Learning control of an electro-hydraulic injection molding machine with smoothed fill-to-pack transition

• Published in: Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334) Vol. 4; pp. 2558 - 2562 vol.4
• Main Authors: Danian Zheng, Alleyne, A.
• Format: Conference Proceeding Journal Article
• Language: English
• Published: IEEE 2000
• Subjects: Buildings; Closed loop systems; Control systems; Current control; Filling; Injection molding; Machine learning; Pressure control; Signal resolution; System testing
• ISBN: 9780780355194; 0780355199
• ISSN: 0743-1619; 2378-5861
• DOI: 10.1109/ACC.2000.878669

A learning control scheme with a bumpless transfer between the filling phase and packing phase is designed and tested on an experimental injection molding machine (IMM). Building upon the learning scheme tested in Havlicsek and Alleyne (1999), the current control system takes into account both of the two learning control phases and initiates a smooth transition between them. A high gain bumpless transfer scheme is described and tested successfully. The experimental results presented show much better performance for the transition between the two learning controllers. Under the current scheme, when the second (packing phase) controller takes over, the IMM system has a significantly smoother control signal and pressure transient than the scheme presented in Havlicsek and Alleyne, (1999). The current scheme partially resolves the problem of the fill-to-pack transition in IMM control.