GPS-RTK offers direct three-dimensional coordinates measurements for structural health monitoring, but the measurements accuracy and reliability can not meet high building vibration monitoring requirements due to multipath influence, cycle slip, lower sampling rate and other factors. On the other hand, accelerometer offers precise, high sampling rate acceleration observations in structural vibration monitoring. Aiming at making full use of the two kinds of sensors, a Kalman filtering method with integration of GPS and accelerometer was studied, it has multi-rate filtering and robust features. The experimental results showed that this method can effectively improve the accuracy, reliability and sampling rate of high building vibration monitoring.%GPS具有能够直接测量工程结构物监测点三维坐标等优点,但受多路径效应、周跳、采样率等因素的影响,其测量精度与可靠性难以满足高楼振动监测的要求.加速度计能够测量高楼振动时所产生的加速度,具有精度高、采样率高等优点.为充分发挥两种传感器的优点与作用,建立了一种具有多速率滤波以及抗差功能的GPS与加速度计集成的Kalman滤波方法.实验结果表明:该方法可有效提高GPS进行高楼振动监测的精度、采样率及可靠性.
展开▼
