纤维铺放设备张力控制系统设计

针对纤维自动铺放设备中纤维张力控制要求和传统张力控制系统存在的问题,设计了重锤式张力控制系统。该系统将重锤作为张力控制缓冲环节,通过控制重锤位置间接控制张力。系统以运动控制器为控制核心,交流伺服电机为执行元件,激光位移传感器为检测元件。采用模糊PID作为重锤位置控制算法,以充分考虑重锤加速度对纤维张力的影响,避免张力波动。样机实验结果表明:该张力控制系统在有效避免铺放过程中的断线、松弛等问题的同时,其纤维张力的静差率和波动率均能满足工程实际要求。

Design of tension control system for fiber placement equipments

Aiming at the tension control requirements of automatic fiber placement equipments and the problems of traditional tension control system, the hammer tension control system is designed. The hammer is used as a buffer unit in the system, and the tension can be indirectly controlled by the position of the hammer. The system adopts the motion controller as the core element of the system, the AC servo motor as the actuator and the laser position sensor as the detector. The fuzzy PID control algorithm is used for the position control of hammer, which can avoid tension fluctuation by full consideration of the acceleration of the hammer. Prototype experimental results show that this system can avoid the problems of disconnection and relaxation of fiber, meanwhile, the static difference ratio and fluctuation ratio can meet the requirements of engineering practice.