METHOD OF ALIGNMENT OF PINS AC OF SHIP BASE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC G01C23/00 

FIELD: airpower.

SUBSTANCE: method for alignment of platformless inertial navigation system of aircraft (PINS AC), based on combined processing by Kalman filtering method of output signals of PINS AC and INS of basing ship, corresponding to the angular velocities measured by three-component angular velocity sensors (CRS) mounted on the aircraft and on the ship, additionally includes the measurement of the value of AC course relative to the geographic meridian (ψ_g). The alignment is carried out in two stages. At the first stage, linear accelerations along the axes of the associated coordinate system of basing ship and associated coordinate system of AC are measured, the coordinates of the AC PINS relative to the ship's INS are determined, and the swing and pitch alignment is performed by matching the overload vectors using the Kalman statistical filter of the second order. The alignment can be executed both in the static position of basing ship, and at its rolling and maneuver. At the second stage, the alignment is performed in the azimuth by measuring and coordinating the angular velocity vectors of the ship and the AC and measuring the linear accelerations along the axes of the associated coordinate systems of basing ship and AC, and if for 5-10 seconds there is no rolling of the ship with angular velocities ω_x<2-3 degrees/s, perform a zigzag type maneuver and process the measurement signals using Kalman filter of the third order with measuring vector dimension of six. The device implementing this method of alignment the PINS AC of ship base, including the basing ship's INS and PINS AC, based on the ship, additionally comprises a Jacobi array forming unit, a course and position selector for AC base point, the first Kalman statistical filter of second order, and the second Kalman statistical filter of the third order, wherein the outputs of the ship's INS and PINS AC are connected to the Jacobi array forming unit. The first output of the Jacobi array forming unit and the course and position selector output of AC are connected to the corresponding inputs of the first Kalman statistical filter. The second output of the Jacobi array forming unit and the outputs of the first Kalman statistical filter are connected to the corresponding inputs of the second Kalman statistical filter whose outputs are connected to the corresponding PINS AC inputs, based on the ship.

EFFECT: reduction of the time of platformless inertial navigation systems of aircraft on a ship alignment, while ensuring the required accuracy.

4 cl, 5 dwg