Zobrazeno 1 - 10
of 366
pro vyhledávání: '"Thor I. Fossen"'
Publikováno v:
IEEE Access, Vol 12, Pp 109822-109831 (2024)
This work presents a novel method for 3-D path-following and path-tracking of Autonomous Underwater Vehicles (AUVs) using the concept of a Virtual Reference Point (VRP) and a kinematic guidance principle. The origins of the along-, cross- and vertica
Externí odkaz:
https://doaj.org/article/16f8a154907a4278b6feb04aee5aef55
Publikováno v:
IEEE Access, Vol 11, Pp 45688-45710 (2023)
Docking is a safety-critical operation for autonomous surface vehicles and requires highly accurate navigation signals. Since Global Navigation Satellite Systems (GNSS) can be unreliable and inaccurate in urban environments, other sensors should be c
Externí odkaz:
https://doaj.org/article/a5d54254df954f729d4aa21cc21fd704
Autor:
Thor I. Fossen
Publikováno v:
IEEE Access, Vol 11, Pp 12587-12593 (2023)
The overall goal of the paper is to derive a kinematic model for vehicle path-following systems, where the pitch and yaw angles $(\theta, \psi)$ together with the surge velocity $u$ can be treated as control inputs. Then the outer control loop can be
Externí odkaz:
https://doaj.org/article/9f43de1210b5459daac0a0c9bb3dd473
Publikováno v:
Modeling, Identification and Control, Vol 42, Iss 1, Pp 17-26 (2021)
Dynamic models of ships have been widely used for model-based control and short-term prediction in the past. Identifying the parameters of such models has mainly been done through scaled model tests, full scale tests or computational fluid dynamics s
Externí odkaz:
https://doaj.org/article/68d54f13206943448a6dc4dd960851f2
Autor:
Sindre Fossen, Thor I. Fossen
Publikováno v:
Modeling, Identification and Control, Vol 39, Iss 4, Pp 233-244 (2018)
This paper addresses the problem of ship motion estimation using live data from Automatic Identification Systems (AIS). A globally exponentially stable observer for visualization and motion prediction of ships has been designed. Instead of using the
Externí odkaz:
https://doaj.org/article/f5379650362a44f686749abefcc96547
Autor:
Sindre Fossen, Thor I. Fossen
Publikováno v:
Sensors, Vol 21, Iss 23, p 7910 (2021)
Small USVs are usually equipped with a low-cost navigation sensor suite consisting of a global navigation satellite system (GNSS) receiver and a magnetic compass. Unfortunately, the magnetic compass is highly susceptible to electromagnetic disturbanc
Externí odkaz:
https://doaj.org/article/6745c3ee1594456aa2e8f6141728d72c
Autor:
Erlend M. Coates, Thor I. Fossen
Publikováno v:
Applied Sciences, Vol 11, Iss 7, p 3147 (2021)
This paper presents nonlinear, singularity-free autopilot designs for multivariable reduced-attitude control of fixed-wing aircraft. To control roll and pitch angles, we employ vector coordinates constrained to the unit two-sphere and that are indepe
Externí odkaz:
https://doaj.org/article/78a449abf4d14defa063f333bbb48f8c
Publikováno v:
Modeling, Identification and Control, Vol 34, Iss 4, Pp 183-198 (2013)
This paper proposes a novel methodology, based on Fermat's spiral (FS), for constructing curvature-continuous parametric paths in a plane. FS has a zero curvature at its origin, a property that allows it to be connected with a straight line smoothly,
Externí odkaz:
https://doaj.org/article/bb0e1338a7fb470fb26ac473d6a51c47
Publikováno v:
Modeling, Identification and Control, Vol 29, Iss 4, Pp 131-149 (2008)
This paper considers the subject of straight-line target tracking for unmanned surface vehicles (USVs). Target-tracking represents motion control scenarios where no information about the target behavior is known in advance, i.e., the path that the ta
Externí odkaz:
https://doaj.org/article/e04e4481b1194de98c2357c1c1ea06d6
Autor:
Tristan Perez, Thor I. Fossen
Publikováno v:
Modeling, Identification and Control, Vol 29, Iss 3, Pp 93-102 (2008)
This paper addresses the problem of joint identification of infinite-frequency added mass and fluid memory models of marine structures from finite frequency data. This problem is relevant for cases where the code used to compute the hydrodynamic coef
Externí odkaz:
https://doaj.org/article/e63fd1650492406b9d20c2c481c2f44f