基于数字孪生的火箭框环拉弯回弹预测

Springback Prediction of Rocket Frame Ring Based on Digital Twin

针对火箭框环拉弯成形带来的回弹会严重影响框环一次成形的合格率以及航天产品的装配精度,提出基于数字孪生的火箭框环拉弯回弹预测方法。通过构建与框环实际生产流程相互匹配的孪生模型,建立起孪生模型与物理实体模型之间的通信关系,实现孪生模型和物理实体的相互映射,从而利用物理实体的数据不断修改孪生模型。孪生模型经过诊断、预测和评估后,可以将仿真结果输出到控制器对物理实体进行状态控制,从而实现孪生模型与物理实体的一致性。通过对框环加工成形进行实时指导,有效地减少了框环拉弯成形的回弹量,与传统的建模仿真相比,使用数字孪生技术具有设计周期短、产品精度高、可靠性高、生产成本低等优点。

In order to address the problem that the springback brought about by the bending of the rocket frame ring can seriously affect the qualification rate of the frame ring and the assembly accuracy of aerospace products,a digital twinbased rocket frame ring bending springback prediction method is proposed.By constructing a twin model that matches the actual production process of the rocket frame ring,establishing a communication relationship between the twin model and the physical entity model,and realizing the mutual mapping between the twin model and the physical entity,so that the data of the physical entity can be used to continuously modify the twin model.After the twin model has been diagnosed,predicted,and evaluated,the simulation results can be output to the controller for state control of the physical entity,thus achieving consistency between the twin model and the physical entity.The amount of springback in frame ring drawing and forming is effectively reduced by providing real-time guidance on frame ring machining and forming,compared to traditional modeling and simulation,digital twin technology has the advantages of short specific design cycles,high product accuracy,high reliability,and low production costs.