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QI L,YANG S,XIE Z Z,et al. Evaluation method for roughness of airport runway based on joint time-frequency analysis[J]. Journal of Beijing University of Aeronautics and Astronautics,2024,50(4):1110-1116 (in Chinese) doi: 10.13700/j.bh.1001-5965.2022.0459
Citation: QI L,YANG S,XIE Z Z,et al. Evaluation method for roughness of airport runway based on joint time-frequency analysis[J]. Journal of Beijing University of Aeronautics and Astronautics,2024,50(4):1110-1116 (in Chinese) doi: 10.13700/j.bh.1001-5965.2022.0459

Evaluation method for roughness of airport runway based on joint time-frequency analysis

doi: 10.13700/j.bh.1001-5965.2022.0459
Funds:  National Key R & D Program of China (2021YFB2600500);The Fundamental Research Funds for the Central Universities (3122019104)
More Information
  • Corresponding author: E-mail:qilin1208@vip.163.com
  • Received Date: 08 Jun 2022
  • Accepted Date: 19 Aug 2022
  • Available Online: 16 Sep 2022
  • Publish Date: 14 Sep 2022
  • Airport runway roughness is an important content of airport pavement evaluation. At present, the commonly used roughness evaluation methods can’t determine the distribution of unevenness on the runway, and can’t classify and evaluate the taxiing safety of different types of aircraft. In this paper, a runway roughness evaluation method based on joint time-frequency analysis is proposed. The parametric analysis method is used to statistically analyze the root-mean-square distribution characteristics of vertical acceleration at the aircraft’s center of gravity when the aircraft runs at different speeds on uneven runways with different amplitudes and wavelengths. This analysis is based on the three-degree-of-freedom dynamic model of the aircraft. The amplitude, wavelength of the uneven signal of the runway, and taxiing speed corresponding to the vertical acceleration root-mean-square of the center of gravity of the aircraft as 0.25g and 0.4g is calculated back, and the judgment surface of the aircraft taxiing safety vibration based on the frequency domain information of the uneven signal of therunway is established. In order to determine the wavelength and amplitude distribution surfaces of unequal signals at various points along the runway, a joint time-frequency analysis is conducted using the S transform method on the elevation of the airport runway.This paper analyzes the taxiing speed of the aircraft at different positions on the runway, and replaces the taxiing speed with the coordinate position, forming a taxiing safety vibration surface based on the frequency domain information of the uneven signal and the position of the runway. The runway roughness evaluation surface based on joint time-frequency analysis is obtained by superimposing with the surface obtained by the S transform. In contrast to other evaluation techniques, it is capable of assessing the degree of roughness at a given runway location and rating the roughness of the runway based on the kind of aircraft.

     

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