External Force Field Modeling for Autonomous Surface Vehicles
This addresses the challenge of operating ASVs in adverse environmental conditions, which is incremental as it applies existing modeling techniques to a specific domain.
The paper tackles the problem of modeling external force fields (wind and currents) for Autonomous Surface Vehicles (ASVs) operating in lakes and rivers, proposing a method that integrates sensor data into a Gaussian Process to build an environmental force map, with experimental field trials validating the approach.
Operating in the presence of strong adverse forces is a particularly challenging problem in field robotics. In most robotic operations where the robot is not firmly grounded, such as aerial, surface, and underwater, minimal external forces are assumed as the standard operating procedures. The first action for operating in the presence of non-trivial forces is modeling the forces and their effect on the robots motion. In this work an Autonomous Surface Vehicle (ASV), operating on lakes and rivers with varying winds and currents, collects wind and current measurements with an inexpensive custom-made sensor suite setup, and generates a model of the force field. The modeling process takes into account depth, wind, and current measurements along with the ASVs trajectory from GPS. In this work, we propose a method for an ASV to build an environmental force map by integrating in a Gaussian Process the wind, depth, and current measurements gathered at the surface. We run extensive experimental field trials for our approach on real Jetyak ASVs. Experimental results from different locations validate the proposed modeling approach.