bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on detection performance of millimeter wave fuze under rainfall condition
Authors: Tong Ao , Zhang Yao , Pan Liwen , Pan Xi 
Published: December 2024

Abstract
Aiming at the characteristics that the performance of millimeter wave fuze is easily affected by the natural environment, this paper studies the performance of millimeter wave fuze under rainfall conditions. By analyzing the theory of rain attenuation effect and backscattering effect, it is concluded that the rain attenuation effect reduces the received power of the signal, and the backscattering effect reduces the signal to interference plus noise ratio (SINR) of the receiving end. Based on this, the signal propagation path model under rainfall conditions is established. Finally, the variation of the maximum reliable detection range with signal wavelength and rainfall rate is simulated under different SINR requirements, and the variation of signal to noise ratio (SNR) and SINR with rainfall rate is compared under different distances. The simulation results show that both the rain attenuation effect and the backscattering effect lead to the decrease of the maximum reliable detection distance of millimeter wave fuze. With the increase of rainfall rate, the detection performance of millimeter wave fuze decreases, and the detection distance decreases by about 23.2 % under extreme conditions. The rain backscattering effect on millimeter wave fuze is higher than its attenuation effect, and the influence of rain backscattering effect on millimeter wave fuze increases with the increase of detection distance. When the detection distance increases from 15 m to 30 m, the difference between SNR and SINR at the receiving end of millimeter wave fuze increases by about 3 times. This study has important reference significance for the application of millimeter wave fuze in precision guided weapons.
Analysis of the Response Characteristics of Ultra-Wideband Radio Fuze to Interference Signals
Authors: Hao Shijun , Xie Jialiang , Liang Yanbin , Wu Kaiwei , Yang Bing 
Published: December 2024

Abstract
The response characteristics of the fuze to the interference signal with reasonable characteristic parameters are similar to the real echo signal, which may lead to the confusion of signal processing and recognition system. To solve this problem, this paper analyzes the influence of characteristic parameters of interference signal on the response characteristics of fuze in detail from two perspectives of time domain and frequency domain, Based on the analysis of receiver principle, the amplitude-frequency response model of sampling integral differential circuit is established, and the response characteristics of interference signal are analyzed from the perspective of frequency domain. Based on the analysis of the time-frequency characteristics of the echo signal of the UWB fuze, a time-frequency function cutting method is proposed to evaluate the anti-jamming performance of the UWB fuze. This methodology was applied to the evaluation of the anti-jamming performance of the UWB fuze to sinusoidal amplitude-modulation interference signal and the results show that the theoretical analysis and simulation results are consistent, and the research provides theoretical guidance for the anti-interference of fuze.
Dynamic Analysis of Four-wing Butterfly Chaotic System
Authors: Nie Min , Wang Kangjian , Liu Yongzhi , Fan Bingjie , Li Tianxing , Zhu Peirong 
Published: December 2024

Abstract
To further explore the dynamic behavior in high-dimensional chaotic systems, the complex four-wing butterfly folding phenomenon was discovered based on the Qi system. The results indicate that η will make the Qi system evolve from four vortex structure to a complex wing butterfly folding case. The complex four-wing butterfly folding system were analyzed using tools such as the phase trajectory, time-domain waveform, equilibrium point, bifurcation diagram, and maximum Lyapunov exponent spectrum. Finally, the synchronization control of the system was studied using adaptive control based on stability theory. The stability of the controller was proved using Lyapunov analysis. The results showed that the controller could achieve synchronization of the system in about 3 steps. The discovery of the phase structure will provide more means for the encryption application of Qi system.
A Study of the Ammunition Base of Missile and Gun Combined Weapons
Authors: Tianfeng Fan , Yinhe Li 
Published: December 2024

Abstract
In the process of fighting against the enemy, the ammunition base was an important concept, which had an important effect on the combat mission, and even changed the battlefield situation, however, the early ammunition base was generally estimated by a coarse method based some data, it was lacked of the system research. As to this condition, this paper analysed the influence factors of the ammunition base, and proposed the prediction model of the ammunition base by using the ISM method and the DEMATEL method, and the prediction model of the ammunition base was established, then applied this method in ammunition base of missile and gun combined weapons, the result shows that the ammunition base of missile and gun combined weapons can satisfy the typical combat demand of the weapon.
Application of the damping bag on supersonic rocket sled tests
Authors: Fu Liang , Zeng Yi , Yang Yang , Han Guangbin 
Published: December 2024

Abstract
In recent years, ground-based ultra-high-speed systems such as high-speed rocket sled and super-high-speed railways have become a research hotspot, especially the rocket sled which can currently exceed March 8 in top speed. However, due to the non-perfect smoothness of the slide and the complex aerodynamic environment, the rocket sled has a serious impact on the test articles or test instruments on the rocket sled. Therefore, it is necessary to use vibration isolation facilities to reduce the vibration on the rocket sled. In this work, a vibration damper based on the 4 damping bags with high efficiency damping effect for high-frequency vibration is design. The FEM simulation, vibration table experiments and a supersonic rocket sled test are design to demonstrate the attenuation effect of the vibration damper. All results show the vibration damper can isolate elastic waves in the frequency range from 400 Hz to 2000 Hz.
Research on Digital UAV Test Methods
Authors: Xin Wei , Yan Wang , Yifu Zhuang 
Published: December 2024

Abstract
With the rapid advancement of artificial intelligence technology, the role of unmanned aerial vehicles testing and identification in the process of unmanned aerial vehicles development has become increasingly crucial. This article studies the digital definition of unmanned aerial vehicles testing and identification, the reasons for digital transformation, the connotation of digital transformation, and the capabilities within digital transformation, forming a relatively complete methodology for digital transformation in the field of unmanned aerial vehicles testing and identification, This provides a theoretical reference for the direction of digital transformation in unmanned aerial vehicles testing and identification.
Research on Digital Prototype Model Design of Missile Electrical System
Authors: Hang Xu , Hao Sun , Tianyao Zhang , Yi Lu , Huijie Duan , Nian Zhao 
Published: December 2024

Abstract
The design of missile electrical systems involves various aspects such as electrical network, wiring harness connection relationships, wiring harness layout, and electromagnetic compatibility design. Traditional design methods cannot meet the design requirements of missile electrical systems due to many drawbacks. In this paper, a method to design digital prototype model is proposed. The digital prototype model consists of two parts: the design of cable electrical model is based on Capital and the design of cable structure model is based on NX. And the Digital Prototype model is archived by linking these two parts, which provides a guidance for cable manufacturing and production and laying a good foundation for future research.
Research on the recoil reduction efficiency of a recoilless launch gun with high projectile velocity
Authors: Liu Pengzhan , Jin Wei , Shi Zhiyu , Wang Yong , Zhao Xiongfei 
Published: December 2024

Abstract
Recoilless launch can improve the adaptability of unmanned platforms to weapons by eliminating recoil, but it has the disadvantage of reducing the initial velocity of the projectile. The initial velocity of the recoilless gun can be improved by increasing the charge mass, so research into the recoilless efficiency of recoilless firing with increasing charge mass is of great importance for future applications of recoilless weapons. Based on the combustible cartridge and induction ignition, the one-dimensional homogeneous flow internal ballistic of a recoilless gun with high initial velocity is established. The effect of the Laval nozzle diameter on the efficiency of the recoilless gun is then investigated. The results show that, compared to conventional guns, the recoil can be reduced to 1N-s without reducing the initial velocity of the projectile. A ballistic test on a slide-rail mount is carried out to verify the results of the analysis. The results should make an important contribution to the development of a recoilless rifle.
Investigation on the performance parameters of a blasting rarefaction wave low recoil gun
Authors: Jian Wang , Ziyi Luo , Cheng Cheng 
Published: December 2024

Abstract
The protection performance is needed higher and higher in the development of a modern war. However, with the increase of the projectile kinetic energy, the recoil will increase as well, which brings disadvantages in the gun weapon systems. In this paper, a new recoil gun with a blasting device based on the rarefaction wave is developed to meet the demand of reducing the recoil without loss of the kinetic energy. The physic process of the rarefaction wave gun is studied by a two-phase flow model of interior ballistics. Then the effects of nozzle structure parameters of the low recoil gun are investigated. Based on the study of parameters, an optimized nozzle structure is given. The muzzle velocity reduces only 0.61% and the recoil impulse reduces by 38.5%. The study provides a theoretical direction for the development of low recoil gun weapon.
Application and Research Progress of Reconfigurable Modular Turret for Artillery: A Review
Authors: Meng Fanzhe , Tian Yafeng , Wang Huating , Chen Chen , He Fan , Kou Yu , Zhang Yao 
Published: December 2024

Abstract
Artillery has become a vital component of modern military arsenals due to its high operational cost-effectiveness. The modularized turret is of great significance for artillery, as it improves the applicability of combat scenarios and the efficiency of logistic maintenance, while reducing the overall cost of maintenance throughout the weapon’s lifespan. This paper begins by defining a re-configurable modular turret and then proceeds to present the latest developments in turret modularization around the globe, with a particular focus on their current applications in the field of artillery. Secondly, the research trend of the reconfigurable modular turret is reviewed in terms of the ammunition supply system, the overall structural design, and the optimization of artillery. Finally, the key technologies of modular turrets are discussed in order to provide a reference for the development of reconfigurable modular turrets.
Simulation Research on the Control of Firing Stability of a New Generation Large-caliber Gun with Liquid-gas Composite Standing Hoes
Authors: Liu Huan , Huang Qiao Gao , An Cai Yun , Liu Peng Ke , Qi Xiao Bin , Zhang Shao Bin , He Qi 
Published: December 2024

Abstract
Both wheeled and tracked guns will show different forms of body vibration when firing, which seriously affects shooting accuracy. Therefore, in order to reduce the vibration as far as possible, a new generation large-caliber gun is equipped with a liquid-gas composite standing hoes, by adjusting some parameters, the vibration of the gun body can be reduced to a great extent, so as to improve the shooting accuracy. The dynamics simulation model of vehicle-gun with liquid-gas buffer standing hoes was established. Taking the inner diameter of the accumulator damping hole as the optimization objective, three inner diameters were selected for comparative study. the influence of the damping hole diameter on the firing stability and the ground support force of the standing hoes under the firing state of azimuth 0°、 altitude 0° and azimuth 30°、altitude 30° were investigated. The results show that the inner diameter of the accumulator damping hole is proportional to the maximum pitch angle of the vehicle body and inversely proportional to the support force of the standing hoes under different firing states. In order to comprehensively consider shooting stability and the force of the standing hoes, the inner diameter of the accumulator damping hole is 5mm as the optimal choice.
Failure analysis of semiconductor bridge component in humid and hot environment
Authors: Xie Rui Zhen , Li Ming , Fu Pei , Zhang Jing Xin , Bai Bing , Cheng Ni , Yao Hong Zhi 
Published: December 2024

Abstract
In order to solve the problem of failure during the storage of semiconductor bridge initiating explosive devices, the alternating humid and heat test of semiconductor bridge component was carried out according to GJB5309.30-2004 test method for initiating explosive devices -part 30: Humid and heat test. The semiconductor bridge component was characterized by means of resistance measurement, microscopic characterization, energy spectrum test, roughness test, etc. The resistance at the wires showed that the failure rate of Sample 1 and Sample 2 were 11% and 88%, respectively after 28 days of alternating humid and heat test, and the resistance of the failed sample at the solder pads did not change. The scanning electron microscope and energy spectrum test results show that there is significant corrosion at the wires end, and the component such as Fe, Co, Ni appeared at the wire end after the humid and heat test. The roughness test results show that the surface roughness of sample 1’s wire is smaller than that of sample 2. These indicate that the failure mode of semiconductor bridge components in humid and heat environments is atmospheric corrosion, and the surface state of the wire affects their failure efficiency.
Damage and Fracture Behaviour of Bearing Beam for the PyroMEMS Safe and Arming (S&A) Device
Authors: Wei Liu , Ren Xiao-Ming , Liu Lan , Chu En-Yi , Zhang Hai-Ying 
Published: December 2024

Abstract
A novel PyroMEMS safe and arm device (S&A) by using torsion spring to lock the slider are presented, and the S&A device is composed of an igniter layer, an actuation layer and a lid layer. Due to strength of the bearing beam determined the arming process of PyroMEMS S&A device, a simulation model was built by using commercial explicit dynamic software to calculate damage and fracture behaviour of the bearing beam. Critical sizes of the bearing beam were computed under different conditions. The results showed that damage behaviour between the normal and necked-shape bearing beams were quite different, and the double-beam structure could not realize the arming function compared to the single-beam structure. The critical fracture pressure increased from 62.5MPa ± 2.5Mpa to 102.5MPa ± 2.5Mpa, as the width of normal bearing beam increased from 100μm to 150μm. Only if the width of normal bearing beam was less than 149.4μm, or the angle β of necked-shape bearing beam was greater than 3.4°, the bearing beam could be broken to release the slider and furtherly realize the arming function. It is of vital importance to guide the design of PyroMEMS S&A device.
Analysis of mechanical properties of copper tantalum alloy material
Authors: Hong Bihui , Li Wenbin , Zhu Wei , Li Yiming , Chen Peng 
Published: December 2024

Abstract
Alloy material is one of the important factors affecting the penetration ability of shaped charge warhead. It is of great significance to study the mechanical properties of copper-tantalum alloy material for its application in shaped charge warhead. The mechanical tests of alloy materials at different temperatures and different strain rates were carried out by material universal testing machine and split Hopkinson pressure bar. The experimental results show that under quasi-static compression and dynamic compression, the plastic flow stress of Cu-40Ta material increases with the increase of strain rate, and has significant strain hardening effect. The plastic flow stress decreases with the increase of temperature, and there is thermal softening effect. The yield strength increases with the increase of strain rate, and the material has obvious strain rate strengthening effect.
PD Proportional Guidance Method for Strapdown Guided Air-to-ground Missile
Authors: Wang Dong , Zhao Yangyang 
Published: December 2024

Abstract
Aiming at the problem that the guidance accuracy of strapdown guided air-to-ground missile is poor and it is difficult to meet the demand of precise strike to ground target, a design method of strapdown guided PD proportional guidance law is proposed. Firstly, an improved α–β–γ filtering method is designed to estimate the angular velocity of line of sight(LOS) and angular acceleration of LOS of strapdown guidance. Then, the PD proportional guidance method is formed by using the estimated angular velocity of LOS and angular acceleration of LOS. Finally, the simulation compares the proportional guidance law based on the estimated angular velocity of LOS with the PD proportional guidance law based on the estimated angular velocity of LOS and angular acceleration of LOS. The simulation results show that the proposed PD proportional guidance law can effectively improve the strapdown guidance accuracy.
Research on Top-Down design of launcher fairing mechanism equipped on Air-to-Ground missile carried by UAV
Authors: Pang Yu , Li Zeyang , Zhang Qi , Yu Lei , Yang Li , Xu Yangyang , Liu Ruiqing 
Published: December 2024

Abstract
Reconnaissance/Strike Unmanned Aerial Vehicle (UAV) is advanced strike unmanned equipment with long range. Tube-launched technology is one of the commonly used launch technologies for air-to-ground missiles carried by UAVs. Traditional launchers sealed by sealing film have disadvantages in aerodynamic characteristic and launch safety, restricting the combat effectiveness of UAVs. In this article, the influences of airspeed and aspect ratio on aerodynamic characteristics of fairing are studied based on CFD. The relationship between the aerodynamic drag torque and the open angle of fairing is established. A top-down design method of fairing mechanism is proposed which is capable of reducing aerodynamic drag, opening transmission path and being reset automatically. The virtual prototype of the fairing mechanism is built and mechanical dynamics analysis is carried, verifying the rationality and feasibility of the design. The effects of the fairing mechanism on the lift-drag ratio and the range of one advanced reconnaissance/Strike UAV is displayed that the values are improved by 15.2% and 613 km, respectively.
Research on cavity evolution and motion characteristics of supercavitating projectiles during asynchronous parallel water entry
Authors: Qi Xiaobin , Wang Rui , Li Ruijie , Lu Lin , Wang Jiawen 
Published: December 2024

Abstract
To study the performance of supercavitating projectiles in asynchronous parallel entry into water, this paper establishes a numerical simulation method for supercavitating projectiles in asynchronous parallel water entry based on finite volume method, VOF multi phase flow model, and overlapping grid technology. At the same time, high-speed cameras and light gas guns were used to conduct high-speed water entry experiments on a single projectile, and the reliability of the numerical method was verified by comparing simulation results with experimental results. Subsequently, numerical simulations and analyses were conducted on the cavity evolution and motion characteristics of the front and rear projectiles under different initial spacing and different water entry sequences. The research results indicate that when the initial distance between the front and rear projectiles is 0.5 times the length of the projectile, the front projectile is unable to generate complete cavities to wrap the projectile body due to severe compression from the rear projectile, which seriously affects its movement and ultimately leads to instability. As the initial spacing increases, the influence of the rear projectile on the surrounding cavities of the front projectile weakens. Whether the upper projectile enters the water first or the lower projectile enters the water first, both move smoothly. For the rear projectile, due to the continuous effect of the front projectile cavity, its cavity is always asymmetric, and its motion stability is affected. When the spacing is 0.5 times the length of the projectile, the rear launched projectile deflects inward and becomes unstable. When the spacing is 1 time the length of the projectile, it moves steadily. When the spacing is 2 and 3 times the length of the projectile, it deflects outward and becomes unstable. Regardless of which projectile enters the water first, this motion pattern is basically consistent.
Experimental investigation of mechanical responses of helmeted headforms under the ballistic impact
Authors: Harmukh Atul , Ganpule Shailesh 
Published: December 2024

Abstract
Ballistic impact induced head injury is a massive concern in contemporary asymmetric warfare. The performance of the ballistic helmets and the associated mechanical responses of headforms against ballistic impact are highly sought. The ballistic assessment of the helmet is traditionally evaluated based on the perforation of the helmet and back face deformation (BFD) of the helmet. However, the link between BFD and head injury remains unclear. Toward this end, we have investigated the mechanical responses (BFD, head kinematics (linear and angular)) using rigid headform and flexible headform under the ballistic impact with using 9 mm bullet (bullet velocities: 430 ± 15 m/s). The front, oblique (30o̱ to the sagittal axis), right, back, and left orientations were considered for the ballistic impact. Our results indicate that the flexible headform influenced head kinematics significantly, although the differences in BFD between the rigid and flexible headforms were minimal. Overall, these findings offer insights and new data on the ballistic performance of helmeted headforms. This information is crucial for designing and developing next-generation helmets and for improving testing protocols to better evaluate the effectiveness of ballistic helmets.
Study on the Influence of Combustible Cartridge Force of Propellant on the Pressure Wave of Modular Charge
Authors: Guo Yinghua , Li Ruijing , Dong Yancheng , Chen Pengjie 
Published: December 2024

Abstract
In order to study the influence of the change of force of propellant of combustible cartridge case on the interior ballistic performance of gun, the combustion performance tests of four combustible cartridge case formulations were carried out, and the pressure-time curve of actual combustion process was obtained. On this basis, the combustion law of combustible cartridge cases with different force of propellant is obtained, and the combustion law is introduced into the two-phase flow simulation model of modular charge, and the influence law of combustible cartridge case force of propellant change on the pressure wave in the interior ballistic process of gun launching module charge is obtained by simulation. The research results have certain reference value for improving the design of combustible cartridge case with large-caliber modular charge.