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A Method for Measuring Landing Aircraft Parameters Based on Dual Beam Radar

A technology for parameter measurement and aircraft, applied in radio wave measurement systems, measurement devices, radio wave reflection/re-radiation, etc., can solve problems such as the decrease in accuracy of beam center estimation and the impact on system estimation accuracy, so as to increase the number and increase the number of Effect of high Puler resolution and high estimation accuracy

Active Publication Date: 2021-11-16
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

At present, the center of gravity method is mainly used for beam center estimation accuracy. At large incident angles, the beam center estimation accuracy decreases significantly. In addition, the Doppler spread will also affect the beam center estimation accuracy of the system, which also affects the Doppler estimation accuracy at the beam center. larger

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  • A Method for Measuring Landing Aircraft Parameters Based on Dual Beam Radar
  • A Method for Measuring Landing Aircraft Parameters Based on Dual Beam Radar
  • A Method for Measuring Landing Aircraft Parameters Based on Dual Beam Radar

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Embodiment Construction

[0095] The basic principles of the present invention are as follows: 1) use the distance-Doppler dependence characteristic of the ground echo to back-calculate the motion parameters of the platform; The beam is narrower and the range beam is wider, thereby improving the Doppler resolution of a single range ring, increasing the number of range rings, and finally realizing accurate estimation of platform parameters.

[0096] Such as figure 1 Shown, the present invention comprises the steps:

[0097] (1) Process the radar echo data of the two beams installed on the aircraft that are perpendicular to each other and point to the ground, and construct the receiving data matrix X of the two radars 1 and x 2 .

[0098] It is a complex matrix with L rows and M columns, receiving data matrix X 1 The element x in row l and column m in 1 (l,m) is the l-th baseband signal sampling data of the m-th pulse of the first radar, and the receiving data matrix X 2 The element x in row l ...

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Abstract

A method for measuring parameters of a landing aircraft based on a dual-beam radar, the steps are as follows: (1) process the radar echo data of two beams mounted on the aircraft that are perpendicular to each other and point to the ground, and construct a receiving data matrix X 1 and x 2 ;(2) To receive data matrix X 1 and x 2 Carry out pulse compression, FFT and detection processing, obtain the distance-Doppler information of two radar echo data; (3) transform the distance-Doppler information of two radar echo data, construct corresponding data matrix; (4) Backcalculate the three-dimensional velocity and height of the landing aircraft according to the data matrix constructed in step (3); (5) Repeat the above steps to process the radar echo data within the next set of relevant processing time to obtain the real-time flight of the aircraft parameter. The present invention significantly reduces the system complexity of using four beams to measure the flight parameters of the lander in the existing landing radar, and can realize the measurement of the flight parameters of the aircraft only by using two beams, and the measurement accuracy of the aircraft parameters is high.

Description

technical field [0001] The invention relates to a method for measuring parameters of a landing aircraft based on a dual-beam radar, which can be directly applied to the estimation of flight parameters of various deep-space exploration landing platforms, and belongs to the field of aircraft parameter measurement. Background technique [0002] The existing landing radar flight parameter measurement mainly relies on single-beam speed measurement and distance measurement, and then according to the relative geometric relationship of multiple different beams, the flight parameter data of the lander is jointly estimated by using their respective measurement results. The accuracy of the flight parameter measurement radar of this system depends on two factors: the estimation accuracy of the beam center and the estimation accuracy of the Doppler velocity of the beam center. At present, the center of gravity method is mainly used for beam center estimation accuracy. At large incident a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/292G01S7/41G01S13/58G01S13/91
CPCG01S7/2923G01S7/415G01S13/58G01S13/582G01S13/91
Inventor 解虎党红杏李琪贺亚鹏张爱军李栓劳高飞
Owner XIAN INSTITUE OF SPACE RADIO TECH
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