Analysis On Control Methods And Preliminary Design Of SWATH Ship

The Small Waterplane Area Twin Hull (SWATH) ship is one kind of the merit high performance ships which has the neper performance finely, center the high speed under resistance and whose deck area is spacious and so on. Thus it has received the various countries widespread attention.The article published mainly is with emphasis places the SWATH ship aspect of overall structure, hydrodynamic force and its movement performance, reduces to it swings the control the analysis as well as the synthesis realization . But in the SWATH ship longitudinal motion and the high speed situation hangs swings the movement to affect it directly in the marine movement posture, then affects the ship the movement stability. Therefore strengthens to the SWATH ship control method research has the vital significance. Not only may enrich the SWATH ship to reduce swings the aspect the research material; Moreover regarding take catamaran technology as foundation polysome ship, also may provide in the high speed sagging swings with the pitch movement reference.This article divides into five parts. The first part, has made the simple introduction to the SWATH ship structure characteristic and the performance, and reviewed more than 50 years development course. The second part, obtained from the theoretical analysis, has established the pitching and hangs swings the movement the mathematical model, and by the different frequency regular wave and the irregular wave took the SWATH ship the perturbation signal, studied it under the different wave action pitching, hangs swings the state of motion. The analysis reduces swings the fin the function. The third part, studied the stabilizing fin to install factor and so on position, area to the SWATH ship transport dynamic stability influence, enumerated several groups of data to carry on the optimized analysis. The fourth part, has designed SWATH ship stabilizing fin PID and the optimum control, and conducts the simulation research and the comparison to its function effect. Through the analysis, in under this controller function, the stabilizing fin may provide the quite good sea keeping for the SWATH ship longitudinal motion. The fifth part, in completes the first several work in the foundation, proposed initially reduces swings the fin synthesis realization, has produced the hardware connection as well as the software communication , not only has filled domestically in this aspect blank, moreover reduces to the final catamaran swings the fin the product realization to have the certain significance.