2014 17th International

Symposium on ElectromagneticLaunch Technology

(EML 2014)

San Diego, California, USA

7-11 July 2014

IEEE Catalog Number: CFP14EML-POD

ISBN: 978-1-4799-2734-0

LIST OF PAPERS

2014 17th EML Introduction

2014 Peter Mark Award

2014 Peter Kemmey Memorial Student Scholarship2014 Harry Fair Award

Tribute to Drs. Henry Kolm and Richard Marshall

APPLICATIONS

I A Scenario for a Future European Shipboard RailgunStephan Hundertmark and Daniel Lancelle

5 Design Considerations for an Electromagnetic Railgun Firing Intelligent Bursts to be Used

Against Anti-Ship Missiles

Johan Gallant, Tom Vancaeyzeele, Ben Lauwens, Barbara Wild, Farid Alouahabi, and Markus Schneider

II The Use of a Railgun Facility for Dynamic Fracture of Brittle Materials

Markus Schneider, Gregory Vincent, James Hogan, John Spray

ARMOR

16 Simulation Research of the Enhancement Effect on Shaped-Charge Jet by Using Axial

Magnetic Fields Luo Youtian, Li Zhiyuan, and Lei Bin

21 Research on the Necking Effect of Pulse Current on Shaped-charge Jet in Passive

Electromagnetic Armor WenDa Qi, Bin Lei, ZhiYuan Li, Xi-Chao Yuan, He Li

27 Calculation and Verification of Lateral and Pinch Electromagnetic Action on the Shaped

Charge Jet in the Passive Electromagnetic ArmorShaohui Chen, Fan Zhang, Manna Zhou, Ben Liu, Changming Chen, and Lizhen Xu

34 Optimization Research of Passive Electromagnetic Armor Plate Spacing Based on Electro-

Explosion Li Zhiyuan, Luo Youtian, Lu Pin, Xiang Hongjun, Dong Jiannian

39 Research of the Electrothermic Action on Shaped Charge Jet in the Passive ElectromagneticArmor Lei Bin, Yuan Xichao, Li Zhiyuan, Chen Shaohui

45 A Frequency Domain Method for the Pulse Current Skin Effect in the Passive

Electromagnetic Armor Xichao Yuan, Bin Lei, Zhiyuan Li, Wenda Qi

51 Research on Bending and Deviating Effects of Passive Electromagnetic Armor on Shaped-charge Jet Bin Lei, WenDa Qi, ZhiYuan Li, Ping Lu, He Li

56 Optimization of the Spacing between the Two Plates of Passive Electromagnetic Armor

Huang Yongfang, Cao Yanjie, Zhou Gang, Sun Xijing

62 Research on Performance Affected by Material Changing of Pedestal and Interception

Projectile in the Active EM Armor Wang Chengxue, Shumei Cui, Cao Yanjie, Wang min

67 Effect of Electric Current on Shaped-Charge OperationG. A. Shvetsov, A. D. Matrosov, and S. V. Stankevich

COILGUN

75 Design and Optimization of Single Phase Tubular Switched Reluctance Linear Launcher

H. Chen, X. Liu and T. Xu

81 Analysis of Parameter Sensitivity for Induction Coil Launcher Based on Orthogonal

Experimental Method Hongjun Xiang, Bin Lei, Zhiyuan Li, KeyiZhao, Qingao Lv, Qian Zhang, Yiqing Geng

86 Acceleration Characteristics in the Launching of Induction CoilgunHongjun Xiang, Bin Lei, Zhiyuan Li, Chunyan Liang, KeyiZhao, Qingao Lv, Qian Zhang

90 Double Closed-loop Control of Switched Reluctance Linear Launcher

H. Chen, Q. Wang and X. Zhang

96 A Fault Tolerant Control Strategy for Six-phase Transverse Flux Tubular PMLM Based on

Synthetic Vector Method Hao Yan, Yongxiang Xu, Shanlin Jiang, Jibin Zou, and Weiyan Liang

103 Electromagnetic Force Characteristics in Long-stator PM Linear Launcher with Non-ideal

Mechanical Air gap Condition Mingna Ma, Liyi Li, He Zhu and C. C. Chan

107 Thermal Optimization of a Tubular Permanent Magnet Linear Synchronous Motor

Huang Xuzhen, Tan Qiang, Li Liyi, Zhou Bo

113 Design and Analysis of the Secondary Structure for the Slot-less Tubular Permanent MagnetLinear Synchronous Motor Xu Zhen Huang, Qing Long Wang, Li Yi Li, Bo Zhou

118 Influence of Magnetic Structure on Electromagnetic and Dynamic Properties for

LPMBLDCM Huilai Li, Xiaomin Li, KeyiZhao, Zhiyuan Li, and He Li

124 Optimum Design of Driving Circuit Parameters for Magnetic-resistance Coil Launcher

Zhao Keyi, Xiang Hongjun, Li Zhiyuan, Lei Bin, Zhang Qian, Song Liwei, LiJinming

129 Research on Interstage Magnetic Couple Effect of LCICL

Zhao Keyi, Xiang Hongjun, Li Zhiyuan, Lei Bin, Zhang Qian, Song Liwei, Li Huilai, LiJinming

133 Analysis of Back Electromotive Force in RCEML

.... Yanpan Hou, Zhenxiang Liu, Lijia Yang, ZhiShen, Jian-Ming Ouyang, Dong Yang, Zhi-Peng Lin andXiang-cheng Li

139 Dynamic Research of Multi-stage Reluctance Coil Gun

Li Zhiyuan, Luo Youtian, Meng Xueping, Xiang Hongjun, Cui Shumei

143 Research on Energy Conversion Efficiency of Helical Coil Electromagnetic Launcher

Dong Yang, Zhenxiang Liu, Yang Li-jia, Shen Zhi, Ouyang Jian-ming, Hou Yan-pan

148 High-Bandwidth Current Control for High-Speed Linear Motor

Mingyi Wang, Liyi Li, He Zhu andJiaxi Liu

152 Modeling and Analysis of a Magnetically Levitated Synchronous Permanent Magnet Planar

Motor with Concentric Structure Winding Lu Zhang, Baoquan Kou, Feng Xing, andJun Luo

158 Design and Evaluating the Driving Coil on Induction CoilgunTao Zhang, Wei Guo, Zizhou Su, Ren Ren, Mingtao Li, Junyi Yang, Bin Cao, andJuxiang Li

164 Efficiency Optimization of Multi-Stage Synchronous Induction Coil Launcher Based on

Response Surface Methodology HongboJin, Yanjie Cao, Huijin Wang, and Yongfang Huang

169 Research on the Scaling Model Experiment of Electromagnetic Coil Launcher

Zou Bengui, Cao Yanjie, Jin Hongbo, Wang Min

174 Multi-level and Multi-objective Optimization of Coilgun Considering Temperature Rise

Xi Tao, Shuhong Wang, Youpeng Huangfu and Yuqiong Wang

180 Characteristic Analysis of An Ironless Linear Synchronous Motor with Novel Halbach

Magnet Array Lu Zhang, Baoquan Kou, Feng Xing, and Binchao Zhao

185 Design and Analysis of a Bidirectional Cross-Linking Transverse Flux Permanent Magnet

Synchronous Motor He Zhang, Baoquan Kou, Weiduo Zhao, and Guolong Yang

191 Multi-Objective Optimal Design of Switched Reluctance Linear Launcher

Shoujun Song, Man Zhang, Lefei Ge and Lusheng Wang

197 Trigger Control Research of Electromagnetic Coil Launcher Based on Real-time VelocityMeasurement Min Wang, Yanjie Cao, Jialin Chen, Chengxue Wang

202 Design Considerations of Transverse Flux Linear Machines for Eelectromagnetic Launch

Applications Qian Wang, Bo Zhao, Juan Zhang, Yong Li, andJibin Zou

208 Analysis of Temperature Distribution on Power Converter for Switched Reluctance Linear

Launcher H. Chen, and Y. Xu

214 Exploration and Verification Analysis of a Linear Reluctance Accelerator

Thor Barrera, Robby Beard

220 Nonlinear Control of Axial Flux Flywheel Motor/Generator Set of Coil Launchers

Ugur Hasirci

225 Research on a New Accurate Thrust Control Strategy for Linear Induction Motor

Xu Qiwei, Cui Shumei, Zhang Qianfan, Song Liwei, and Xiyuan Li

230 Modelling of a Coilgun-based Plate Launcher for Active Armour ApplicationsAnders Larsson, Mose Akyuz, PatrikAppelgren, Wilhelm Dingertz and Tomas Hurtig

236 Helical Electromagnetic Launchers for Acceleration Calibration f. J. Timpson and T. G. Engel

241 Development of a Reversible Helical Electromagnetic Launcher

T.G. Engel, M. J. Veracka, and E. J. Timpson

245 Progress in the Development of a Large-Bore High-Velocity Helical ElectromagneticLauncher T.G. Engel and E. J. Timpson

247 Reversible Helical Electromagnetic Launchers for Time Acceleration Waveform ReplicationE.J. Timpson and T. G. Engel

250 Design of Linear Thruster with a Solid Arc-shaped Mover Used by Tanker Aircraft

Chai Feng, Bi Yunlong, Liang Peixin, Song Liwei

256 Effect of Air Gap Eccentricity on Rotor Eddy Current Loss in High Speed PMSM Used in

FESS* Pei Yulong, Li Xing, Li Yi, Chai Feng

262 Investigation ofArmature Capture Effect on Synchronous Induction CoilgunTao Zhang, Wei Guo, Zizhou Su, Juanjuan Yue, Honghai Zhang, Wei Fan, and Xiaochao Sun

268 Synchronous Control of Dual Linear Motors Based on Advanced Space Voltage Vector

Switch Table Baoquan Kou, Feng Xing, Chaoning Zhang, Lu Zhang, and Hao Yan

273 Gyroscopic Stabilization of the Armature in a Travelling Wave Induction Launcher

A. Musolino, M. Raugi, R. Rizzo, L. Sani, and E. Tripodi

278 Research on Transverse End Effect of Linear Induction Motor for High-Speed Industrial

Transportation Junyong Lu, Xiao Zhang, Baoguo Liu, Xiaocun Guan, Sai Tan,Weiming Ma, Sengyi Song

283 Inductances and Phase Coupling Analysis of Tubular Permanent Magnet Machines with

Transverse Flux Configuration Qian Wang, Bo Zhao, Yongxiang Xu, Juan Zhang, andJibin Zou

288 Passive MAGLEV Armature Stabilization

Dante Casini, Antonino Musolino, Marco Raugi, Rocco Rizzo, and Ernesto Tripodi

293 Theory and Circuit model of Brush Commutation in Helical Coil Electromagnetic Launchers

.... Yanpan Hou, Zhenxiang Liu, Lijia Yang, ZhiShen, Jian-Ming Ouyang, Dong Yang, Zhi-Peng Lin andXiang-cheng Li

COMPUTATIONALTECHNIQUES

300 Electromagnetic Field Effect and Analysis of Composite Structure

Jerome T. Tzeng and Kuo-Ta Hsieh

305 Numerical Analysis of the Response of Thick Wires to Extreme Dynamic Electro-Mechanical

Loads R.J.M. Cunrath and Dr. M. Wickert

311 Analysis and Simulation on Pulse Current Distribution in Copper Strips

Yan-chang Xing, Qing-ao Lv, Zhi-yuan Li, Ren-gui Zhu, and Long-wen Jin

318 Analysis of the Launching Performance under Melting Restriction for ElectromagneticLauncher Yan-chang Xing, Qing-ao Lv, Zhi-yuan Li, Hong-jun Xiang

323 Transient Dynamic Analysis of Distributed Energy Storage Electromagnetic Launcher UsingFinite Element Method L Yang, J. X. Nie, Q. J. Jiao, J. Li, and M. Ren

327 Optimization of EM Railgun Based on Orthogonal Design Method and Harmony Search

Algorithm Yan Yan, Tao Chao, Ping Ma, Ming Yang, and Yuwei Hu

333 3D FEM Analysis of a Novel Magnetic Levitation SystemUgur Hasirci, Abdulkadir Balikci, Zivan Zabar, and Leo Birenbaum

338 Enabling Scientific Collaboration and Discovery through the use of Data Standardization...

S. Myers, B. Huhman

342 A Novel Current Density Distribution Sensor For Use In Parallel Plate Transmission Lines...

K. Omar, N. Graneau, B. Novae and I. Smith

ELECTROTHERMAL-CHEMICAL

348 Numerical Estimation of Arc Plasma Thermodynamic Parameters of Electromagnetic

Macroparticles Launcher Alexander V. Plekhanov

353 Electrothermal Tapered Capillary Hyper Jet Focused-Injection Plasma Source ConceptA. Leigh Winfrey and Shawn Mittal

359 Electrothermal Energetic Plasma Source Concept for High-Enthalpy Flow and

Electrothermal-Chemical ApplicationsA. Leigh Winfrey, Mohamed A. Abd Al-Halim, Shawn Mittal, and Mohamed A. Bourham

366 Modeling and Analysis of a Dual Channel Plasma Torch for Industrial, Space, and Launch

Applications Alexander Zielinski, Harry Fair, Leigh Winfrey, Shawn Mittal and Mohamed Bourham

371 Experimental Study on the Temperature Compensation Effect of Plasma in a 300 ml Closed

Bomb Jiawei Di, Yuan Li, Bing Li, Mingan Zhang, and Weiwei Zhang

374 Simulation of the Propellant Combustion by Plasma Ignition in a Closed Bomb

Jiawei Di, Yuan Li, Bing Li, Kui Nie and Mingan Zhang

378 Plasma Ignition Response for LOVA Gun Propellant at Low Loading Densities

D. Aberg, P. Hermansson, A. Sdttler, and D. Rakus

383 Research on a Linear Permanent Magnet Brushless DC Motor for Electromagnetic CatapultJunyong Lu, Xiao Zhang, Sai Tan, Xiaocun Guan, Weiming Ma, Sengyi Song

EMALS

Study on a Long Primary Moving-Magnet Type Linear Electromagnetic CatapultHuilai Li, Xiaomin Li, Zhiyuan Li

Investigation of the Inter-stator Current Control for Long Primary Winding SegmentedPMLSM Used in Electromagnetic Launch System Liyi Li, HeZhu, andc.c. Chan

Modeling and Circuit Analysis of an Electromagnetic Launcher System for Transient

Current Waveforms Seong-Ho Kim, SanghyukAn, Byungha Lee, Young-Hyun Lee, Kyung-Seung Yang

A Novel Linear Induction Motor for Electromagnetic Aircraft Launch SystemMu Shujun, Chai Jianyun, Sun Xudong, Wang Shanming

Sensorless Control Research for Linear Induction Motor Based on Sliding Mode Observer in

Electromagnetic Aircraft Launch SystemXu Qiwei, Cui Shumei, Zhang Qianfan, Song Liwei, and Xiyuan Li

Performance Analysis of Linear Induction Motor for Electromagnetic CatapultJunyong Lu, Sai Tan, Xiao Zhang, Xiaocun Guan, Weiming Ma, Sengyi Song

EMALS Optimal Design Antonino Musolino, Marco Raugi, Rocco Rizzo, Luca Sani and Mauro Tucci

EXPERIMENTAL TECHNIQUES

428 Improvement of a Current Measurement Method with Loop Probes

Ronggang Cao, Jun Li

All The Research of the Detecting the Armature Position in the Electromagnetic Launcher Bore

Xu Weidong, Yuan Weiqun, Zhao Hui, Ding Weijie, Li Mancheng, Yan Ping

436 Measurement of Solid Armature's In-bore Velocity using B-dot Probes in a Series

Augmented Railgun ShengyiSong, Cheng Cheng

442 High Velocity Wear: Experiments and Modeling Matthew J. Siopis and Richards. Cowan

389

395

401

406

411

418

423

447 The Use of Rogowski Coils in Current Measurement John P Barber

451 In Situ Temperature and Strain Instrumentation for Harsh Electromagnetic Environments

R. Hoffman, T. L. Haran, J.C. James, R. B. Vaughan, C. Lamb, and N. Meraz

457 Diagnostics for Kinematics on MTF at NRL

Scott Douglass, Robert Meger, Jesse Neri, Richard Cairns III, Remington Reid, C. Carney, B. Huhman

463 A Multiphysics Theory for the Static Contact of Deformable Conductors with Fractal RoughSurfaces J.G. Michopoulos, M. Young, and A. Iliopoulos

476 Evaluating Material Performance between High Current Contact

L. Hester, L. Compton, M. Young, D. Shores, D. Wise, A. M. Iglesias and J. Mejeur

484 Development of a Railgun Test-Bench and Methodology for Muzzle Voltage Noise Analysis ..

Nicholas M. Rada and Thomas G. Engel

POWER CONDITIONING

490 Design of Halbach Hybrid Excitation Compulsator

Shaopeng Wu, Shumei Cui, Weiduo Zhao

494 Risk Evaluation for Hybrid Excitation CompulsatorShaopeng Wu, Shumei Cui and Weiduo Zhao

499 Design and Simulation of a Novel Brushless Doubly-Fed Alternator for the Pulse Capacitor

Charge Power Supply Yuan Cheng, Qingming Xin, Caiyong Ye, Xianfei Xie, Zhenxiu Lou and Yigang He

506 Control System Based on Optical Fiber Communications for the High-Frequency High-

Voltage Charging Power Supplies' Parallel OperationKun Liu, Yinghui Gao, Jiong Wang, Yaohong Sun, Dongdong Zhang, Ping Yan, Weiqun Yuan, Rong Xu

511 Evaluation of a High Rate Hybrid Energy Storage Module (HESM]Isaac J. Cohen, David A. Wetz, Jay P. Kelley, John Heinzel, and Simon Donahue

518 Capacity Fade of a High Power Battery When Evaluated for use within a Prime Power

Supply David A. Wetz, Biju Shrestha, Peter M. Novak, and Simon Donahue

525 Optimized Design and Simulation of a GW-Scale Multiphase Air-Core Pulsed Alternator

Caiyong Ye, Kexun Yu, Hua Zhang, Lei Tang, Xianfei Xie

530 Impacts of Commutation Voltage Drop on Self-Exciting Air-Core Pulsed Alternator

Hua Zhang, Caiyong Ye, and Kexun Yu

535 Electromagnetic Shields of the Air-Core CompulsatorWeiduo Zhao, Shumei Cui, and Xuejiao Wang

540 Measurement of Electromagnetic Radiation Dissipation in Pulse Power Supply DischargingYong Jin, Yazhou Zhang, Hui Tian, Chunxia Yang, Qinghua Lin and Booming Li

544 Transient Analysis of Air-Core Pulsed Alternators in Self-Excitation Mode

Xianfei Xie, Kexun Yu, Caiyong Ye, Lei Tang, and Hua Zhang

550 Modeling and Analysis of a Novel Magnetic Levitation Gravity CompensatorHe Zhang, Baoquan Kou, Weiduo Zhao, and Yinru Bai

555 Electromagnetic Launch Experiments Using a 4.8 MJ Pulsed Power SupplyKyung-Seung Yang, Seong-Ho Kim, Byungha Lee,

SanghyukAn, Young-Hyun Lee, Seok Han Yoon, In Su Koo, Yun SikJin, Young Bae Kim, Jong Soo Kim, Chuhyun Cho

559 Design and Analysis of a Two-Phase Two-Axis-Compensated CompulsatorWeiduo Zhao, Liwei Song and Shumei Cui

565 Rapid Recharging Power Supply for Multiple-Hit Electrical Armor

Bernd Schunemann, Dr. Ulrich Schael, Gerhard Rauer, Dr. Matthias Wickert, Richard Cunrath, and Dr. Siegfried Nau

571 The Modular Augmented Staged Electromagnetic Launcher Operated in the Energy StorageMode Martin Roch, Markus Loffler, PeterZacharias

576 Study on the Collaborative Triggering of Multiple STRETCH Meat Grinder with ICCOS

Modules Xinjie Yu, Hui Liu, Jun Li, Zhen Li, Peizhu Liu

581 Discussion on the Discharging Effects of Two STRETCH Meat Grinder Modules with

Different Triggering Delays Xinjie Yu, Hui Liu, Jun Li, Zhen Li, Peizhu Liu

586 Structural Parameters Optimization for the Inductors Used in the Inductive Pulse Power

Supply Zhen Li, Xinjie Yu, and Shangang Ma

592 Determining Key Parameters for the STRETCH Meat Grinder Circuit

Shangang Ma, Xinjie Yu, andZhen Li

598 Parameter Analysis and Optimized Configuration of the PFU for Inductive Storage SystemsShangang Ma, Xinjie Yu, andZhen Li

604 System Implementation and Testing of STRETCH Meat Grinder with ICCOS

Xinjie Yu, Shangang Ma, andZhen Li

610 Study on the System Efficiency of the Synchronously-triggered Capacitive Pulsed-powerSupply in the Electromagnetic Railgun System Chen Gong, Xinjie Yu, andXiucheng Liu

616 A Flexible Waveform Conditioning Strategy of an Air-Core Pulsed Alternator

Xiyuan Li, Shumei Cui, andXin Zhao

623 Analytical Calculation of d- and q-Axis Synchronous Reactances of Homopolar Inductor

Alternator Zhenxiu Lou, Yigang He, Yuan Cheng, Caiyong Ye, and Kexun Yu

631 Thermal Performance Study on Pulsed Inductor

Yanshun Yu, Jiannian Dong, and Jun Zhang

636 Development on High-power and High Power Density Capacitor Charging Power SupplyGao Yinghui, Liu Kun, Fu Rongyao, Wang Jiong, Pin Yan, Sun Yaohong, Yuan Weiqun

642 Synchronization of Multiple Pulsed Alternators Discharging into an EM Launcher

Dr. Sid Pratap, Dr. Ray Zowarka, Mr. Tom Hotz, Mr. Scott Pish, Dr. Brian Murphy

648 Analysis and Design of Homopolar Motors and Generators

T. G. Engel and E. A. Kontras

654 Voltage and Current Scaling Relationships for Electromagnetic Launchers T. G. Engel

658 Pulsed Power Options for Large EM Launchers Ian R. McNab

669 Development of a Rep-rated Capacitor Bank Utilizing Electrochemical Energy Storage*B.M. Huhman, J. M. Neri, D.A. Wetz, and L. Mili

PROJECTILES

675 Further Experiments with an UHF Radio Link to a Railgun Projectile5. Hundertmark, Y. Schaeffer, D. Simicic and G.Vincent

679 Acceleration of Aluminum Booster Projectiles with PEGASUS

S. Hundertmark, D. Simicic and G.Vincent

684 Aerothermodynamics Analysis of the Electromagnetically Launched Projectiles under

Rarefied Gas Conditions N. Sengil and u. Sengil

689 Thermal Protection-, Aerodynamics- and Control Simulation of an ElectromagneticallyLaunched Projectile d. Lancelle ando. Bozic

695 High-Voltage Repetition-Frequency Charging Power Supply for Pulsed Laser

Kun Liu, Rongyao Fu, Yinghui Gao, Yaohong Sun, Dongdong Zhang, Ping Yan, Weiqun Yuan, Rong Xu

RAILGUN

700 Electromechanical Performance of Rails with Different Cross-section Shapes in RailgunLongwen Jin, Bin Lei, Qian Zhang, Rengui Zhu

705 On Velocity Skin Effect- Part I: Physical Principle Analysis and Equivalent Models

Simulation Qing-ao Lv, Zhi-yuan Li, Bin Lei, Ke-yiZhao, Qian Zhang, Hong-jun Xiang, and Yan-chang Xing

712 On Velocity Skin Effect- Part II: Restraining Method Analysis and Optimal DesignSimulation Qing-ao Lv, Zhi-yuan Li, Bin Lei, Ke-yiZhao, Qian Zhang, Hong-jun Xiang, and Yan-chang Xing

717 An Approach for Eddy Current Calculation in Railguns Based on the Finite Element Method

Peng Zuo, Yiqing Geng, Jun Li, Jiansheng Yuan

722 Study on Current Concentration of Large-Caliber C-Shaped Armature at Current Ramp-up

Stage in Square RailgunLiangliang Tang, Junjia He, Lixue Chen, Shengguo Xia, Deng Feng, Jun Li, and Ping Yan

727 Optimizing Study on the concave Arc Surfaced C-Shaped Armature with Medium and Small

Caliber Liangliang Tang, Junjia He, Lixue Chen, Shengguo Xia, Deng Feng, Jun Li, and Ping Yan

733 Analysis of the Asymmetry of Railgun SystemSu Zizhou, Guo Wei, Zhang Too, Huang Kai, Li Ming-tao, and Sun Xiaochao

737 Analysis of the Dynamic Characters of C-shaped Armature in RailgunSu Zi-zhou, Guo Wei, Zhang Too, Fan Wei, Zhang Bo, Dong Zhi-qiang, Cao Bin

742 Experimental Study of Armature Melt Wear in Solid Armature RailgunLixue Chen, Zheng Xiao, Junjia He, Shengguo Xia, Deng Feng and Liangliang Tang

747 The Influence of Mechanical Preload on Muzzle Speed in Solid Armature RailgunLixue Chen, Junjia He, Shengguo Xia, Deng Feng and Liangliang Tang

752 The Effect of Geometric Enhancement on the Magnetic Saw Effect

AlexJ. Sitzman, Francis Stefani, David L. Bourell

758 Investigations on Non-Uniform Coefficients of Magnetic Pressure Distribution in RailgunsDeng Feng, Junjia He, Shengguo Xia, Lixue Chen, Liangliang Tang, Jun Li, and Ping Yan

763 Study of Properties of the Double-deck Rail in the Electromagnetic Launching SystemJ.X. Nie, L.Yang, Q. J. Jiao, J. Li and M. Ren

768 Impact Physics Model and Influencing Factors of Gouging for Electromagnetic Rail

Launcher RenguiZhu, Qian Zhang, Zhiyuan LI, Longwen Jin, Ruilin Wang

774 Research on Evaluation of Electromagnetic Railgun EfficiencyXia Ge, Bin Cao, Juxiang Li, Xiaochao Sun and Yong Liang Yang

779 Electromagnetic Railgun Armature Magnetic Field Measurement and Analysis Based on B-

Dot Probe Signal Bin Cao, Xia Ge, Yong Liang Yang, Juxiang Li, Xiaochao Sun and Wei Fan

785 Effect of Geometrical Parameters on Inductance Gradient of Multiple ElectromagneticRailguns R. Xu, W. Q. Yuan, W. P. Cheng, P. Yan

789 Using the SR\3-60 Railgun in Augmented Mode g. Vincent, s. Hundertmark

793 Electromagnetic-thermal Coupled Analysis of the Armature in the Electromagnetic Rail

Launcher Wang Chengxue, Wang Huijin, Cao Yanjie, Wang min

798 Characteristics of High Pulsed Current Electromagnetic Rail Launcher

Zhao Ying, Xu Rong, Yuan Weiqun, Cheng Wenping, Yan Ping, Li Mancheng, Xie Keyu, Wang Xianbin

803 Design and Testing a Novel Armature on RailgunWei Guo, Tao Zhang, Weiqun Shao, Dong Yang, Zizhou Su, Yanhui Chen, Huasa Yu, Ren Ren, and Juxiang Li

809 Influencing Factors Study of Armature Current Distribution at Current Ramp-up in RailgunLiangliang Tang, Junjia He, Lixue Chen, Shengguo Xia, Deng Feng, Jun Li, and Ping Yan

815 Railgun with Steel Barrel Sections and Thermal Management System George Arthur Proulx

821 Circuit Simulation Research of Electromagnetic Rail Launcher System with a View to Multi¬

field Characteristics Yuan Zhou, Dongdong Zhang, Ping Yan, and Weiqun Yuan

827 Structural Mechanics of Railguns with Open Barrels and Elastic Supports: The Influence of

Multishot Operation R. Stonkus, J. Rackauskas, M. Schneider and R. Kacianauskas

833 Block Diagram Model for the Simulation of an Electromagnetic Rail Accelerator System

Thorbjorn Siaenen, Markus Schneider, James Hogan

838 The Influence of the Rail Material on the Multishot Performance of the Rapid Fire Railgun

(RAFIRA] Barbara Wild, Christian Schuppler, Farid Alouahabi, Markus Schneider and Ryan Hoffman

843 Single Shot Performance of RAFIRA Markus Schneider, Christian Schuppler and Farid Alouahabi

847 Simulation and Test Study on Different Structure Bore of Electromagnetic Launch

Qingxia Zhang, Jun Li, Shizhong Li, Peizhu Liu, Ronggang Cao, Lixue Cheng, Weiqun Yuan

^52 Definition of the Large Enough Size of the Contact Area between Armature and Rails in

Railguns Zejun Shen, Penghao Xie, Yiqing Geng, Peng Zuo, and Jiansheng Yuan

856 An Investigation on Muzzle Velocity Repeatability of a RailgunYong He, Shengyi Song, Yongchao Guan, Cheng Cheng, Wenfeng Dai, Xu Qiu, Yexun Li, Guishan Gao

861 Resonant Shield Concept as Alternative Solution in RailgunsM. Bologna, M. Marracci, R. Micheletti, M. Schneider, and B. Tellini