| Measurement of Structural Dynamic Behavior Using the Sensor Fusion of GPS and IMU |
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Junghyun Choi, Haneul Kang, Insik Chun |
| GPS와 관성센서의 융합에 의한 구조물 동적거동 측정 |
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최정현, 강하늘, 전인식 |
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| Abstract |
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An experimental study was conducted to demonstrate the validity of a sensor fusion technique combining GPS and IMU (Inertial Measurement Unit) to measure the dynamic displacement of structures. In the GPS measurement, a PPP (Precise Point Positioning) mode utilizing only a set of GPS was employed since a DGPS measurement is not available in such a remote position where offshore structures are commonly installed. Through the sensor fusion technique, we could compensate the shortcomings of each of GPS and IMU. A Kalman Filter was used for the sensor fusion to combine the signals from GPS and IMU, and its results were compared with the results of a laser displacement meter which provided a ground truth data. Finally, it was shown that the present sensor fusion technique gave a fairly accurate result even in the situation that the single use of either GPS or IMU cannot provide a right result at all. |
| Key Words:
Structural vibration; Sensor fusion; Kalman filter; GPS PPP; IMU |
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