METHOD OF AUTONOMOUS NAVIGATION FOR SPACE OBJECT Russian patent published in 2020 - IPC G01C21/24 

FIELD: physics.

SUBSTANCE: invention relates to the field of navigational instrument-making and can be used in systems for self-contained navigation of space objects: carrier rockets, booster rockets and spacecraft using a platform inertial navigation system, the main element of the inertial measuring unit of which is a triaxial gyro-stabilized platform (GSP). For this purpose, in addition, components of the angular speed vector of the object are periodically measured using angular velocity sensors, the absolute value of the measured rotation angle of the gyro-stabilized platform is periodically compared in the axis of rotation of its intermediate frame |ψ| with maximum permissible value corresponding to "folding" of GPS frames, and in case of value |ψ| maximum allowable value at time t₁, starting from this point in time, system of kinematic equations of angular motion of object

is numerically integrated with initial conditions

,

and full acceleration vector is calculated by formula , where

,

is apparent acceleration vector, is gravitational acceleration vector, γ(t₁) and γ_m(t₁) Is the measured and "model" angles of rotation of the GSP inner frame (frame) type internal frame, with accelerometers installed on it relative to the GSP intermediate frame plane, ψ(t₁) and ψ_m(t₁) is the measured and "model" angles between the intermediate GSP frame and the normal to the outer frame of the GPS, ϑ(t₁) and ϑ_m(t₁) Is the measured and "model" angles between the plane of the outer frame of the GPS and the longitudinal axis of the object, t₁ Is the moment of time, when the absolute value of the measured angle ψ(t₁) will reach value ψ_max, which corresponds to the phenomenon of "folding" frames of GSP. As a result, expansion of functional capabilities is achieved based on increasing probability of successful completion of flight in case of emergency situation such as "addition of frames" of GSP (when the absolute value of angle ψ between the intermediate frame and the normal to the external frame of the GSP maximum permissible value) due to action of non-standard disturbances.

EFFECT: broader functional capabilities.

1 cl, 2 dwg