Inversion study of current parameters based on attitude data of subsurface buoy system

Abstract

Subsurface buoy system is one of the most important devices to measure information of ocean environment. The profile of current can be measured by Acoustic Doppler Current Profilers (ADCP) mounted on the subsurface buoy system. However, the variation of position and orientation of ADCP can affect the precision of measurement. In this paper, current profile is retrieved from the attitude data of subsurface buoy system based on a practical case. Firstly, the dynamical analysis model of the subsurface buoy system and the cable equation are established by using polygonal approximation method of lumped mass. Secondly, according to the design parameters of surface buoy and the model, the equilibrium equations of nodes of the subsurface buoy system are built. In addition, the fitting function of depth and currents velocity is obtained by MATLAB. The simulation model of subsurface buoy system is established by using the force and lumped mass method, and the simulation of whole system is given to verify the attitude of the system based on the ADAMS software. Through the method of the inversion analysis, the current profile is obtained. This study has an important significance for determining the accurate information validation of current.