基于加权递推滤波模糊算法的工艺风力控制

Control of centralized-air-supplying based on weighted recursive filter fuzzy algorithm

针对工艺风力控制系统存在的问题,提出了一种新的模糊控制算法。该算法采用离线计算与在线查表结合加权递推平均滤波的方式,运算量小,既具有传统比例-积分-微分(PID)的控制经验的优点,也有模糊控制的自适应性,还能克服输出模糊量变化时控制量的跳变。通过实践证明,该算法具有响应快、超调小、稳态精确度高、抗干扰和自适应能力强等优点,并明显减少了风压和流量的超调量以及调节时间,降低超调量至少1.2%,减少调节时间至少1.3 s,对于工程技术人员如何利用PLC实现高级控制方法具有较好的指导意义。

According to the problems existing in the control of centralized air supplying system,a new fuzzy algorithm is presented in this paper.The algorithm adopts offline computation,online lookup table and the weighted recursive average filter algorithm,which has small computation amount.It bears not only the traditional PID experiences,but also the self-adaptive characteristic of fuzzy control.It can solve the problem of the jumping of control system when the fuzzy output changes.The practice proves that this algorithm offers many advantages including rapid response,small overshoot,high accuracy,and strong ability of anti-jamming and self-adaptation,etc.The undulation and the adjust time of the pressure and flow have been decreased obviously.The undulation has been decreased over 1.2%,and the adjust time has been decreased over 1.3 s.It is useful for realizing senior technique of control with PLC in the field of industry.