An anti‐vibration‐shock inertial matching measurement method for hull deformation

In order to establish a unified spatial reference for the whole ship, inertial matching measurement of hull deformation is widely used because its continuity and concealment. However, vibration-shock signal shipborne equipment often brings short-time output disturbance user-side fibre gyroscope unit (FGU), will bring great challenges accuracy convergence measurement. To solve these problems, authors put forward new algorithm named as attitude quaternion method-improved double factor adaptive Kalman filter-parameter filter (AQM-IDFAKF-PAKF). (1) The AQM established FGU observation build basic model method. (2) introduced IDFAKF track trend dynamic in vibration interference by using historical data. (3) After judging anti-vibration-shock calculation stop node, PAKF was utilised adaptively adjust parameters after vibration-shock, so quickly calculate static angle shock interference. Numerical simulation results illustrated that AQM-IDFAKF-PAKF can converge with small steady-state error under condition