Method for estimating rotor length and rotational speed of drone based on dual-emission and dual-receiving radar

A technology of aircraft rotor and radar, which is applied in the field of estimation of rotor length and rotational speed, and can solve problems such as slow speed, complex and changeable trajectory, and unsatisfactory results

Active Publication Date: 2018-12-07
BEIHANG UNIV
View PDF11 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low flying altitude, slow speed, and complex and changeable trajectory of the rotor-type UAV, the traditional low-altitude monitoring and identification methods are affected by strong ground clutter, and the effect is not ideal, while the identification method based on micro-Doppler information can Realize effective estimation of UAV rotor length and speed
[0005] The traditional Doppler radar consists of a transmitting antenna and a receiving antenna, which can only detect moving targets with radial velocity relative to the radar, but are insensitive to targets with only tangential velocity and insignificant radial velocity

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
  • Method for estimating rotor length and rotational speed of drone based on dual-emission and dual-receiving radar
  • Method for estimating rotor length and rotational speed of drone based on dual-emission and dual-receiving radar
  • Method for estimating rotor length and rotational speed of drone based on dual-emission and dual-receiving radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0062] For verifying the correctness of the present invention, carried out relevant emulation experiment, emulation experiment model is as image 3 As shown, where (x, y, z) is the rotor coordinate system, (X, Y, Z) is the radar coordinate system; P(t) represents the position coordinates of a scattering point. The simulation experiment parameters are as follows:

[0063] Table 1 Simulation experiment parameters

[0064]

[0065] The autocorrelation function of the coherent signal is as Figure 4 As shown, the micro-Doppler time-frequency characteristics of the coherent signal of the rotor are as follows Figure 5 As shown, the amplitude sum of all frequency components of the coherent signal at each moment is as follows Figure 6 As shown, the amplitude value of each frequency of the coherent signal at t=0.075s is as follows Figure 7 shown. Through calculation, the estimated results of the UAV rotor are: the length is 0.999m, the speed is 5.001r / s, and the estimation e...

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 relates to a method for estimating the rotor length and the rotational speed of a drone based on a dual-emission and dual-receiving radar, and belongs to the field of radar signal processing. The method includes: forming a beam alignment target by phase compensation of a transmitted signal to obtain a 3 dB transmission gain; collecting rotor echo signals by two receiving antennas, inputting the two echo signals into a coherent to obtain a coherent signal, and extracting a rotation half cycle of a rotor by an autocorrelation function of the coherent signal; performing short-time Fourier transform of the coherent signal to obtain the micro-Doppler time-spectrum characteristics of the rotor, and estimating the length and the speed of the rotor of the drone by using the difference of the frequency with the maximum amplitude at a specific moment. The method of the invention can accurately estimate the rotor length and the rotational speed of the drone, and provides a key technology for constructing the drone monitoring and identification system.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a method for estimating rotor length and rotational speed based on dual-engine and double-receive coherent radar. Background technique [0002] In recent years, with the maturity and popularization of drone technology, the number of drones, especially rotor-type civilian drones, has increased dramatically. While people are enjoying the convenience brought by drones, they are also increasingly worried about the urban safety issues caused by them. Therefore, how to effectively monitor and identify UAVs has become a key concern in the field of low-altitude security. The key to UAV monitoring and identification lies in the estimation of physical characteristic parameters such as rotor length and rotational speed. Therefore, the present invention designs a method for estimating the rotor length and rotational speed of the UAV based on the dual-transmitter and dual-...

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 Applications(China)
IPC IPC(8): G01S13/88G01S13/58G01B7/02
CPCG01B7/02G01S13/58G01S13/88
Inventor 王向荣王鹏程曹先彬
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap