气密检测系统的自辨识与控制自整定方法研究  

Research on Automatic System Identification and Self⁃tuning Method of Air⁃tight Detection System

作　　者：董超慧 雷华明[1] 张建忠 吉小军[1] DONG Chao-hui;LEI Hua-ming;ZHANG Jian-zhong;JI Xiao-jun(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Size Test and Control Technology Co.,Ltd.,Shanghai 201611,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海贤日测控科技有限公司,上海201611

出　　处：《仪表技术与传感器》2020年第11期120-126,共7页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(51475306)。

摘　　要：针对采用ARM控制器的测漏仪,设计了一套可针对不同被测对象在线辨识系统参数,进而基于PID算法控制仪器比例阀的快速充气控制方法。通过充气系统阶跃响应进行系统辨识,获得系统数学模型。采用基于算法自动控制的临界比例度法进行PID参数整定,并提出了充气系统的PID参数优化方法。仿真和实验结果表明,系统辨识和参数自整定方法对超调系统和非超调系统均适用,辨识精度较高,控制效果良好,该快速充气方法可有效减少测漏仪的充气时间,提高检测效率。Aiming at the leak detector with ARM controller,a rapid inflation control method based on online system parameter identification and PID algorithm to control the proportional valve of the instrument was designed,which can be applied on different objects.Through the step response of inflation system,the system identification was carried out,and the mathe matical system model was obtained.The PID parameters were tuned by the critical proportion method based on automatic control by the al⁃gorithm,and the PID parameter optimization method of the inflation system was proposed.The simulation and experiment results show that the system identification and parameter self⁃tuning methods are feasible for both overshoot systems and non⁃overshoot systems with high identification accuracy and good PID effect in control.The rapid inflation method can effectively reduce the in⁃flation time of the leak detector and improve the detection efficiency.

关 键 词：快速充气 二阶时滞系统 系统辨识 PID参数整定 ARM控制器 泄漏检测 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]