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Acta Aeronautica et Astronautica Sinica ›› 2025, Vol. 46 ›› Issue (14): 231491.doi: 10.7527/S1000-6893.2024.31491

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles    

Design of a foldable cross-medium amphibious aerial and underwater vehicle

Ni LI1,2, Weijia LUO1,2, Hao BAI1,2, Fei LIAO3, Changyin DONG1,2()   

  1. 1.School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China
    2.National Key Laboratory of Aircraft Configuration Design,Xi’an 710072,China
    3.Key Laboratory of Cross-domain Flight Crossover Technology,China Aerodynamics Research and Development;Center,Mianyang 621000,China
  • Received:2024-11-04 Revised:2024-11-19 Accepted:2024-12-09 Online:2024-12-31 Published:2024-12-30
  • Contact: Changyin DONG E-mail:dongcy@nwpu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52372398)

Abstract:

Cross-medium vehicles, capable of operating in both aquatic and aerial environments, have significant potential for applications in ocean monitoring, rescue operations, resource exploration, and environmental protection, making them valuable in a wide range of fields. This paper presents the design of a rotary-wing vehicle with foldable arms, codenamed “Feiyi”, which can operate in three distinct modes: underwater cruising, surface navigation, and aerial flight, with the ability to transition between air and water multiple times. In terms of overall design, “Feiyi” utilizes a rotary body structure to minimize hydrodynamic resistance during underwater motion and to reduce storage space when retracted. The vehicle features a propulsion system with four rotors at the front for flight control and four thrusters at the rear for underwater attitude and movement control. To optimize efficiency in both water and air, “Feiyi” adopts a horizontal posture for underwater navigation and a vertical posture for aerial flight, with attitude adjustments during medium transitions managed by a combination of thrusters. A prototype was developed and tested in various operational modes, including underwater navigation, surface cruising, cross-medium transitions, and aerial flight. The experiments demonstrated that “Feiyi” can achieve a flight altitude of 30 m with a height control precision of ± 0.1 m and an angular control precision of ± 0.5°, representing a significant improvement in control accuracy compared to existing vehicles.

Key words: cross-medium aerial and underwater, rotary body structure, quadrotor layout, foldable arms, underwater cruising

CLC Number: