弹射与阻拦一体式电磁弹射装置的电磁特性分析

Analysis of Electromagnetic Characteristics of an Integrated Electromagnetic Ejection and Arresting Gear

针对线性弹射装置占地面积大、结构复杂和质量大的固有缺点,提出一种单轴一体式钢索拖动新型电磁弹射和阻拦装置。装置由永磁储能电机、电涡流离合器、电涡流制动器和绕线轮等组成。介绍了装置的结构和工作原理。基于安培环路定理建立电涡流离合器和电涡流制动器的电磁理论模型。通过与三维有限元计算结果对比,分析电涡流离合器和电涡流制动器的电磁特性。通过制作的电涡流制动器的小型试验样机验证电磁理论模型的正确性和有效性,最终进行动力学分析。研究结果表明,该装置可以使30000 kg的飞机在2.1 s内从0 m/s加速到70 m/s,并能够使72 m/s的飞机在2.6 s停下,满足设计指标的要求。

In view of the inherent disadvantages of large footprint,complex structure and heavy weight of linear catapult device,this paper proposes an electromagnetic ejection and arresting gear with a single axis integrated steel cable drive.The gear consists of permanent magnet energy storage motor,eddy current clutch,eddy current brake and winding wheel.The structure and working principle of the gear are introduced.The 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 eddy current clutch and eddy current brake are analyzed.The correctness and effectiveness of the electromagnetic theoretical model are verified using a small-scale experimental prototype of the eddy current brake.Finally,a dynamic analysis of the electromagnetic ejection and arresting gear is conducted.The results indicate that the gear can accelerate a 30000 kg aircraft from 0 m/s to 70 m/s within 2.1 s.And it can also make a 72 m/s aircraft stop in 2.6 s,meeting the design requirements.