A Reactive Collision Avoidance Algorithm for Vehicles withUnderactuated Dynamics

Author
Syre Wiig, Martin
Pettersen, Kristin Ytterstad
Krogstad, Thomas Røbekk
Date Issued
2017
Keywords
Ubemannede kjøretøyer
Marinefartøyer
Akselerasjon
Permalink
http://hdl.handle.net/20.500.12242/844
https://publications.ffi.no/123456789/844
DOI
10.1109/CDC.2017.8263858
Collection
Articles
Description
Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Krogstad, Thomas Røbekk. A Reactive Collision Avoidance Algorithm for Vehicles with Underactuated Dynamics. I E E E Conference on Decision and Control. Proceedings 2017 s. -
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Abstract
This paper presents a reactive collision avoidance algorithm, which avoids both static and moving obstacles by keeping a constant avoidance angle between the vehicle velocity vector and the obstacle. In particular, we consider marine vehicles with underactuated sway dynamics, which cannot be directly controlled. This gives an underactuated component in the vehicle velocity, which the proposed algorithm is designed to compensate for. The algorithm furthermore compensates for the obstacle velocity. Conditions are derived under which the sway movement is bounded and collision avoidance is mathematically proved. The theoretical results are supported by simulations. The proposed algorithm makes only limited sensing requirements on the vehicle, is intuitive and suitable for a wide range of vehicles. This includes vehicles with heavy forward acceleration constraints, which is demonstrated by applying the algorithm to a vehicle with constant surge speed.
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