Nonlinear PI controller for injection speed

Ma'moun Abu-Ayyad, Jose Mauricio Hernandez, Rickey Dubay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, a nonlinear Proportional-Integral (NPI) controller is presented for controlling the injection speed of a 150 tonne injection molding machine. The delayed feedback was compensated by using a Smith Predictor which obtains the future state of the output for control. The process gain and time constant vary during closedloop control because of the nonlinear characteristics of the system. The system is approximated as a first order plus dead time model. In this control approach, the NPI parameters are retuned every sampling instant using the nonlinear variables of the process. The control performance of the proposed method is compared to a PI controller with improved results.

Original languageEnglish (US)
Title of host publicationSociety of Plastics Engineers - 66th Annual Technical Conference of the Society of Plastics Engineers, Plastics Encounter at ANTEC 2008
Pages2182-2185
Number of pages4
StatePublished - Sep 29 2008
Event66th Annual Technical Conference of the Society of Plastics Engineers, Plastics Encounter at ANTEC 2008 - Milwaukee, WI, United States
Duration: May 4 2008May 8 2008

Publication series

NameTechnical Papers, Regional Technical Conference - Society of Plastics Engineers
Volume4

Other

Other66th Annual Technical Conference of the Society of Plastics Engineers, Plastics Encounter at ANTEC 2008
CountryUnited States
CityMilwaukee, WI
Period5/4/085/8/08

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Materials Chemistry
  • Polymers and Plastics

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  • Cite this

    Abu-Ayyad, M., Hernandez, J. M., & Dubay, R. (2008). Nonlinear PI controller for injection speed. In Society of Plastics Engineers - 66th Annual Technical Conference of the Society of Plastics Engineers, Plastics Encounter at ANTEC 2008 (pp. 2182-2185). (Technical Papers, Regional Technical Conference - Society of Plastics Engineers; Vol. 4).