METHOD FOR IDENTIFYING THE MISMATCH ANGLES OF THE PINS OF THE CONTROLLED SYSTEM AND THE INS OF THE CARRIER AIRCRAFT Russian patent published in 2023 - IPC G01C21/16 

FIELD: aircraft technology.

SUBSTANCE: invention relates to the field of instrumentation and can be used in the installation of platformless inertial navigation systems (PINS) of a controlled system (CS). A method for identifying the misalignment angles of the CS PINS and the INS of the carrier aircraft (CA), uses the angular velocities of the output signals of the CS PINS and CA INS, the angular velocities are measured when performing a special maneuver of the CA. At the same time, additionally, at the command “start of the maneuver”, measurements of the INS and suspension PINS sensors begin to accumulate, a matrix of sensitivity functions is introduced, a model of the relationship between the angular velocity of the aircraft INS and the angular velocity of the PINS is formed, a vector of suspension angles is introduced, at the end of the maneuver, the PINS calculator calculates the suspension angles. For the calculation, an iterative method for sensitivity functions of images of processes of changing angular velocities in the frequency domain to variations of the desired suspension angles is used, while the Fourier transform is used to transfer processes to the frequency domain, image calculation for one frequency is performed taking into account the reduction to the actual form according to the Hartley method. The vector of the suspension angles is evaluated once at the end of the maneuver using the iterative procedure of the frequency least squares method, the correctness of the estimates of the suspension angles is monitored both in the frequency domain and in the time domain of the representation of transients, a message is issued about the results of the control.

EFFECT: providing the possibility of a one–time determination with the required accuracy of the angles of misalignment of the axes of the associated coordinate systems of the CS and CA in flight.

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