摘要
调节阀具有大滞后特性,且进气和排气过程的静摩擦力不同。针对上述控制难点,设计了非对称一维模糊控制算法的阀门定位器,根据给定电压与阀位反馈电压的偏差符号,判断执行进气或排气动作。模糊控制器采用两段式量化因子和比例因子及非均匀性划分的模糊子集;以偏差值作为输入信号,输出信号是PWM波的占空比值。基于dSPACE实时仿真系统实现智能阀门定位器,实验结果表明:阀门在不同起始阀位处,都能够快速无超调的响应不同幅度的给定输入信号。
Regulating valve has large time delay characteristic,and its static friction of drawing in air and drawing out air is different.In view of the said difficulties,an asymmetric one-dimensional fuzzy controller for intelligent valve positioner was designed.According to deviation sign of setting voltage and valve feedback voltage,controller can judge to drawing in or drawing out air.Fuzzy controller adopted two-step quantization factor and scale factor,and division method of its fuzzy subset was heterogeneity.Input signal of fuzzy controller was deviation and its output signal was duty ration of PWM.Intelligent valve positioner was realized based on dSPACE real time simulation system.Experimental results showed that regulating valve can also had rapid and non-overshoot response capabilities at different starting position,even if amplitude of setting input signal was different.
出处
《自动化与仪器仪表》
2012年第1期57-59,共3页
Automation & Instrumentation
基金
"安徽大学2010年青年骨干教师基金
安徽大学博士启动基金
安徽大学青年研究基金"资助
