ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Digital-twin-driven reliability domain analysis for aircraft landing gear systems
Received date: 2025-05-19
Revised date: 2025-06-10
Accepted date: 2025-07-01
Online published: 2025-07-15
Supported by
National Natural Science Foundation of China(52225211);Aeronautical Science Foundation of China(20230041053005);Northwestern Polytechnical University“1-0” Major Engineering Science Problem Project(G2024KY0613)
Aimed at the failure issues of aircraft landing gear systems caused by complex operating conditions such as high and low temperatures， this study proposes a reliability domain analysis method based on digital twin technology to achieve global parameter optimization and dynamic determination of reliability domain. First， a five-level digital twin framework is established， with the functionalities of each layer elaborated. Second， leveraging the high efficiency， robust balancing capability， and absence of control parameter requirements of the Coati Optimization Algorithm （COA）， an optimized Support Vector Machine （SVM） is developed， and a COA-SVM digital twin model is constructed. This model establishes functional mappings for three performance indicators： system efficiency， stroke， and overload. Subsequently， a population-interaction-enhanced COA is proposed to address the optimization challenges arising from high-dimensional parameter spaces formed by multi-failure modes under extreme temperatures， thereby determining the reliability domain of aircraft landing gear systems in low-temperature environments. Finally， a landing gear drop test incorporating temperature effects is conducted for validation. The established digital twin model accurately reflects the physical system and reveals that the failure probability of aircraft landing gear systems increases under low-temperature conditions. The proposed digital-twin-driven reliability analysis provides novel strategies and technical pathways for the optimal design of aircraft landing gear systems.
Yuqian ZHANG , Yongge LI , Xiaochuan LIU , Yong XU . Digital-twin-driven reliability domain analysis for aircraft landing gear systems[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(24) : 632256 -632256 . DOI: 10.7527/S1000-6893.2025.32256
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