Integration of GPS and accelerometer for high building vibration monitoring

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.