Phase effect in time-stamped accelerometer measurements - an experimental approach

The phase error in a high quality accelerometer was investigated on the basis of systematic experiments on a prototype platform permitting controlled vertical harmonic oscillations. The recordings of an accelerometer and of an ultra-high frequency GPS fixed on this platform were compared with those of a LVDT transducer, controlling the platform movement. All sensors were supported by independent GPS timing. The output of this study is that the recordings of accelerometers are characterized by a random phase error, which, however, decreases with the increase of the oscillation frequency, as dictated from the laws of mechanics. Such errors are important given the increasing use of combinations of accelerometers with various sensors for a wide range of applications. A simple method for the correction of such errors is proposed.

[1]  M. E. Cannon,et al.  GPS/MEMS INS integrated system for navigation in urban areas , 2007 .

[2]  Wujiao Dai,et al.  Assessment of Dynamic Measurement Accuracy of GPS in Three Directions , 2006 .

[3]  J P Hessling,et al.  A novel method of estimating dynamic measurement errors , 2006 .

[4]  James L. Davis,et al.  Accuracy of high‐rate GPS for seismology , 2006 .

[5]  Yong Li,et al.  Time Synchronization Error and Calibration in Integrated GPS/INS Systems , 2008 .

[6]  Yehuda Bock,et al.  load response on a large suspension bridge during the nYc marathon revealed by gps and , 2008 .

[7]  J P Hessling,et al.  A novel method of dynamic correction in the time domain , 2008 .

[8]  Stathis C. Stiros,et al.  Errors Introduced by Fluctuations in the Sampling Rate of Automatically Recording Instruments: Experimental and Theoretical Approach , 2008 .

[9]  Fanis Moschas,et al.  Measurement of the dynamic displacements and of the modal frequencies of a short-span pedestrian bridge using GPS and an accelerometer , 2011 .

[10]  Elliott D. Kaplan.  Understanding GPS : principles and applications , 1996 .

[11]  Dorota A. Grejner-Brzezinska,et al.  On accurate time synchronization of multi-sensor mobile mapping systems , 2008 .

[12]  Fanis Moschas,et al.  Noise Characteristics of Short-duration, High Frequency GPS-records , 2011 .

[13]  Austin A. Holland,et al.  Earthquake Data Recorded by the MEMS Accelerometer: Field Testing in Idaho , 2003 .

[14]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[15]  Dongha Lee,et al.  Optimal Methods of RTK-GPS/Accelerometer Integration to Monitor the Displacement of Structures , 2012, Sensors.

[16]  G. Veis,et al.  Airborne laser altimetry in the Ionian Sea, Greece , 2002 .

[17]  A. Demir,et al.  Phase noise in oscillators: a unifying theory and numerical methods for characterization , 2000 .

[18]  Alan Dodson,et al.  Impact of GPS satellite and pseudolite geometry on structural deformation monitoring: analytical and empirical studies , 2004 .

[19]  Michael A. Lombardi,et al.  The Use of GPS Disciplined Oscillators as Primary Frequency Standards for Calibration and Metrology Laboratories , 2008 .

[20]  Stathis C. Stiros,et al.  Spectral analysis of unevenly spaced or discontinuous data using the normperiod code , 2008 .

[21]  Paul T. Gayes,et al.  Spatially quantitative seafloor habitat mapping: example from the northern South Carolina inner continental shelf , 2004 .

[22]  Vassilis Gikas.  Ambient vibration monitoring of slender structures by microwave interferometer remote sensing , 2012 .

[23]  S. Stiros,et al.  Potential of Global Positioning System (GPS) to measure frequencies of oscillations of engineering structures , 2008 .

[24]  V. Gikas,et al.  AN INTEGRATED MOBILE MAPPING SYSTEM FOR DATA ACQUISITION AND AUTOMATED ASSET EXTRACTION , 2007 .

[25]  Yang Wang,et al.  Performance monitoring of the Geumdang Bridge using a dense network of high-resolution wireless sensors , 2006, Smart Materials and Structures.

[26]  Alan Dodson,et al.  Integrating a Global Positioning System and Accelerometers to Monitor the Deflection of Bridges , 2004 .