This article mainly introduces the principle of the multi-level recursive prediction method and the first application example to the pitching movement prediction of a large-sized naval vessel.

The test results show that the longitudinal motions of the hybrid monohull s.

Due to the lower efficiency of stratospheric airship s motion control, changing the center of gravity position in order to control airship s longitudinal motion was discussed.

A mathematical model of longitudinal motion control system on SWATH is presented and its experimental platform is established in this paper.

Based on a typical ship, this paper establishes a model of longitudinal movement and then discusses three ways of disturbance estimation: central difference, corlored Kalman filter and extended Kalman filter.

The code considers both transverse and longitudinal movements in the accelerators using a used 4 order variable step Runge Kutta method to calculate the beam envelope of the transverse movement, the phase oscillation curve of the longitudinal movement, the energy growth, the energy distribution at the exit, and the longitudinal electric and magnetic field distributions.