MATEC Web Conf.
Volume 188, 20185th International Conference of Engineering Against Failure (ICEAF-V 2018)
|Number of page(s)||10|
|Section||Fault Detection and Reliability in Cyber-Physical and Industrial Systems|
|Published online||07 August 2018|
Nonlinear optimal control for ship propulsion with the use of an induction motor and a drivetrain
Unit of Industrial Automation, Industrial Systems Institute,
2 Nonlinear Control Group, University of Northumbria, Newcastle NE1 8ST, UK
3 Industrial Systems Institute - RC Athena, 26504, Rion Patras, Greece
4 Department of Electrical and Computer Engineering, University of Patras, 26504, Rion Patras, Greece
5 Department of Industrial Engineering, University of Salerno, Fisciano, 84084, Italy
6 GE Global Research, General Elecric, Niskayuna, 12309, NY, USA
* e-mail: email@example.com
A nonlinear optimal (H-infinity) control method is proposed for an electric ship's propulsion system that consists of an induction motor, a drivetrain and a propeller. The control method relies on approximate linearization of the propulsion system's dynamic model using Taylor-series expansion and on the computation of the state-space description's Jacobian matrices. The linearization takes place around a temporary equilibrium which is recomputed at each time-step of the control method. For the approximately linearized model of the ship's propulsion system, an H-infinity (optimal) feedback controller is developed. For the computation of the controller's gains an algebraic Riccati equation is solved at each iteration of the control algorithm.The stability properties of the control method are proven through Lyapunov analysis,
© The Authors, published by EDP Sciences, 2018
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