多路纤维铺放控制系统的设计研究

Control system of multiple fiber tows placement

针对目前传统的复合材料成型技术难以保证小曲率半径、凹凸不平等复杂表面构件加工的质量问题,对最新的纤维铺放技术进行了研究,设计了一种基于主流的IPC机+PMACⅡ可编程运动控制器的开放式控制系统,利用VC++6.0搭建了人机交互界面,通过PMACⅡ进行硬件/软件的设计以实现对每一路电动机的速度、位移的控制,进而达到对每一路纤维丝束的独立运动控制及整体的联合运动控制的目的,从而实现了对铺放压力的控制作用。同时还设计了压力反馈系统,以实现对铺放压力的精确控制。研究结果表明,该控制系统能够实时监测铺放过程中的各项参数,并能进行自动/手动操作;不仅能够顺利完成表面形状复杂构件的加工,而且达到铺放压力在30 N范围内误差为±3%的精度,保证了铺放质量。

Aiming at the problem that traditional composites forming technologies were difficult to guarantee the processing quality of complex components such as components with small curvature radius or with concave-convex surface,the latest fiber placement technology was analysed. A control system was designed based on the mainstream open control mode of a PC machine combining with a programmable multi-axis motion controller. VC ＋ ＋ 6.0 was used to build the man-machine interface. Hardware and software were designed to complete speed and displacement control of each motor through PMACⅡ,thus achieving independent movement control of each fiber bundle and overall joint movement control,so as to realize the control of laying pressure. At the same time,a pressure feedback system was designed to realize the accurate pressure control of multiple fiber tows. Research results show that the control system could make real-time monitor of the parameters in the laying process,and perform automatic or manual operation. It not only can smoothly complete surface uneven components laying operations,but also realize that the pressure errors were ± 3% N within the range 30 N,ensuring the quality of laying.