Error analysis of speed reference system for ADL

Error sources of the speed reference system for ADL are analyzed.The speed reference system is consisted of DGPS and a platform gyro.Unstable controls of the driving and steering of the vessel, instability of the ocean current velocity and directions, positioning error in the DGPS and direction error of the platform gyro are the error sources of the speed reference system.Computer simulation results are given.From these results, relations between the velocity measuring error of the reference system and main error sources can be obtained.