The Measurement Technology On Instantaneous Line Motion Of Vessel

The development of inertial technology is more and more wide and the inertial navigation devices have been generally installed on large and medium-sized ships.Because of their unique independence,stability,concealed,inertial navigation devices are strongly welcome in military field.The performance of inertia devices requirements are also increasing,and posture,location and other information have been unable to meet the needs of users,especially the military.Ship instantaneous line sports information,including the ship's heave,vertical swing,sway information needs very urgent.Research of this paper is the instantaneous line motion measurement technology,aiming to propose a practical measurement solution.Inertial navigation equipment need initial alignment in the start of working.Firstl,introduces the common compass alignment method,alignment ship process,due to differences in inertial navigation equipment and electromagnetic gun point the meter instrument will give initial alignment error into outer arm,to eliminate the effect of the external lever arm influence,the paper was carried out meticulous research,illustrated by demonstrating specific deduced speedometer under influence outside lever arm effect of the speed error specific formula and gives the error compensation scheme.An important tool for measuring the instantaneous line ship movement is a digital filter,this paper ship motion data filtering scheme carried out a detailed analysis of commonly given finite impulse response filters and infinite impulse response filter mathematical principles and specific design steps,by analyzing the interference information and comprehensive comparison of the ship,the final selection of the high-pass digital filter for filtering the collected data.After solving the data filter,the output data will have delays,we use adaptive neural network fuzzy control system for processing capability nonlinear problems,the data were fitted filtered estimates,forecasts after a short period of time trend data,the data in advance for a given period of time,so as to eliminate the effect of the filter delay.In this paper,the data output of the ship's motion model simulation analysis,its solver,filtering,measuring the instantaneous movement of information.Then use laboratory triaxial turntable,turntable set exercise program,collecting information turntable movement,to gather information for offline analysis,the solver to obtain the vertical displacement movement solver results are consistent with the set,which further confirmed that the the feasibility of the program.Jiang trial of the experimental data,offline solver analysis,ship heave displacement in the river,and for the emergence of delays in the filtering process,the use of ANFSI be eliminated,to obtain a more rational outcome.