Simulation and Experimental Verification of Magnetic Field Diffusion at the Launch Load during Electromagnetic Launch

Area of Science:

• Electromagnetism
• Computational physics
• Aerospace engineering

Background:

• Electromagnetic (EM) launch systems generate extreme, low-frequency, Tesla-level magnetic fields.
• These fields differ significantly from Earth's geomagnetic field and can disrupt sensitive microelectronic systems.
• Current simulation methods inadequately address the magnetic field environment at the launch load's location.

Purpose of the Study:

• To develop and validate a computational rail model for accurately simulating the magnetic field environment within an electromagnetic launch system.
• To provide a more precise prediction of magnetic flux density at the launch load.
• To enhance the design and protection strategies for electronic systems subjected to extreme EM launch conditions.

Main Methods:

• A computational rail model was developed, integrating magneto-mechanical coupling principles.
• The model incorporates dynamic current distribution during the launch process.
• Validation involved experimental measurements using three-axis magnetic sensors and a projectile-borne-storage testing method.

Main Results:

• The proposed model accurately simulates magnetic flux density distribution at the load location.
• Experimental validation confirmed the model's high accuracy, closely aligning with measured data.
• The computational approach demonstrates superior precision compared to existing literature methods.

Conclusions:

• The developed computational rail model offers a significant advancement in predicting EM launch magnetic field environments.
• This model provides crucial support for optimizing the design and ensuring the reliability of electronic systems in launch loads.
• Accurate magnetic field prediction is essential for the successful development of advanced electromagnetic launch technologies.