模糊-PID控制在气密性检测压力控制系统中的应用  

Application of Fuzzy-PID Control in Air Tightness Detection Pressure Control System

作　　者：江翠翠 王佐勋[1] JIANG Cui-cui;WANG Zuo-xun(School of Electrical Engineering and Automation,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China;Shandong Labor Vocational and Technical College,Jinan 250354,China)

机构地区：[1]齐鲁工业大学(山东省科学院)电气工程与自动化学院,济南250353 [2]山东劳动职业技术学院,济南250354

出　　处：《齐鲁工业大学学报》2021年第3期52-58,共7页Journal of Qilu University of Technology

基　　金：国家自然科学基金(61903207);山东省研究生导师指导能力提升项目(SDYY18151、SDYY17076)。

摘　　要：气密性检测压力控制系统一般具有非线性、滞后、时变性的特点。对于线性系统,PID控制方式具有容易控制、精度高的特点;对于非线性控制系统,模糊控制方式具有鲁棒性好、减小超调量的特点。本文针对气密性检测压力系统设计出一种模糊-PID控制算法来控制系统中待测物体内部压力的波动。在常规PID控制之上加入模糊控制器,模糊控制器采用的是三角函数模糊化、乘积推理规则及重心解模糊化的方式设计,在PID初值上增加在线实时整定的校正量(ΔK_(p)、ΔK_(i)、ΔK_(d)),作为PID控制器的输入参数,提高了气密性检测压力非线性控制系统的动态性能及静态性能。The pressure control system for air tightness detection is generally nonlinear,hysteresis and time varying.For linear control system,conventional PID controller has the advantages of simple control and high precision;for nonlinear control systems,fuzzy control has the advantages of good robustness and reduced overshoot.In this paper,a fuzzy-PID control algorithm is designed to control the internal pressure fluctuation of the object to be measured.Intelligent fuzzy controller is added based on conventional PID control,the fuzzy controller is designed by means of trigonometric function fuzziness,product inference rules and barycenter solution fuzzification,based on the initial value of conventional PID control,the correction amount of on-line real-time setting of fuzzy controller is increased.As the input parameter of PID controller,the dynamic and static performances of the nonlinear control system for detecting air tightness are improved.

关 键 词：气密性检测 压力控制 模糊-PID控制 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]