S.S. Matveev1, A.Yu. Truschinsky2, V.T. Yankovsky3

1,2 MESC AF «N.E. Zhukovsky and Yu.A. Gagarin Air Force Academy» (Voronezh, Russia)
3 JSC NIIP named after V.V. Tikhomirov (Zhukovsky, Moscow region, Russia)
1 gres02@yandex.ru, 2 ws6@rambler.ru, 3 kjj_@mail.ru

The low noise immunity of navigation equipment of consumers of global navigation satellite systems leads to an increase in errors in estimating speed parameters during complex measurement processing in conjunction with a free-form inertial navigation system. In this regard, reducing these errors is an urgent scientific task. To solve this problem, it is necessary to use an additional channel for correcting speed parameters. This article develops a method for complex processing of measurements of a strapless inertial navigation system and a two-channel coherent radio altimeter of an aircraft.

Goal – to develop a method for complex processing of measurements of a strapback inertial navigation system and a two-channel coherent radio altimeter in the interests of improving the accuracy of the aircraft navigation system.

Based on mathematical modeling, the proposed method has obtained errors in estimating the components of the aircraft's speed. The effectiveness of the proposed method is determined by estimating the magnitude of the deviation of an aircraft, such as a barrage munition, hitting a stationary target in the picture plane. In the absence of correction of the free–form inertial navigation system, the deviation was 117 m. With correction from a two-channel coherent radio altimeter, it was less than 1 m.

The proposed method can be used by developers of modern and promising aircraft navigation systems, including unmanned aerial vehicles.Keywords: two-channel coherent radio altimeter, free-form inertial navigation system, integrated information processing, aircraft speed measurements.

Matveev S.S., Truschinsky A.Yu., Yankovsky V.T. Comprehensive measurement processing of a strapback inertial navigation system and a two-channel coherent radio altimeter aircraft. Science Intensive Technologies. 2025. V. 26. № 4. P. 35−40. DOI: https://doi.org/ 10.18127/j19998465-202504-04 (in Russian)

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