Study On Movement And Energy Optimization Of Zero-speed Fin Stabilizer

When ship sailing on the sea, it will produce complex non-linear movement for the disturbance of wind, waves and other random noise. These movements have impact on the ship's normal driving and functions to achieve, especially the ship's rolling. It is not just a state of high speed ships, for some parked in the dock or sea research vessels, the roll at this point is not to be ignored.The lift of traditional anti-rolling fin is generated by the role of water flow when the fin angle of attack is turned to a fixed angle by using the energy of the host, and this lift is used to against the interference of waves. However, when the ship traveling at zero speed, there is no incoming flow speed, at this time can not use the work of the traditional fin to demand zero-speed fin. Zero speed fins'lift is generated mainly by the fins active flap around the fin-axis in the horizontal plane. The necessary impetus of this flapping is provided entirely by the servo system. This energy consumption is a heavy burden for the ship with limited power. At present, most literature about the zero-speed is based on lift modeling, there is no one involved in the issue of energy consumption of the fin. This article is mainly aimed at discussing the energy optimization of the zero-speed fin.First of all, introduce the subject sources, fin and its control system development overview, and elaborated on the traditional fin and zero-speed fin of the anti-rolling theory. On this basis, gradually expand to analyze the energy optimization of the zero-speed fins. Fin energy optimization is not only relevant to the control system, but also with the fin-shaped itself. This topic in-depth analyzes and researches the fin-shaped selection, and analyzes the fin at high speed. At the same time, ensuring effectively rolling at high speed.Secondly, the zero-speed fin energy consumption is also related to control system. In this article, choose genetic algorithm to optimize the parameters of PID controller. The controller with optimized parameters significantly improved the efficiency of zero-speed fin; it also saves the system energy in some degree. Finally, set 0. 5 margin for the ship, this will not only satisfy the requirements of anti-rolling, but also save the system energy. According to the shipping parameters and fin-shaped selection criteria, choosing the appropriate zero-speed fin to simulate the ship rolling angle before and after the fin work and the energy consumption. After verifying, a series of optimization measures can save the energy of servo system, achieving the purpose of energy optimization.