Method and system for measuring motion speed of rotating object based on satellite navigation

Abstract

The invention provides a movement speed measuring method and system based on satellite navigation for rotary objects, and relates to the technical field of navigation. The method includes the steps of using at least two signal receiving devices to receive first radio-frequency signals and second radio-frequency signals, wherein the signal receiving devices are arranged on a target object and are symmetrical to a central axis; conducting intermediate-frequency path combination on first intermediate-frequency signals and second intermediate-frequency signals to obtain combined path signals, and conducting base band demodulation on the combined path signals to obtain satellite Doppler and other observation quantity information; utilizing the obtained Doppler and other observation quantity information to assist the first intermediate-frequency signals and the second intermediate-frequency signals in conducting base band demodulation treatment to obtain two corresponding Doppler observation quantities separately; according to the two Doppler observation quantities, creating a simultaneous equation system and solving the simultaneous equation system to obtain translational speed and rotational speed of the target object to eliminate influences of rotational motion on the precision of the speed calculation of the objects. By using the movement speed measuring method and system based on the satellite navigation for the rotary objects, not only can the translational speed of missile bodies be precisely figured out, but the rotational speed of the missile bodies can be obtained to achieve precise manufacturing and guidance of guided missiles.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a method and system for measuring the moving speed of a rotating object based on satellite navigation. Background technique [0002] Because satellite navigation is not affected by weather and range and has high positioning accuracy, satellite navigation has been widely used in the process of missile guidance. However, during the high-speed flight of the missile, the satellite signal is often interrupted by the rotational movement, which brings great difficulties to the baseband demodulation of the signal. Moreover, the real-time measurement of the rotational speed is also the key to the accurate guidance of the missile body. [0003] At present, the problem of signal interruption caused by projectile rotation is mainly solved by the following methods: select the microstrip loop antenna as the satellite navigation receiving antenna, and the omnidirectionality of the microstrip...

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method and system for measuring the speed of a rotating object based on satellite navigation, so as to solve the problem in the prior art that the influence of rotating motion on satellite Doppler cannot be eliminated, which will seriously affect the The precise solution of the translational velocity of the projectile, and the rotational velocity of the projectile cannot be obtained, so that the projectile cannot achieve precise guidance

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