Electromagnetic processes and launch efficiency of railgun systems

Fat’yanov, O. V.; Usuba, S.; Yoshida, Masatake; Kakudate, Y.; Yokoi, Hiroyuki; Fujiwara, S.

doi:10.1109/20.560069

Cited by 6 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, different ways of describing the function numerically were published in the past. Such a device is driven by electric current, so that the natural approach to use the PSPICE code, as published in [1]- [3]. All constitutive equations are converted into circuits consisting of basic circuit elements, which makes the modeling challenging.…”

Section: Introductionmentioning

confidence: 99%

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

Siaenen

Schneider

Hogan

2015

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Rail accelerators are superior to classical gas-driven accelerators with regard to attainable terminal velocity, ignition delay variation, and controllability. The behavior is generally described with a system of nonlinear differential equations, which can be solved in many ways. This is done in order to describe an existing launcher, to predict its performance when parameters change, or to estimate the properties of such a system in the design phase. This paper presents a simplified electromechanical system of differential equations in a novel form. This form enables scientists to solve the equations using one of the following software: Scilab, MATLAB, or a similar one. The model is robust and parameter changes have a low impact on the solving time. This makes it a reliable tool for parametric studies. The model comprises pulsed power capacitors, the pulseforming network, cables, and the launcher itself. At first, the electrical part is described with its circuit equivalent and coupled with the mechanical process. Second, the system is analytically transposed to a standard form. This form is then transferred into the simulation software, which solves the equations. It can simply be adapted to other launchers and modified to comprise nonlinear side effects. The simulation results are compared with experimental results from the augmented rail accelerator at the French-German Research Institute of Saint-Louis, France.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Siaenen

Schneider

Hogan

2015

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…Markus Schneider is with the French-German Research Institute of Saint-Louis (ISL), 5 rue du Général Cassagnou, 68301 SAINT-LOUIS CEDEX, France (e-mail: markus.schneider@isl.eu) James Hogan is with the Hopkins Extreme Materials Institute, Baltimore, Maryland [3]. All constitutive equations are converted into circuits consisting of basic circuit elements, which makes the modeling challenging.…”

Section: Introductionmentioning

confidence: 99%

Block diagram model for the simulation of an electromagnetic rail accelerator system

Siaenen

Schneider

Hogan

2014

2014 17th International Symposium on Electromagnetic Launch Technology

View full text Add to dashboard Cite

Rail accelerators are superior to classical gas driven accelerators with regard to attainable terminal velocity, ignition delay variation, and controllability and, therefore, have received a growing scientific interest in the recent past. The behavior of such a launcher is generally described with a system of nonlinear differential equations, which can be solved in many ways. This is done in order to describe an existing launcher, to predict its performance when parameters change, or to estimate the properties of such a system in the design phase. This paper presents a simplified electro-mechanical system of differential equations in a novel form. This form enables scientists and engineers to solve the equations using the software Scilab, Matlab or a similar one. The model is robust and parameter changes have a low impact on the solving time. This makes it a reliable tool for parametric studies. The model comprises the pulsed power capacitors, the pulse forming network, cables and the launcher itself. At first, the electrical part is described with its circuit equivalent and coupled with the mechanical process. Secondly, the system is analytically transposed to a standard form. This form is then transferred into the simulation software, which solves the equations. It can be simply adapted to other launchers and modified to comprise nonlinear side effects. The simulation results are compared to experimental results from the augmented rail accelerator at the French-German Research Institute Saint-Louis, France. A comparison between simulation results and experimental measurements shows a good agreement, whereas the model is still kept simple.

show abstract

A general theory of DC electromagnetic launchers

Engel

Timpson

2015

Journal of Applied Physics

View full text Add to dashboard Cite

The non-linear, transient operation of DC electromagnetic launchers (EMLs) complicates their theoretical understanding and prevents scaling studies and performance comparisons without the aid of detailed numerical models. This paper presents a general theory for DC electromagnetic launchers that has simplified these tasks by identifying critical EML parameters and relationships affecting the EML's voltage, current, and power scaling, as well as its performance and energy conversion efficiency. EML parameters and relationships discussed in this paper include the specific force, the operating mode, the launcher constant, the launcher characteristic velocity, the contact characteristic velocity, the energy conversion efficiency, and the kinetic power and voltage-current scaling relationship. The concepts of the ideal EML, same-scale comparisons, and EML impedance are discussed. This paper defines conditions needed for the EML to operate in the steady-state. A comparison of the general theory with experimental results of several different types of DC (i.e., non-induction) electromagnetic launchers ranging from medium velocity (100's m/s) to high velocity (1000's m/s) is performed. There is good agreement between the general theory and the experimental results.

show abstract

Electromagnetic processes and launch efficiency of railgun systems

Cited by 6 publications

References 3 publications

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

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

Block diagram model for the simulation of an electromagnetic rail accelerator system

A general theory of DC electromagnetic launchers

Contact Info

Product

Resources

About