Unlock instant, AI-driven research and patent intelligence for your innovation.

Improved Ridge Regression Based Clutter Suppression Method for Wind Turbine Weather Radar

A technology for wind turbines and weather radars, which is applied in the field of radar clutter suppression, can solve the problems of low fitting accuracy of meteorological signal spectral moment information, and achieves the effects of small fitting error, high-precision recovery, and high accuracy.

Active Publication Date: 2022-04-29
HOHAI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a weather radar wind turbine clutter suppression method based on improved ridge regression, which improves the low fitting accuracy of range Doppler regression (RDR) meteorological signal spectral moment information in polluted range units. question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improved Ridge Regression Based Clutter Suppression Method for Wind Turbine Weather Radar
  • Improved Ridge Regression Based Clutter Suppression Method for Wind Turbine Weather Radar
  • Improved Ridge Regression Based Clutter Suppression Method for Wind Turbine Weather Radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0060] A combined model of a three-bladed wind turbine such as figure 1 As shown, the coordinate system is established with the turbine blade axis O as the coordinate origin, the rotation plane of the turbine is the yoz plane, and the x-axis is perpendicular to the rotation plane. P is any scattering point on the blade, is the angle between the radar line of sight (LOS) and the turbine blades, β is the pitch angle between the radar line of sight and the z-axis, α is the angle between the projection of the radar line of sight on the xoy plane and the x-axis, that is, the radar line of sight is relative to Azimuth to the vertical plane of rotation. figure 2 The WTC Doppler spectrum when the coherent processing pulse number K=128 is given. It can be seen from the figure that the Doppler spectrum of the wind turbine base is around zero frequency, w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a weather radar wind turbine clutter suppression method based on improved ridge regression. The invention aims at the problem that when the data in the regression model has strong collinearity, the parameter estimation value is unstable and the estimation accuracy is low. Firstly, the weighted ridge regression model is introduced, and then generalized cross-validation (GCV) is used to obtain the optimal regression parameters in the ridge regression model, and then the spectral moment information of the meteorological signal polluted by wind turbine clutter (WTC) is obtained. The invention has high estimating precision and small calculation amount under the condition of low signal-to-noise ratio, and is easy for engineering implementation.

Description

technical field [0001] The invention relates to a weather radar wind turbine clutter suppression method based on improved ridge regression, and belongs to the field of radar clutter suppression. Background technique [0002] Studies have shown that wind turbines can cause significant interference to electronic equipment such as radar, communication and navigation. For weather radar, the existing clutter suppression technology cannot effectively suppress wind turbine clutter, and will cause the loss of original meteorological information, seriously affecting the prediction accuracy of meteorological information. Conventional wind turbine clutter suppression methods are mainly divided into two types—time domain and frequency filtering methods. Time-domain filtering considers ground clutter such as Doppler spectrum broadening caused by the internal movement of vegetation. The weather radar further introduces an adaptive processing method, that is, adaptively adjusts the positi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S7/41G01S13/95
CPCG01S7/023G01S7/414G01S13/958Y02A90/10
Inventor 沈明威吉雨姚旭王晓冬万晓玉
Owner HOHAI UNIV