Title :
Nonlinear reduced order modeling of plasticization cylinders
Author :
Sadamoto, Tomonori ; Kashima, Kenji ; Morita, Hiroyuki ; Mizuno, Hidenori
Author_Institution :
Dept. of Mech. & Environ. Inf., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
In this paper, we construct a nonlinear reduced order model of a plasticization cylinder of injection machines, which has a spatially distributed nonlinear dynamics. First, a distributed parameter model for the overall control system is derived based on the physical laws. Next, we attempt to reduce the model complexity focusing on the specific structure of the nonlinearity which arises from temperature-dependency of the rate of heat loss of heaters subjected to natural convection. This enables us to obtain a 28-dimensional model (via an 808-dimensional spatially discretized model) while theoretically guaranteeing a practically satisfactory accuracy. The obtained model is examined experimentally by using a prototype system.
Keywords :
computational complexity; distributed parameter systems; heat losses; injection moulding; mass production; nonlinear dynamical systems; plastics industry; reduced order systems; shapes (structures); distributed parameter model; heat loss rate; injection molding machines; mass production; model complexity reduction; nonlinear reduced order modeling; plastic injection molding; plasticization cylinders; spatial distributed nonlinear dynamics; Atmospheric modeling; Heat transfer; Nonlinear systems; Reduced order systems; Temperature measurement; Water heating; Manufacturing systems; Nonlinear systems; Reduced order modeling;
Conference_Titel :
American Control Conference (ACC), 2014
Conference_Location :
Portland, OR
Print_ISBN :
978-1-4799-3272-6
DOI :
10.1109/ACC.2014.6858690
