润滑油蒸发损失测定仪温度复合控制方法  

A composite temperature control method for evaporation loss tester of lubricating oil

作　　者：肖克 吴双双 柏文琦 林海军[2] 叶源 XIAO Ke;WU Shuangshuang;BAI Wenqi;LIN Haijun;YE Yuan(Hunan Institute of Metrology and Test,Changsha 410014,China;Hunan Normal University,Changsha 410081,China)

机构地区：[1]湖南省计量检测研究院,湖南长沙410014 [2]湖南师范大学,湖南长沙410081

出　　处：《中国测试》2023年第1期155-160,共6页China Measurement & Test

基　　金：国家重点研发计划项目(2019YFF0216804);湖南省市场监督管理局科技计划项目(2020KJJH08);长沙市杰出创新青年培养计划(kq2009090)。

摘　　要：针对润滑油蒸发损失测定仪电热炉系统温度的非线性、大滞后性以及难以建模等问题,以电热炉内部实测温度与目标控制温度之间偏差的绝对值|e|、温度阈值M1、M2的大小为决策变量,设计一种粗大偏差采用Bang-Bang控制、中等偏差采用模糊控制、细小偏差采用PID控制的分段式复合温度控制方法,同时给出基于该方法的温度控制系统的软、硬件设计。实验结果表明:采用该文设计的复合温度控制方法,润滑油蒸发损失测定仪的电热炉温度能够在35 min内达到目标值245℃,且控制误差≤0.2℃,具有良好的动、静态性能和抗干扰能力。Aiming at the problems of nonlinearity,large lag and difficulty in modeling of electric furnace system temperature of lubricating oil evaporation loss tester,combined with the absolute value |e| of deviation between measured temperature and target control temperature in electric furnace,temperature threshold M1 and M2,a new method of using bang bang control for coarse deviation,fuzzy control for medium deviation is designed,and the subsection compound temperature control method of PID control is adopted for small deviation.The software and hardware design of the temperature control system based on this method are given.The experimental results show that,with the composite temperature control method designed in this paper,the electric furnace temperature of the lubricating oil evaporation loss tester can reach the target value of 245 ℃within 35 minutes,and the control error is less than 0.2 ℃,which has good dynamic and static performance and anti-jamming capability.

关 键 词：润滑油蒸发损失测定仪 BANG-BANG控制 模糊控制 PID控制 

分 类 号：TB9[一般工业技术—计量学] TP211[机械工程—测试计量技术及仪器]