Method for rapidly measuring speed of flying target by fixed single station

A technology of flying targets and velocity vectors, applied in measuring devices, radio wave measuring systems, using re-radiation, etc., to achieve the effects of improved measurement accuracy and simple methods

Inactive Publication Date: 2011-01-05
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

[0002] Simple direct use of Doppler effect can only get radial velocity

Method used

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  • Method for rapidly measuring speed of flying target by fixed single station
  • Method for rapidly measuring speed of flying target by fixed single station
  • Method for rapidly measuring speed of flying target by fixed single station

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Experimental program
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Embodiment

[0036] A method of directly detecting the velocity vector of a moving target in the air by using a fixed single station based only on frequency measurement technology, and through the application of the direct detection of the spacecraft's running speed, the specific implementation of this method is described. figure 1 The geometrical relationship of fixed single-station Doppler direct velocity measurement is given; figure 2 The trajectory of the uniform moving satellite is schematically given; image 3 For different detection times, the relative error variation curve of velocity measurement value with lead angle is given; Figure 4 For different radial distances, the curves of the relative error variation curves of the speed measurement value with the lead angle are given; Figure 5 The error simulation calculation curves of the velocity measurement formula relative to the theoretical value of the spacecraft at different flight distances are given; Figure 6 The error simu...

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Abstract

The invention discloses a method for rapidly measuring the speed vector of a flying target by a fixed single station. The method comprises the following steps of: directly sending a beacon signal to a land station or indirectly reflecting a detection signal of an irradiator on the premise of assuming that an aerocraft linearly moves at a constant speed and reaches a measuring node (3) from a measuring node (1) and through a measuring node (2); continuously measuring the signal for at least three cycles by the land station with the Doppler frequency shift measuring function to derive the operation speed of the aerocraft through the following formula shown in the specification, wherein the method can accurately measure and calculate the operation speed of the aerocraft in a short time so as to favorably improve the measurement and control performance of the land station. The method is practically used for directly detecting the operation speed vector of a spacecraft. The method of the invention is simple and can also be directly applied to the passive positioning of a signal station under the condition that the central frequency of a target radiation signal is captured.

Description

technical field [0001] The invention belongs to the technical field of radio measurement, and in particular relates to a method for quickly detecting the velocity vector of a moving target in the air by a single measuring station based on Doppler frequency shift measurement. Background technique [0002] Simple direct use of the Doppler effect can only obtain radial velocity. usually. In three-dimensional space, in order to use a fixed single station to obtain the velocity vector of a moving target, it is necessary to measure the Doppler frequency shift of the target at least six times. [0003] Single-station rapid speed measurement has important engineering application significance. For example, for the problem of fast and accurate single-station measurement of spacecraft velocity, at least the observation area of ​​a single station is large, and there is no error caused by inconsistency of end-station equipment. For low-earth orbit satellites, the visible observation t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/10
Inventor 郁涛
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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