Injection velocity control of thermoplastic injection molding via a double controller scheme
Data(s) |
01/09/1999
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Resumo |
Injection velocity has been recognized as a key variable in thermoplastic injection molding. Its closed-loop control is, however, difficult due to the complexity of the process dynamic characteristics. The basic requirements of the control system include tracking of a pre-determined injection velocity curve defined in a profile, load rejection and robustness. It is difficult for a conventional control scheme to meet all these requirements. Injection velocity dynamics are first analyzed in this paper. Then a novel double-controller scheme is adopted for the injection velocity control. This scheme allows an independent design of set-point tracking and load rejection and has good system robustness. The implementation of the double-controller scheme for injection velocity control is discussed. Special techniques such as profile transformation and shifting are also introduced to improve the velocity responses. The proposed velocity control has been experimentally demonstrated to be effective for a wide range of processing conditions. |
Formato |
application/pdf |
Identificador | |
Publicador |
American Chemical Society |
Relação |
http://eprints.qut.edu.au/79599/1/hk13revs_withPubInfo.pdf DOI:10.1021/ie980535p Tian, Yu-Chu & Gao, Furong (1999) Injection velocity control of thermoplastic injection molding via a double controller scheme. Industrial and Engineering Chemistry Research, 38(9), pp. 3396-3406. |
Direitos |
Copyright 1999 American Chemical Society. |
Fonte |
School of Electrical Engineering & Computer Science; Science & Engineering Faculty |
Palavras-Chave | #010204 Dynamical Systems in Applications #090407 Process Control and Simulation #Process control #injection modeling #double-controller #process dynamics |
Tipo |
Journal Article |