Active control of the vacuum infusion process
Active control of the vacuum infusion process
复制标题
DOI：
10.1016/j.compositesa.2006.11.012
复制
发表时间：
2007-01-01
影响因子：
8.7
通讯作者：
Robitaille, Francois
中科院分区：
文献类型：
--
作者：
Modi, Dhiren;Correia, Nuno;Robitaille, Francois
通过灌注实验，纤维预制件在渗透率方面显示出固有的不均匀性。这种不均匀性可能导致无法预见、不可预测且可能有问题的流动模式。为解决这一问题，提出了一种新的主动控制系统，该系统能够监测树脂流动，识别流动扰动，并通过计算机控制的注入口实时采取适当的纠正措施。还提出了一种简单的技术，用于监测诸如真空灌注（VI）等闭合模塑工艺中的树脂流动，在这种工艺中模具至少有一面是可见的。该技术使用低成本的网络摄像头在灌注阶段以固定的时间间隔拍摄图像，并对其进行分析以识别流动扰动。然后控制系统利用这些信息实时采取纠正措施。为证明该系统的潜力，已通过数值模拟和灌注实验对其进行了实施和验证。© 2006爱思唯尔有限公司。保留所有权利。
Through infusion experiments, fibrous preforms are shown to have an inherent heterogeneity in the permeability. This heterogeneity can lead to unforeseen, unpredictable and potentially, problematic flow patterns. A new active control system is proposed to address this issue, capable of monitoring the resin flow, identifying flow disturbances and taking an appropriate corrective action in real-time, through computer-controlled injection ports. A simple technique is also proposed for monitoring the resin flow in closed moulding processes such as Vacuum Infusion (VI), where at least one side of the mould is visible. This uses a low cost web-camera to capture images at fixed time intervals during the infusion phase and analyses them to identify flow disturbances. The control system then uses this information to take corrective action in real-time. To demonstrate the potential of the system, it has been implemented and validated through numerical simulations and infusion experiments. (c) 2006 Elsevier Ltd. All rights reserved.