Application of knowledge-based vision to closed-loop control of the injection molding process

1997 ◽  
Author(s):  
Robert Marsh ◽  
R. J. Stamp ◽  
T. M. Hill
Keyword(s):  
Injection Molding ◽  
Closed Loop ◽  
Injection Molding Process ◽  
Closed Loop Control ◽  
Molding Process ◽  
Loop Control ◽  
Knowledge Based

Solidification sensing for closed loop control of injection molding hold time

1996 ◽  
Vol 15 (2) ◽  
pp. 151-163 ◽  
Author(s):  
Charles L. Thomas ◽  
Ampere A. Tseng ◽  
Anthony J. Bur ◽  
Joseph L. Rose
Keyword(s):  
Injection Molding ◽  
Closed Loop ◽  
Hold Time ◽  
Closed Loop Control ◽  
Loop Control

Solidification sensing for closed loop control of injection molding hold time

1996 ◽  
Vol 15 (2) ◽  
pp. 151-163 ◽  
Author(s):  
Charles L. Thomas ◽  
Ampere A. Tseng ◽  
Anthony J. Bur ◽  
Joseph L. Rose
Keyword(s):  
Injection Molding ◽  
Closed Loop ◽  
Hold Time ◽  
Closed Loop Control ◽  
Loop Control

Proportional Pressure Control of Water Hydraulic System for Water-Assisted Injection Molding: Modeling and Simulation

2008 ◽  
Author(s):  
Zengmeng Zhang ◽  
Hua Zhou
Keyword(s):  
Injection Molding ◽  
Modeling And Simulation ◽  
Hydraulic System ◽  
Closed Loop ◽  
Injection Pressure ◽  
Pressure Control ◽  
Closed Loop Control ◽  
Load Characteristic ◽  
Loop Control ◽  
Water Hydraulic

The proportional pressure control of water hydraulic system for water-assisted injection molding (WAIM) is investigated through modeling and simulation. WAIM is an innovative process to mold plastic parts with hollow sections. A water hydraulic system is designed for WAIM and a differential pressure control strategy is provided to regulate the water injection pressure by a proportional relief valve. An accumulator and a pressure cylinder are applied in the system and modeled in MATLAB. The load characteristic is analyzed and the coupling relationship between load pressure and flow rate is approximately simulated. Based on the variable-parameter model with linearization, open-loop and closed-loop control with multi-point feedback are investigated. Integral compensation and PI control are used with slope control of injection pressure. In addition, the influence of load characteristic is also investigated. Results of the simulation show that the closed-loop control contributes to the stability and disturbance resistance performance under various load characteristics.

The Impact of Visual Feedback Type on the Mastery of Visuo-Motor Transformations

2012 ◽  
Vol 220 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Sandra Sülzenbrück
Keyword(s):  
Empirical Research ◽  
Visual Feedback ◽  
Closed Loop ◽  
Motor Planning ◽  
Visual Input ◽  
Closed Loop Control ◽  
Loop Control ◽  
Feedback Type ◽  
Effective Use ◽  
The Impact

For the effective use of modern tools, the inherent visuo-motor transformation needs to be mastered. The successful adjustment to and learning of these transformations crucially depends on practice conditions, particularly on the type of visual feedback during practice. Here, a review about empirical research exploring the influence of continuous and terminal visual feedback during practice on the mastery of visuo-motor transformations is provided. Two studies investigating the impact of the type of visual feedback on either direction-dependent visuo-motor gains or the complex visuo-motor transformation of a virtual two-sided lever are presented in more detail. The findings of these studies indicate that the continuous availability of visual feedback supports performance when closed-loop control is possible, but impairs performance when visual input is no longer available. Different approaches to explain these performance differences due to the type of visual feedback during practice are considered. For example, these differences could reflect a process of re-optimization of motor planning in a novel environment or represent effects of the specificity of practice. Furthermore, differences in the allocation of attention during movements with terminal and continuous visual feedback could account for the observed differences.

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