工艺与制造英文2020被引 10
自动铺纤中被动舞动辊张力控制系统建模
Modeling of Tension Control System with Passive Dancer Roll for Automated Fiber Placement
Yi Liu, Qiang Fang, An Li · Zhejiang University
摘要整理
自动铺纤过程中纤维预浸料的张力需保持恒定。纤维铺放末端执行器在复杂飞机面板模具表面运动速度变化剧烈，严重影响张力控制精度。本文提出了主动控制与被动控制相结合的张力控制策略。放纤电机直接控制纤维张力，设计的被动舞动辊作为张力扰动衰减装置，实现对低频速度变化的实时补偿。建立了包含被动舞动辊动力学特性的张力控制系统非线性模型，分析了舞动辊参数对扰动衰减性能的影响。采用H∞混合灵敏度方法设计控制器。在自动铺纤（AFP）机上稳定铺放速度下，获得约2%的张力控制精度；实验表明在最大加速度4 m/s²条件下，张力波动不超过1 N。该研究为复杂曲面自动铺纤中的张力稳定性提供了有效的技术方案，对提高复合材料铺层质量具有重要意义。
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