Thrust Fluctuation Suppression of Electromagnetic Recuperator Based on DP-TPMSLM Principle

doi:10.12382/bgxb.2024.0800

Abstract

Abstract:

Considering the complex structure of existing recuperators,which often struggle to meet the real-time controllability requirements of recuperation process,this paper proposes an electromagnetic recuperator based on the principle of a double primary tubular permanent magnet synchronous linear motor (DP-TPMSLM).The differential equations governing the recuperation motion are established by analyzing the forces acting on each component during the recuperation process,and the magnitude of the required recuperator force is clarified.For DP-TPMSLM,the decoupling of cogging and end effects and the improvement in the end structure,the fundamental and second harmonics of the detent force are effectively suppressed,resulting in a significant reduction in thrust fluctuations,as verified by the experiments on a small-scale prototype.Furthermore,an electromagnetic recuperator based on the principle of DP-TPMSLM is proposed,and a co-simulation study is made on applying it to a vehicle-mounted artillery system.The experimental and simulated results demonstrate that the detent force of the improved DP-TPMSLM is reduced to 465.9N,which is educed by 34.4% decrease compared to that of the unimproved structure.Meanwhile,the proposed electromagnetic recuperator effectively achieves the real-time control of recuperation process,fundamentally addressing the issue of collision between the breech ring and the cradle.

Key words: artillery recuperator, linear motor, thrust fluctuation suppression, multi-primary structure, co-simulation

CLC Number:

TJ301

WU Qingle, LI Wenlong, XU Fengjie, WANG Liqun, YANG Guolai, TANG Enling. Thrust Fluctuation Suppression of Electromagnetic Recuperator Based on DP-TPMSLM Principle[J]. Acta Armamentarii, 2025, 46(7): 240800-.

Figures/Tables 25

Fig.1 Schematic diagram of the upper structure for a specify caliber artillery

Fig.2 Mechanical modeling of recuperation process

Fig.3 Measurement of viscous damping in eddy current brake

Fig.4 11p/12s primary structure

Fig.5 Finite element models of middle and end slots

Fig.6 Cogging forces analysis

Fig.7 Decoupling of end force and cogging force

Fig.8 Detent force analysis of the proposed structure

Fig.9 Detent force versus end structure

Fig.10 Detent force of the improved structure

Fig.11 Thrust curves under different current loads

Fig.12 Small-scale prototype experimental platform

Fig.13 Detent force of the proposed structure

Fig.14 Thrusts at different iq currents

Fig.15 Schematic diagram of electromagnetic recuperator

Fig.16 DP-TPMSLM main structure

Table 1 DP-TPMSLM main structural parameters

参数	数值/mm	参数	数值/mm
次级铁芯内径R_a	46	次级铁芯外径R_s	61
永磁体外径R_m	65.5	初级铁芯外径R_o	110
初级铁芯厚度h_s	10	端部齿高h_f	5.3
端部齿宽w_f	5.6	端部槽宽τ_f	8.9

Fig.17 DP-TPMSLM thrust curve

Fig.18 Vehicle-mounted artillery dynamics model

Fig.19 Schematic diagram of flexible barrel and its assembly

Fig.20 Co-simulation scheme

Fig.21 Recoil-recuperation displacement and velocity curves

Fig.22 Angular displacement and angular velocity curves along the vertical direction at the center of muzzle

Fig.23 Stability of the gun mount

Table 2 Performance comparison of different recoil systems

方案	后坐位移/ mm	复进到位速度/ (m·s^-1)	后坐-复进时间/%	稳定性
传统复进机	937.4	>0.10	0.80	稳定
电磁复进机	920.6	<0.005	0.78	稳定

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