作者：肖克¹, 吴双双¹, 柏文琦¹, 林海军², 叶源²

作者单位：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

关键词：润滑油蒸发损失测定仪;Bang-Bang控制;模糊控制;PID控制

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。

A composite temperature control method for evaporation loss tester of lubricating oil
XIAO Ke¹, WU Shuangshuang¹, BAI Wenqi¹, LIN Haijun², YE Yuan²
1. Hunan Institute of Metrology and Test, Changsha 410014, China;
2. Hunan Normal University, Changsha 410081, China
Abstract: 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.
Keywords: lubricating oil evaporation loss tester;Bang-Bang control;fuzzy control;PID control
2023, 49(1):155-160  收稿日期: 2021-08-17;收到修改稿日期: 2021-10-05
基金项目: 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）
作者简介: 肖克(1983-),男,湖南邵阳市人,高级工程师,硕士,研究方向为化工仪器仪表测量与控制
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