STRAPDOWN INERTIAL NAVIGATION SYSTEM Russian patent published in 2022 - IPC G01C21/00 

FIELD: physics.

SUBSTANCE: invention relates to navigation devices and can be used to determine flight-navigation parameters of movement, geographical coordinates and parameters of angular position of aircraft in space. Strapdown inertial navigation system comprises unit (1) of gyroscopes, a group of accelerometers (2-6) and electronics unit (7) with a voltage source placed on housing (8). Housing (8) is connected to base (9), on which mounting frame (10) is mounted, as well as connecting elements for communication with external devices. Base (9) is made in the form of a panel with two working sides, one of which is interfaced with unit (1) of gyroscopes, and the other one - with housing (8) and with mounting frame (10). Mounting frame (10) on one side is equipped with a structure of flat faces perpendicular to the base panel and crossing each other in pairs to form a central mounting well (11) with mounting platforms on which accelerometers (2-6) are fixed. Housing of electronics unit (7) in the part facing base panel (9) is made hollow, with an insulated compartment shielded from penetration of electromagnetic radiation and released heat from electronics unit (7), and enclosing mounting frame (10) together with accelerometers (2-6).

EFFECT: increase in the accuracy of determining by the system of accelerations, velocities, geographical coordinates and parameters of the angular position of the aircraft in space by reducing the error in the deviation of the axes of sensitivity of the accelerometers, with simultaneous increase in structural rigidity of the system, simplified design of bearing parts of the system, improved layout capabilities for installation and connections with interfaced equipment in aircraft, and increased availability of equipment for maintenance.

8 cl, 3 dwg