Study On The Measureing Of The Instantaneous Movements Of The Ships Based On SINS

Many large warships carry on carrier-borne aircrafts. In the process of taking off and loading of the aircrafts, accidents usually occur. In order to improve the survival capability and safety performance of the aircrafts, especially when the ships face to a bad situation in the sea, whether we can extract the information about instantaneous movement of the ships has a great meaning for ensuring the safety of the carrier-borne aircrafts.This paper designs the strap-down instantaneous movement module, this module can make full use of strap-down output information of the ships in the work, it also can distill and output the information about the heave, surge and sway movement of the ship.This paper firstly, has defined the heave, surge and sway movement, that they are the kind of movement which is named Instantaneous movement of the ships. It also analyzed the differences between instantaneous line movement and the motion characteristics information work. This paper has defined the instantaneous line, established the mathematical model of the instantaneous movement ship strap-down expansion, system function, establish the transient motion of the module.According to the mathematical model of instantaneous movement, the plans to calculate the information of instantaneous movement are put forward on the basis of strap-down inertial Navigation. The module proposed two plans; first integral to filter and first filtering. In this module, according to different situations, different information options, we choose different plan to calculate the instantaneous movement information.In order to solve this problem, the selection of filter was designed based on multiple filters, and the instantaneous movement to establish filter modules to filter performance simulation signal. Finally both accuracy and real-time, select the optimal filter, the relative filters filter, can be used in the calculation of ship motion.Finally, we used the strap-down instantaneous movement module in Dalian maritime navigation system test. The experiment proved that the instantaneous movement module under the sea, in complex module of regular work in the process of application, reached the level.