verified by physical experiment.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2008年第8期931-936,共6页
Journal of Tianjin University(Science and Technology)
基金
厦门市科技计划资助项目(3502Z2006008)
