Synthesis of mathematical model of controlled electromotive device of pilotless floating vehicle

4th International Scientific Conference SEA-CONF 2018

Volyanskaya, Ya^1

Admiral Makarov National University of Shipbuilding, 9, Heroiv Ukrainy Ave., Mykolayiv

54025, Ukraine^1

关键词: Electric propulsion systems;    Geometric characteristics;    Hydrodynamic torques;    Liquid dielectrics;    Mechanical characteristics;    Mechanical energies;    Non-linear hydrodynamics;    Nonlinear characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/172/1/012008/pdf
DOI  :  10.1088/1755-1315/172/1/012008

来源: IOP

【 摘 要 】

The features of mathematical modelling of the propulsion system of the electric motion of the autonomous floating vehicle are determined. Additional losses of mechanical energy of special-purpose asynchronous motors during their operation in a liquid dielectric medium are taken into account. As well as the correct modelling of the nonlinear characteristics of the screwpropeller throughout the range of angular velocity as essentially nonlinear hydrodynamic objects. The mathematical model is created based on the simplified functional scheme of the electromotive device of the autonomous floating vehicle as a control object. It contains an expression for the relative pitch of the screw-propeller. As well as the proposed method of clarifying the loss coefficient of braking hydrodynamic torque by taking into account the individual geometric characteristics of the electric motor and the characteristics of different types of filling the electric motor, dielectrics. It is shown with the use of experimental data that the mechanical characteristic of the engine depends significantly on the temperature and the type of the working fluid, so the influence of these parameters must be taken into account in the synthesis of the electric propulsion systems of the pilotless floating vehicle.