The marine integrated
optical fiber gyro strapdown vertical reference
system adopts an
integrated design, all of which are installed in one shell, including the
optical fiber gyroscope inertial group, I / F conversion circuit,
pulse counting interface circuit, secondary power supply AC /
DC circuit,
digital interface circuit 1. The integrated
information processor CPU collects the
original data of three
fiber optic gyroscopes, three
accelerometer outputs and temperature sensors via the
digital interface circuit and the
pulse counting interface circuit, uses the pre-established error model to perform error compensation, and then performs inertial navigation Calculation, on the basis of navigation calculation, establish the state equation of the
system, and perform
kalman filter according to the auxiliary velocity information input from the outside world, obtain the attitude error through filtering and complete the correction of pure
inertia, so as to obtain high-precision attitude information output . The invention realizes the full digital output interface, has the advantages of compact structure, long service life, high reliability, good environmental adaptability and low
power consumption, and can be applied to ship-borne weapons, vehicle-mounted weapon systems and the like.