Methodology of Linear-Quadratic Control of Propulsion Complexes with Single Electric Power Systems

EasyChair Preprint 15628

Abstract

To verify the proposed control methods, simulations are performed with a comparison of the step responses of the closed system to overload and turning speed. First, the model is checked, and then it is observed how well the model and the controller work together. The simulation of speed jumps showed an adequate response, but the rotation speed of the APP propellers showed a more significant effect on the system than the orientation of the APP. In the simulation of the turning speed, the azimuthal angle did not correspond to the limitations of the rotation frequency of the APP. The calculated angles reached values greater than 2π, which corresponds to the zero angle according to the trigonometric function. In other words, a linear dependence on the azimuthal angle is observed, which is the result of linearization. It is proposed to implement the proposed solution from the point of view of obtaining a more adequate dependence on the frequency of rotation of the APP.

A method was also proposed for solving the dependence between the longitudinal movement, drift and rotation velocities, which is the result of using an overly simplified model or choosing the wrong operating point of centripetal and Coriolis linearization. Despite these problems, the simulations showed the potential of the model and controller used in such situations. Several modifications are also proposed to significantly improve the model and simulation, in particular, the introduction of gain planning to linearize the response of the APP, which will lead to a greater influence of the propeller rotation frequency on the ship's controllability.

Keyphrases: Dual purpose, Linear Quadratic Controller, Optimization, combined propulsion complex, modeling, thruster

@booklet{EasyChair:15628,
  author    = {Oleksandr Pasichnyk and Valerii Shevchenko and Vitalii Budashko},
  title     = {Methodology of Linear-Quadratic Control of Propulsion Complexes with Single Electric Power Systems},
  howpublished = {EasyChair Preprint 15628},
  year      = {EasyChair, 2024}}