Abstract-This paper presents the design and development of an enhanced inertial navigation system that is to be integrated into the Morpheus autonomous underwater vehicle at Florida Atlantic University. The inertial measurement unit is based on the off-the-shelf Honeywell HG1700-AG25 3-axis ring-laser gyros and three-axis accelerometers and is aided with ground speed measurements obtained using an RDI Doppler-velocity-log sonar. An extended Kalman filter has been developed, which fuses together asynchronously the inertial and Doppler data, as well as the differential global positioning system positional fixes whenever they are available. A complementary filter was implemented to provide a much smoother and stable attitude estimate. Thus far, preliminary study has been made on characterizing the inertial navigation system-based navigation system performance, and the corresponding results and analyzes are provided in this paper.

This paper presents a localization strategy for an AUV which autonomously docks on intervention panels. A brief review of past research and working solutions of docking motivates the proposed choice of the strategy. It combines a ranging sonar localization technique featuring a modified particle filter at large distance and a visual model-based pose estimation using on-board camera at close distance to the docking panel. The particle filter solution is enhanced for effective exploration of the vehicle states without increasing the computational demand. It operates in an environment with a known map and has a real-time performance. The pose recognition algorithm derives from POSIT and is optimized for robustness. The visual docking utilizes a set of point-light markers which guarantees good accuracy at a large range of angles. Mentioned strategies are proven in a number of simulations as well as practical tests.978-1-4244-2620-1/08/$25.00 ©2008 IEEE

No abstract

No abstract

No abstract