The objective of the article is to classify the asymptotical dynamics behaviour of a marine propulsion plant by using two parameters bifurcation. The marine propulsion plant is mathematically represented by a three-dimensional system of non-linear ordinary differential equations (ODE). The presented mathematical methodology is referred to a generic twin-screw ship, with a Combined Gas and Gas propulsion configuration (COGAG). The non-linear ODE system proposed by the authors in a previous paper  represents the hull dynamics, the machinery dynamics, and the action of the propulsion control device. In the previous paper, the mathematical structure of the model, some simulations and a validation on the base of full scale sea trials data, were presented. The present paper is more focused on the stability analysis of the system, in order to assess the numerical values of some important control parameters. The analysis may be useful in the preliminary design phase of the propulsion control device in order to evaluate the best control parameters and to avoid some unwanted dynamical behaviour such as chaos or periodicity.
|Title of host publication||Computational methods in marine engineering 2009|
|Subtitle of host publication||[extended abstracts presented at MARINE 2009, the Third International Conference on Computational Methods in Marine Engineering, held at the Norwegian University of Science and Technology (NTNU) in Tronheim, Norway, 15-17 June 2009]|
|Place of Publication||Barcelona|
|Number of pages||4|
|Publication status||Published - 19 Jun 2009|
|Event||3rd International Conference on Computational Methods in Marine Engineering - Norwegian University of Science and Technology, Trondheim, Norway|
Duration: 15 Jun 2009 → 17 Jun 2009
|Conference||3rd International Conference on Computational Methods in Marine Engineering|
|Period||15/06/09 → 17/06/09|
- non linear differential equations
- phase portrait
- numberical simulations
- marine gas turbine
- ship propulsion
Altosole, M., Coraddu, A., & Figari, M. (2009). Two-parameter bifurcation of equilibria in continuous-time of naval dynamical systems. In Computational methods in marine engineering 2009: [extended abstracts presented at MARINE 2009, the Third International Conference on Computational Methods in Marine Engineering, held at the Norwegian University of Science and Technology (NTNU) in Tronheim, Norway, 15-17 June 2009] (pp. 356-359).