Sensor Fusion for Underwater Navigation of Unmanned Underwater Vehicle

Sur, Joo-No

Journal of the Korea Institute of Military Science and Technology 2005;8(4):14-23.

Joo-No Sur

무인잠수정의 수중합법을 위한 센서융합

서주노

해군사관학교 기계공학과

Abstract

In this paper we propose a sensor fusion method for the navigation algorithm which can be used to estimate state vectors such as position and velocity for its motion control using multi-sensor output measurements. The output measurement we will use in estimating the state is a series of known multi-sensor asynchronous outputs with measurement noise. This paper investigates the Extended Kalman Filtering method to merge asynchronous heading, heading rate, velocity of DVL, and SSBL information to produce a single state vector. Different complexity of Kalman Filter, with. biases and measurement noise, are investigated with theoretically data from MOERI's SAUV. All levels of complexity of the Kalman Filters are shown to be much more close and smooth to real trajectories then the basic underwater acoustic navigation system commonly used aboard underwater vehicle.

Key Words: UUV, EKF, DVL, SSBL, Sensor Fusion, Navigation