In the process of construction of large-span spatial structures, there are many control elements, which need to carry on the dual control of internal force and shape. The traditional control method cannot measure the construction deviation completely and accurately, and there is a lag in information feedback. In this paper, spatio-temporal information is integrated into digital twin and a construction error control method is proposed for large-span spatial structures. By analyzing the fusion mechanism of spatio-temporal information and digital twin, a closed-loop control system for structural errors before, during and after construction is formed. Driven by the control architecture, the method of structure simulation analysis and real-time monitoring during construction is proposed, and the functional relationship between cable force and cable length is established. Based on point cloud data, construction error optimization detection method is proposed for structure formation state. The nonlinear relation between elevation change rate and cable force deviation is formed and the control measures of formation state error are obtained. The experimental model of cable truss structure is taken as an example to apply and verify the theoretical method. The construction error control twin platform is formed in the experiment. Driven by the platform, the twinning analysis and real-time monitoring of the construction process are carried out to control the error of the structure formation. The results show that this method integrates spatio-temporal information into digital twin to realize data integration processing. The optimized error detection method can save 30 % time cost and effectively control the construction error within 3 %. The integration of spatio-temporal information and digital twin provides theoretical and algorithm support for the intelligent management and control of large-span spatial structure construction.

中文翻译：

---

基于数字孪生的大跨度空间结构施工误差控制方法


在大跨度空间结构的构建过程中，有许多控制要素，需要进行内力和形的双重控制。传统的控制方法无法完整、准确地测量施工偏差，信息反馈存在滞后性。该文将时空信息集成到数字孪生中，提出了一种大跨度空间结构的构造误差控制方法。通过分析时空信息与数字孪生的融合机制，形成了施工前、施工中、施工后结构误差的闭环控制系统。在控制架构的驱动下，提出了结构仿真分析和施工过程中实时监测的方法，建立了索力与索长之间的函数关系。基于点云数据，提出了结构形成状态的施工误差优化检测方法。建立了高程变化率与索力偏差的非线性关系，得到了地层状态误差的控制措施。以索桁架结构实验模型为例，应用并验证了理论方法。实验中形成了构造误差控制孪生平台。在平台驱动下，对施工过程进行孪生分析和实时监控，以控制结构形成的误差。结果表明，该方法将时空信息集成到数字孪生中，实现数据集成处理。优化的错误检测方法可以节省 30% 的时间成本，并有效将施工误差控制在 3% 以内。 时空信息与数字孪生的融合为大跨度空间结构构建的智能管控提供了理论和算法支持。