Aircraft target detection method under radar scanning mode in wind turbine clutter background

Abstract

The invention relates to an aircraft target detection method under a radar scanning mode in wind turbine clutter background. The method includes the following steps that: radar multi-scanning data of wind turbine clutter are obtained through utilizing apriori information, and the maximum Doppler frequency of wind turbine blades is estimated according to the data; super resolution technology is introduced for the obtained radar scanning data, so that frequency resolution can be improved; Hough transform is performed on radar echo data which have been subjected to super resolution processing, so that whether the wind turbine blades are vertical to radar beams can be detected, if the wind turbine blades are vertical to the radar beams, whether an aircraft target exists is further detected, otherwise, the possible Doppler frequencies of the tips of the wind turbine blades and the aircraft are estimated through utilizing the power spectrum of the radar echoes which have been subjected to the super resolution processing; the possible Doppler frequencies are compared with the calculated value of the Doppler frequency of the tips of the wind turbine blades; and whether the aircraft target exists in a range gate can be judged according to a comparison result. With the method of the invention adopted, a situation in which only wind turbine clutter exist and a situation in which aircraft and wind turbine clutter co-exists can be distinguished, and aircraft target detection under wind turbine clutter background with any blade initial angle can be realized.

Description

Technical field [0001] The invention belongs to the technical field of wind turbine clutter and aircraft target echo detection in a radar scan mode, and particularly relates to an aircraft target detection method under the background of wind turbine clutter in the radar scan mode. Background technique [0002] In order to cope with the problem of global warming, countries all over the world have a huge demand for clean energy. As a form of clean energy, wind power is currently receiving high attention all over the world. In recent years, the cumulative installed capacity of wind power in the world has shown an exponential growth trend. Studies have shown that wind turbines, as obstacles to tall movement, will adversely affect the nearby air traffic control surveillance radar. At this time, the wind turbine echo is regarded as a kind of clutter. The non-zero frequency component of the wind turbine echo caused by the rotation of the blade may cause the false alarm rate of the air...

AI Technical Summary

Problems solved by technology

Jia Qiongqiong et al. proposed CFAR detection based on dynamic clutter maps; Wu Renbiao et al. continuously used unit average selected small constant false alarm rate detection (SO-CFAR) technology to detect wind turbine clutter. engine echo at the same range gate

In addition, none of the above-mentioned wind turbine clutter detection technologies considers the following problem: if a wind turbine clutter is detected in a range gate, it is necessary to further determine whether there is an aircraft target in the range gate

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