Research on fin stabilizers with lift feedback employed multi-sensor data fusion technology

Fin stabilizers with fin-lift feedback control can shield the mapping error of calculation between the fin angle and fin lift force, which exists in fin stabilizers with fin-angle feedback control, but in practical, there are some technical difficulties in lift fin stabilizers, such as lift force detection and lift force sensor installation, so it can´t achieve the well anti-rolling performance. Therefore, the fin stabilizer system with fin-lift/fin-angle integrated control is brought forward. Data fusion based on wavelet denoising technology is employed in system, which combines lift with fin angle local information from two sensors with different frequency ranges in order to eliminate redundancy and contradiction information, and using complementary information to obtain the relative integrity of the lift force signal. The system model is established in this paper, and the fused signal and the anti-rolling performance of this model are simulated respectively. The results are shown that the control system can achieve the better anti-rolling performance in different sea situation.