Run by run control of time-pressure dispensing for electronics encapsulation

• Published in: International journal of automation and computing Vol. 5; no. 4; pp. 419 - 424
• Main Authors: Chen, Cong-Ping, Ding, Han
• Format: Journal Article
• Language: English
• Published: Heidelberg Institute of Automation, Chinese Academy of Sciences 01.10.2008; Springer Nature B.V; College of Mechanical & Materials Engineering, China Three Gorge University, Yichang 443002, PRC%School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PRC
• Subjects: CAE) and Design; Compressibility; Computer Applications; Computer-Aided Engineering (CAD; Consistency; Control; Control systems; Dispensing; Electronics; Encapsulation; Engineering; Mathematical models; Mechatronics; Prediction models; Robotics; Strategy; Supervisory control; Syringes; electronics encapsulation; Time-pressure dispensing; predictive model; run by run (RbR) control
• ISSN: 1476-8186; 2153-182X; 1751-8520; 2153-1838
• DOI: 10.1007/s11633-008-0419-y

To alleviate the influence of gas compressibility on the process performance of time-pressure dispensing for electronics encapsulation, a predictive model is developed based on power-law fluid to estimate the encapsulant amount dispensed. Based on the simple and effective model, a run by run (RbR) supervisory control scheme is delivered to compensate the variation resulting from gas volume change in the syringe. Both simulation and experiment have shown that the dispensing consistency has been greatly improved with the model-based RbR control strategy developed in this paper.