Adaptive decoupling predictive temperature control for an extrusionbarrel in a plastic injection molding process
Chi-Huang Lu
Ching-Chih Tsai
Dept. of Electr. Eng., Hsiuping Inst. of Technol., Taichung;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct 2001
Volume: 48,
Issue: 5
On page(s): 968-975
ISSN: 0278-0046
References Cited: 13
CODEN: ITIED6
INSPEC Accession Number: 7070157
Digital Object Identifier: 10.1109/41.954561
Current Version Published: 2002-08-07
Abstract
This paper presents an adaptive decoupling temperature control for
an extrusion barrel in a plastic injection molding process. After
establishing a stochastic polynomial matrix model of the system, a
corresponding decoupling system representation was then developed. The
decoupling control design was derived based on the minimization of a
generalized predictive performance criterion. The set-point tracking,
disturbance rejection, and robustness capabilities of the proposed
method can be improved by appropriate adjustments to the tuning
parameters in the criterion function. A real-time control algorithm,
including the recursive least-squares method, is proposed which was
implemented using a digital signal processor TMS320C31 from Texas
Instruments. Through the experimental results, the proposed method has
been shown to be powerful under set-point changes, load disturbances,
and significant plant uncertainties. The proposed control law is shown
to be less computational and more effective than other well-known
multivariable control strategies, and more powerful than single-loop
temperature-zone control policies
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