Keen Investigation of the Electromagnetic Scattering Characteristics of Tiltrotor Aircraft Based on Dynamic Calculation Method

Zhou, Zeyang; Huang, Jun; Chen, Chen; Zhang, Jiaren

doi:10.3390/photonics8060175

Cited by 3 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The key technologies and aerodynamic structural characteristics of unmanned aerial vehicles have been discussed (Che et al, 2017). The RCS results are compared with those of the method of moment (MOM) (Zhou and Huang, 2023a). The electromagnetic scattering characteristics of large objects with cracks have been analyzed (Nie et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Viewing electromagnetic scattering characteristics on air-brake of a stealth plane

Zhou,

Huang

2024

AEAT

View full text Add to dashboard Cite

Purpose This study aims to learn the dynamic radar cross-section (RCS) of a deflection air brake. Design/methodology/approach The aircraft model with delta wing, V-shaped tail and blended wing body is designed, and high-precision unstructured grid technology is used to deal with the surface of air brake and fuselage. The calculation method based on multiple tracking and dynamic scattering is presented to calculate RCS. Findings The fuselage has a low scattering level, and the opening air brake will bring obvious dynamic RCS effects to itself and the whole machine. The average indicator of air brake RCS can be lower than –0.6 dBm2 under the tail azimuth, while that of forward and lateral direction is lower. The mean RCS of fuselage is obviously higher than that of air brake, while the deflected air brake and its cabin can still provide strong scattering sources at some azimuths. When the air brake is opening, the change amplitude of the aircraft forward RCS can exceed 19.81 dBm2. Practical implications This research has practical significance for the dynamic electromagnetic scattering analysis and stealth design of the air brake. Originality/value The calculation method for aircraft RCS considering air brake dynamic deflection has been established.

show abstract

Section: Introductionmentioning

confidence: 99%

Viewing electromagnetic scattering characteristics on air-brake of a stealth plane

Zhou,

Huang

2024

AEAT

View full text Add to dashboard Cite

show abstract

Utilizing Dynamic Scattering for Learning Radar Cross-Section of a Flapping-Wing Aircraft

Zhou

Huang

2022

Photonics

View full text Add to dashboard Cite

To study the radar cross-section (RCS) of a flapping-wing aircraft, a method of flapping-wing dynamic scattering is presented. The aircraft has two rigid wings and a fuselage similar to a bird’s body, where the plane shape of the wing is U-type. The aircraft model is established and the pitching and flapping actions of the wing are simulated. The electromagnetic scattering characteristics of aircraft under two flight modes, different radar wave frequencies and observation angles are investigated. The results show that in the given gliding mode, the fuselage provides the main contribution to the lateral peak value. For the given forward azimuth range in the flapping mode, increasing the azimuth can reduce the mean and peak of the aircraft dynamic RCS curve, while increasing the elevation angle will increase the peak and mean of the aircraft dynamic RCS curve. In the flapping mode, the mean RCS of the aircraft in the lateral backward azimuth is significantly lower than that in the lateral forward azimuth. For the given tail azimuth range, the increase of azimuth will increase the mean and peak level of aircraft dynamic RCS curve. The presented method is effective to study the dynamic RCS characteristics of the flapping-wing aircraft.

show abstract

A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication

Dong

Wang

Xiang

et al. 2022

Sensors

View full text Add to dashboard Cite

Circular synthetic aperture radar (CSAR), which can observe the region of interest for a long time and from multiple angles, offers the opportunity for moving-target detection (MTD). However, traditional MTD methods cannot effectively solve the problem of high probability of false alarm (PFA) caused by strong clutter. To mitigate this, a novel, three-step scheme combining clutter background extraction, multichannel clutter suppression, and the degree of linear consistency of radial velocity interferometric phase (DLRVP) test is proposed. In the first step, the spatial similarity of the scatterers and the correlation between sub-aperture images are fused to extract the strong clutter mask prior to clutter suppression. In the second step, using the data remaining after elimination of the background clutter in Step 1, an amplitude-based detector with higher processing gain is utilized to detect potential moving targets. In the third step, a novel test model based on DLRVP is proposed to further reduce the PFA caused by isolated strong scatterers. After the above processing, almost all false alarms are excluded. Measured data verified that the PFA of the proposed method is only 20% that of the comparison method, with improved detection of slow and weakly moving targets and with better robustness.

show abstract

Keen Investigation of the Electromagnetic Scattering Characteristics of Tiltrotor Aircraft Based on Dynamic Calculation Method

Cited by 3 publications

References 29 publications

Viewing electromagnetic scattering characteristics on air-brake of a stealth plane

Viewing electromagnetic scattering characteristics on air-brake of a stealth plane

Utilizing Dynamic Scattering for Learning Radar Cross-Section of a Flapping-Wing Aircraft

A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication

Contact Info

Product

Resources

About