An Overview about Dynamic Positioning of Ships

Output Feedback Passivity Based Controllers for Dynamic Positioning of Ships

Fuzzy Control of Dynamic Positioning Systems for Ships

In this paper we consider the control problem of Dynamic Positioning Systems for Ships (DPSS). It interests as a case which study in nonlinear controller design because the model exhibits nonlinear interaction in three degrees of freedom (surge, sway, and yaw) by means of main propellers aft of the ship. The DPSS system considered in this paper is modeled by a Takagi-Sugeno (T-S) type fuzzy mod...

An overview of clinical PET/CT

This article is intended to provide an overview of various aspects of clinical PET/CT. These include discussions of: (i) Important areas of clinical application; (ii) Opportunities in clinical research; (iii) Scanner and operating-mode considerations (e.g. BGO vs. LSO, LYSO or GSO scanners, 2D vs. 3D imaging). (iv) Study-specific considerations (e.g. patient preparation and positioning is...

A Linear Design Model for Wave Filtering and Dynamic Positioning ⋆

This paper describes a procedure to obtain an improved linear design model for Wave Filtering (WF) and Dynamic Positioning (DP) of ships and offshore rigs subjected to the influence of sea waves. The proposed model captures the main physics of the problem and allows for the design of advanced control and estimation algorithms to solve the WF and DP problems. Numerical simulations, carried out u...

Adaptive Wave Filtering for Dynamic Positioning of Marine Vessels Using Maximum Likelihood Identification: Theory and Experiments

This paper addresses a filtering problem that arises in the design of dynamic positioning systems for ships and offshore rigs subjected to the influence of sea waves. The dynamic model of the vessel captures explicitly the sea state as an uncertain parameter. The proposed adaptive wave filter borrows from maximum likelihood identification techniques. The general form of the logarithmic likeliho...