Deep Learning-Based Predictive Control of Injection Velocity in Injection Molding Machines

Abstract

Rapid and reliable optimal control of injection molding machines (IMMs) is critical for the effective production of injection-molded goods, especially in the situation of restricted computer resources of embedded equipment in IMMs. In this paper, an optimal tracking injection velocity control problem arising in a typical IMM is studied. An effective hybrid intelligent control approach with less computing resources for real-time implementation based on the deep learning (DL) method to mimic the classical model predictive control rule is developed to deal with the tracking control of the injection speed. The proposed method utilizes the gated recurrent unit neural network to learn and predict the optimal time series control process data produced by the traditional model predictive controller. The benefits of this approach over the conventional optimization method are illustrated through simulation results, which show that the convergent DL-based controller can effectively avoid the complex calculation in the control process of IMMs and meet the requirements of more robustness and resist environmental uncertainty to a certain level and can be potentially implemented in embedded hardware much more efficiently and conveniently with a smaller memory footprint and faster computation time.

Artificial neural networks for energy demand prediction in an economic MPC-based energy management system

“…On the other hand, an injection rate control problem for optimal tracking is addressed in 21 . The authors develop a hybrid intelligent control approach for the real-time implementation of a gated recurrent unit (GRU) to approximate the control law resulting from a classical MPC.…”

Double Ensemble Technique for Improving the Weight Defect Prediction of Injection Molding in Smart Factories

“…Typically, the injection molding process involves six stages: mold clamping, injection, press holding, plasticization, cooling, and mold opening. Injection molding is crucial in industries like aerospace, defense, electronics, and telecommunications [6].…”

Optimal Robust Tracking Control of Injection Velocity in an Injection Molding Machine

“…The development of related technologies, such as plastic molding, will have a profound impact on the competitiveness of the discrete manufacturing industry in the future and will also have an important radiative impact on the industrial sector. Therefore, the intelligent automation of various IMMs has become a hotspot in the study of discrete industrial manufacturing [9][10][11][12][13][14][15][16][17][18][19]. Recent years have seen a large number of pertinent studies on control and optimization methods for the temperature, pressure, and injection velocity in various IMMs [20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”