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Zhao Yixiang
School of Mechanical Engineering, Huazhong University of Science
and Technology,
Wuhan 430074, China
Li Hanxiong
Department of Manufacturing Engineering and Engineering
Management,
City University of Hong Kong,
Hong Kong, China
Ding Han
Xiong Youlun
School of Mechanical Engineering, Huazhong University of Science
and Technology,
Wuhan 430074, China
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RUN TO RUN CONTROL OF TIME- PRESSURE DISPENSING SYSTEM*
Abstract: In electronics packaging
the time-pressure dispensing system is widely used to squeeze
the adhesive fluid in a syringe onto boards or substrates with the pressurized air. However, complexity of the process, which includes the air-fluid coupling and the nonlinear uncertainties, makes it difficult
to have a consistent process performance. An integrated dispensing process model is first introduced and then its input-output regression relationship is used to design a run to run control methodology for this process. The controller takes EWMA
scheme and its stability region is given. Experimental results verify the effective-ness of the proposed run to run control method for dispensing process.
Key words:
Electronics packaging Run to run control Dispensing system Process control |