Design Of Overload Test Systems In Strong Electromagnetic Environments

Overload testing is an important tool to assist in the development of weapons and to assess their performance,and has been used extensively in the development and evaluation of traditional artillery.With the development of weapons technology,new types of weapons and equipment are emerging on the modern battlefield.In the face of higher strength composite armor and increasingly flexible air units,electromagnetic rail guns are useful as a new type of weapon with ultra-high speed and ultra-high energy.Unlike traditional artillery,which relies on chemical energy,electromagnetic rail guns rely on Lorentz force to launch the projectile,and strong electromagnetic fields are generated during the launch process.At present,most of China’s electromagnetic rail guns are still in the research and development stage,so it is necessary to design an overload test system that is suitable for strong electromagnetic environment.The research and design of an overload test system in a strong electromagnetic environment was completed for the electromagnetic rail gun test requirements proposed by a research institute.Based on the analysis and summary of the electromagnetic rail gun firing principle,the characteristics of the magnetic field distribution in the chamber,the existing testing means and the electromagnetic shielding principle,and the design experience of the traditional overload testing system,a multi-layer composite protective shell with electromagnetic shielding capability is designed for the strong electromagnetic testing environment.In terms of hardware design,a dual backup storage scheme is composed of FRAM and FLASH based on ferroelectric effect with strong electromagnetic resistance,and a programmable digital conditioning circuit is designed to achieve adjustable and controllable amplification for the adjustable nature of electromagnetic rail gun emission energy.Finally,the overload test system was debugged and coefficient calibrated,and the impact table overload test was completed,and its function was in accordance with the predetermined design and the error was within the range required by the index.In the live firing experiment,the overload test system successfully completed the measurement and storage of high overload data.The overload test system is expected to be applied to the firing overload test of electromagnetic rail guns.