Abstract: Aiming at the inherent disadvantages of large footprint, complex structure and heavy weight of the linear catapult device, this article proposes a new type of electromagnetic launch and arresting gear with a single axis integrated steel cable drive. The gear consists of the permanent magnet energy storage motor, the eddy current clutch, the eddy current brake, and the winding wheel. Firstly, the structure and working principle of the device are introduced. Electromagnetic theoretical models of eddy current clutches and eddy current brakes are developed based on the Ampere loop theorem. By comparing the results with 3-D finite element calculations, the electromagnetic characteristics of the eddy current clutch and eddy current brake are analyzed. The correctness and effectiveness of the electromagnetic theoretical model are verified through a small-scale experimental prototype of the eddy current brake produced. Finally, a dynamic analysis is conducted. The results indicate that the device can accelerate a 30 000 kg aircraft from 0 m/s to 70 m/s within 2.1 s. And it can also make the 72 m/s aircraft stop in 2.6s, meeting the design requirements.

Key words: electromagnetic ejection and arrest, eddy current clutch, eddy current brake, ampere circuital theorem, electromagnetic characteristics