A multi-segment injection line and real-time adaptive, model-based controller for vacuum assisted resin transfer molding
A multi-segment injection line and real-time adaptive, model-based controller for vacuum assisted resin transfer molding
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DOI：
10.1016/j.compositesa.2006.06.021
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发表时间：
2007-01-01
影响因子：
8.7
通讯作者：
Lelievre, Benoit
中科院分区：
文献类型：
--
作者：
Nalla, Ajit R.;Fuqua, Michael;Lelievre, Benoit
为了提高VARTM过程的可控性，开发了一种新的树脂注射线。注射线由多个独立操作的部分组成，可将树脂输送到模具内的不同位置。模拟不同的注射线配置不同的模具几何形状的研究和验证实验室规模的模具，用于展示这种方法的潜在价值和好处。已经设计了基于计算机的闭环控制器策略，其在注射期间使用模具内的树脂位置的点传感器反馈来操作分段的注射线。除了一个简单的闭环控制算法，自适应控制器的开发，使用有限元模型来模拟填充特性在真实的时间和配置分段注射线，以尽量减少干燥，未填充的模具内的区域。仿真和实验与VARTM模具含有大的渗透率变化表明，模具填充显着改善与闭环控制相比，开环响应与传统的注射线。(c)2006爱思唯尔有限公司保留所有权利。
To improve process controllability during VARTM, a new resin injection line was developed. The injection line, which consists of multiple segments each independently operated, allows for the delivery of resin to different locations within the mold. Simulation of different injection line configurations for various mold geometries is studied and validated with laboratory size molds used to demonstrate the potential value and benefits of this approach. Computer-based, closed-loop controller strategies have been designed that use point sensor feedback of resin location within the mold during injection to operate the segmented injection line. In addition to a simple closed-loop control algorithm, an adaptive controller was developed that uses a finite element model to simulate filling characteristics in real time and configure the segmented injection line to minimize dry, unfilled regions within the mold. Simulations and experiments with VARTM molds containing large permeability variations revealed that mold filling was significantly improved with closed-loop control compared to the open-loop response with a conventional injection line. (c) 2006 Elsevier Ltd. All rights reserved.