虚拟仿真实验作为物理实验的有效补充,在专业教育过程中起着非常重要的作用。气动锤铆是飞机装配的主要连接工艺之一,开展气动锤铆物理实验具有场地需求大、实验材料价格高、技能水平要求高、干涉量测量复杂等问题。采用信息化手段开展...虚拟仿真实验作为物理实验的有效补充,在专业教育过程中起着非常重要的作用。气动锤铆是飞机装配的主要连接工艺之一,开展气动锤铆物理实验具有场地需求大、实验材料价格高、技能水平要求高、干涉量测量复杂等问题。采用信息化手段开展虚拟仿真实验,通过三维虚拟仿真的形式,将大型飞机铝合金构件的锤铆连接过程真实展现在学生面前,使学生在大型飞机虚拟装配环境中进行锤铆工艺系统软硬件搭建、锤铆工艺参数选择、锤铆工艺装备选择和铆接接头质量检测等仿真实验操作和理论学习,帮助学生架构面向高端复杂产品智能制造的机械设计制造及其自动化专业知识体系架构。Virtual simulation experiment, as an effective supplement to physical experiments, plays a very important role in professional education. Pneumatic percussive riveting is one of the main connection processes in aircraft assembly. Conducting physical experiments on pneumatic percussive riveting has issues such as high site requirements, high material prices, high skill requirements, and complex interference measurement. Using information technology to conduct virtual simulation experiments, the percussiveriveting process of large aircraft aluminum alloy components is realistically presented to students in the form of 3D virtual simulation. This enables students to conduct simulation experiments and theoretical learning in the virtual assembly environment of large aircraft, such as software and hardware construction of percussiveriveting systems, selection of riveting parameters, selection of riveting equipment, and quality inspection of riveted joints. It helps students construct a professional knowledge system architecture for mechanical design, manufacturing, and automation for intelligent manufacturing of complex products.展开更多
文摘晶圆良率是衡量半导体制造系统加工能力的关键指标,对其精准预测有利于排查晶圆制程工艺缺陷、提高晶圆生产率、控制企业生产成本。基于晶圆允收测试(wafer acceptance test,WAT)大数据,提出了基于卷积神经网络和长短期记忆网络(convolutional neural networks and long short-term memory,CNN-LSTM)的晶圆良率预测方法。该方法对WAT数据进行缺失、异常与归一化预处理;构建CNN模型对复杂WAT参数的关键特征进行识别;考虑相邻晶圆间的时序相关性,设计长短期记忆网络进行回归分析,从而实现晶圆良率的准确预测。以某工厂晶圆允收测试过程中采集的实际生产数据进行实验,并与其他传统晶圆良率预测方法的结果进行对比分析,从而验证所提方法的有效性。
文摘虚拟仿真实验作为物理实验的有效补充,在专业教育过程中起着非常重要的作用。气动锤铆是飞机装配的主要连接工艺之一,开展气动锤铆物理实验具有场地需求大、实验材料价格高、技能水平要求高、干涉量测量复杂等问题。采用信息化手段开展虚拟仿真实验,通过三维虚拟仿真的形式,将大型飞机铝合金构件的锤铆连接过程真实展现在学生面前,使学生在大型飞机虚拟装配环境中进行锤铆工艺系统软硬件搭建、锤铆工艺参数选择、锤铆工艺装备选择和铆接接头质量检测等仿真实验操作和理论学习,帮助学生架构面向高端复杂产品智能制造的机械设计制造及其自动化专业知识体系架构。Virtual simulation experiment, as an effective supplement to physical experiments, plays a very important role in professional education. Pneumatic percussive riveting is one of the main connection processes in aircraft assembly. Conducting physical experiments on pneumatic percussive riveting has issues such as high site requirements, high material prices, high skill requirements, and complex interference measurement. Using information technology to conduct virtual simulation experiments, the percussiveriveting process of large aircraft aluminum alloy components is realistically presented to students in the form of 3D virtual simulation. This enables students to conduct simulation experiments and theoretical learning in the virtual assembly environment of large aircraft, such as software and hardware construction of percussiveriveting systems, selection of riveting parameters, selection of riveting equipment, and quality inspection of riveted joints. It helps students construct a professional knowledge system architecture for mechanical design, manufacturing, and automation for intelligent manufacturing of complex products.
