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Radio echo signal simulation system adopting optical fiber to reduce error

A technology of echo signal and simulation system, which is applied in the direction of measuring devices, instruments, etc., can solve problems such as errors, and achieve the effect of realistic simulation and good versatility

Inactive Publication Date: 2013-12-11
JIANGXI HONGDU AVIATION IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the real spatial relative position relationship cannot be simulated on the ground, if the frequency offset technology is completely used, at high altitudes, a large error will occur

Method used

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  • Radio echo signal simulation system adopting optical fiber to reduce error
  • Radio echo signal simulation system adopting optical fiber to reduce error
  • Radio echo signal simulation system adopting optical fiber to reduce error

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Example: see figure 1 , figure 2 , image 3 .

[0017] A radio echo signal simulation system that uses optical fibers to reduce errors, the frequency-modulated continuous wave signal is sent to an optical transmitter, the optical transmitter is connected to an optical fiber, the optical fiber is connected to an optical receiver, and the optical receiver is connected to a power splitter connection.

[0018] It also includes an isolated single-pole multi-throw microwave switch, and the frequency-modulated continuous wave signal is sent to the optical transmitter after being gated by the isolated single-pole multi-throw microwave switch.

[0019] Basic principle of the present invention is:

[0020] The invention is based on the characteristic that the radio echo signal is a frequency-modulated continuous wave, and the difference caused by the error of the altimeter itself can be reduced through the optical fiber delay.

[0021] The frequency offset of the FM con...

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PUM

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Abstract

The invention relates to a radio echo signal simulation system adopting an optical fiber to reduce an error. A technology is applied to an aircraft ground semi-physical simulation test, can simulate an echo signal of a radio altimeter more really, and guarantees successful completion of the semi-physical simulation test. The radio echo signal simulation system adopting the optical fiber to reduce the error is characterized in that a frequency modulated continuous wave signal is transmitted to an optical sender; the optical sender is connected with the optical fiber; the optical fiber is connected with an optical receiver; and the optical receiver is connected with a power divider. The radio echo signal simulation system is good in universality; simulation of a multi-model radio altitude echo signal can be achieved in the aircraft ground test; and echo signal simulation of a frequency modulated continuous wave is more real and credible.

Description

technical field [0001] The invention relates to a radio echo signal simulation system that uses optical fibers to reduce errors. The technology is used for ground hardware-in-the-loop simulation tests of aircrafts and can more realistically simulate the echo signals of radio altimeters, ensuring the successful completion of the hardware-in-the-loop simulation test. Background technique [0002] Whether the performance of the radio altimeter meets the requirements of the overall technical indicators of the product needs to be tested and verified by various performance indicators. In the hardware-in-the-loop simulation test, it is necessary to assess whether the radio altimeter can normally respond to the command signal sent by the control system, and whether it can normally send and receive radio echo signals. Since the real spatial relative position relationship cannot be simulated on the ground, if the frequency offset technology is completely adopted, large errors will be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
Inventor 彭江军袁丹邹小霞王传礼宋佳科衷莉莎孙锐何雪伟黄桂明彭富国
Owner JIANGXI HONGDU AVIATION IND GRP
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