Design and parameter optimization method of compaction admittance controller for automated fiber placement
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摘要:
铺放压实力是连续纤维复合材料结构自动铺放成型的关键工艺参数之一。由于多数铺丝设备刚性高且位控精度不足,往往容易导致压实力波动较大,严重影响成型质量。因此,面向纤维预浸料自动铺放成型过程中压实力的柔顺控制要求,构建铺丝设备压实机构与成型模具间的二阶等效模型,设计一种基于导纳控制原理的铺放压实力控制器,采用烟花群体智能算法对控制器的惯性参数、阻尼参数及刚度参数进行优化求解,并通过建模仿真与铺放试验验证铺放压实力导纳控制器的有效性。
Abstract:Compaction pressure is one of the crucial manufacturing process parameters of continuous fiber composite structures fabricated by automated fiber placement. Due to the high rigidity and insufficient position control accuracy of most automated fiber placements, compaction pressure fluctuates drastically which results in poor forming quality. In order to satisfy the compliance control requirements of pressure regulation, the second-order equivalent model between the compaction mechanism and the forming mould was constructed, a pressure controller based on admittance control principle was proposed. Further, the inertia parameter, damping parameter and stiffness parameter of the controller were optimized by using fireworks swarm intelligence algorithm, and the effectiveness of the controller was demonstrated by modeling and simulation, and practical layup experiment.
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表 1 烟花算法及优化目标主要参数
Table 1. Main parameters of fireworks algorithm and optimization objective
参数 设定值 烟花阵列数量 50 变量维数 3 惯性参数空间 (0,10) 阻尼参数空间 (100,300) 刚度参数空间 (0,10) 高斯变异火花数量 3 爆炸火花数目常数 5 爆炸半径常数 5 迭代次数 300 ITAE权重ω1 0.01 稳态误差权重ω2 0.1 -
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