基于自适应卡尔曼滤波法的悬臂施工挠度控制

Deflection Control of Cantilever Construction Based on Adaptive Kalman Filtering

摘要:

挠度是连续刚构桥悬臂施工控制的重要对象，其实测值受多个因素影响。从实测挠度中获悉反映结构受力的真实挠度，对其施工控制具有重要意义。基于改进的自适应卡尔曼滤波算法从挠度实测值中提取出真实信号，预测待浇梁段的挠度变化，并调整施工预拱度，使施工实际状态逼近理论计算轨迹，达到施工监控的目的。通过实际工程的应用，证明该方法具有良好的适用性。

Abstract:

Deflection is an important object controlled in the cantilever construction of continuous rigid-frame bridge. Its measured value is affected by many factors. It is of great significance to obtain the actual deflection of reflecting the structural stress from the measured deflection values in the construction control. Real signals are extracted from the measured deflection values by the improved adaptive Kalman filtering algorithm method to predict the deflection change of girder section to be poured. The construction camber is adjusted to make the actual state of construction approximate the theoretical calculation track and to achieve the construction monitoring. The application of practical engineering proves that this method has the good applicability.