Abstract:

In order to eliminate the Schuler periodic oscillation and Foucault periodic oscillation of the marine strapdown inertial navigation system (SINS), the damping equalizer in the level loop is introduced. However, after the introduction of damping equalizer, there will be a long settling time before the system achieves steady, during which the system will have overshoot phenomenon that makes the system performance cannot be guaranteed. In order to reduce the settling time, the backward calculation which forms round robin algorithm with the forward calculation is proposed. The SINS uses the information stored in the computer to adjust the damping in the computer, which can make the system achieve steady fast. Finally, the computer simulation results show that the proposed method can effectively shorten the damping settling time.