Floating offshore wind measurement system by using lidar and its verification

Several studies have been carried out focusing on floater motion compensation1). However, the detailed algorithm for motion compensation is not described. The most simple motion compensation algorithm is simply to perform coordinate transformation. Fujitani2) applied coordinate transformation for sonic anemometer on ship. But due to the difference in the mechanism of wind speed measurement between sonic anemometer and lidar, the coordinate transformation may not be used. Another problem is that there is no validated method for the measurement of the motion of the floater. Typically gyro and accelerometer are used to measure the floater motion. But numerical integral may introduce additional error. On the other hand, GPS can give the position of the floater directly, but the accuracy easily changes depending on satellite conditions.