Research On Simulation Test Of Infrared Radiation Characteristics Of Flying Projectile

With the increasing levels of research and manufacture of weapons systems, newer and higher requirements for the modern weapons are proposed related measurement method and measurement parameters. the accuracy of the parameter get from conventional weapons shooting tests is quite important for its performance assessment and developing new technologies.The velocity measurement of projectiles is a major technical specification in assessing cannons, guns and bullets. Currently, the most popular way to test projectile velocity is active measurement in the use of photoelectric target within visible light range. However, it is not able to get the projectile information in the environment of low light and at night by this measuring way. So adopting infrared detection technology, it analyzes and studies the infrared radiation characteristic of the flying projectile.When conducting infrared measurement for flying projectiles of different conditions, their infrared radiation characteristics and the related parameter must be known. It can be obtained through both actual measurement and theoretical calculation. Currently, the actual measurement for the radiation energy of flying projectiles is not practical in our country, so this article researches on the infrared measurement of flying projectiles from the perspective of theoretical analysis, computer simulation and simulation test, and finally provides relevant technical proposals for simulation test of flying projectiles. The specific work is as follows:1. Building a simplified geometric model of projectiles to analyze factors influencing the infrared radiation of flying projectiles, and establishing transient differential equation for projectiles to conduct theoretical calculation of infrared radiation of flying projectiles; 2. Through samples, under given conditions, making simulations with MATLAB for three projectiles, respectively 7.62mm rifle bullet,5.8mm submachine gun bullet and 5.56mm Type 54 Pistol bullet. The simulations are as follows:a. geometric model simulations of projectiles, obtaining geometric semi-section diagrams of three projectiles; b. simulation curves of projectile velocity and temperature varying with time; c. curves of radiant exitance of three projectiles varying with wavelength. The result shows:the velocity and temperature of a projectile are the major influencing factors of its infrared radiation characteristics. The detector wavelength has been decided, and the range of the wavelength is from 2.1pm to 4μm; 3. Designing the platform for infrared radiation simulation test of flying projectiles, including the overall structure design of the test platform, as well as the design and function of each part; 4. Building the platform for infrared radiation simulation test of flying projectiles.The projectile is simulated by the ordinary thermal radiation source and the system test accuracy is verified.The result shows that the simulation test system for flying projectiles is stable and meets the requirements for measurement.The system error is less than 0.7%. This design has laid a good foundation for follow-up infrared radiation simulation tests of flying projectiles.