Baicheng, China
Baicheng, China

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Zhang B.-H.,Nanjing University of Science and Technology | Zhang J.-J.,Nanjing University of Science and Technology | Chang B.-K.,Nanjing University of Science and Technology | Yuan Y.-H.,Nanjing University of Science and Technology | And 2 more authors.
Binggong Xuebao/Acta Armamentarii | Year: 2012

The detection range of infrared system depends on its dynamic characteristic, the radiation of target and background, the atmospheric attenuation and so on. Aimed at the flying projectile's relative radiation received by the infrared system, a new detection range model of infrared system was proposed. It considered the equivalent area radiation of the projectile and the equivalent background radiation around the projectile and atmospheric attenuation. Based on analysis of infrared radiation on the surface of projectile, a new calculation equation for detection range was derived and analyzed.


Zhang B.,Nanjing University of Science and Technology | Zhang J.,Nanjing University of Science and Technology | Yuan Y.,Nanjing University of Science and Technology | Chen Z.,Unit 63861 of PLA | And 2 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2012

Infrared system, whose operating range must be greater than the range between the projectile and the infrared system, was used to capture the projectile in flight. In this paper, the traditional operating range formula was analyzed. The impact radiation of the infrared system received attenuation factors would be changed over time of the projectile flight, because the range between the projectile and the system would be changed over time of the projectile flight and the radiation attenuation during the atmospheric transmission changed with wavelength and the transmission distance. Considering the equivalent area radiation and background radiation were a new model of the operating range calculation of infrared system for projectile in flight was proposed. Simulating the change curve of projectile flight path and operating range, based on the simplified ballistic trajectory model of projectile, the optimum region to capture the projectile in flight was calculated, it provides theoretical basis for selection of the locations for the system to capture the projectile.


Yuan Y.-H.,Nanjing University of Science and Technology | Zhang J.-J.,Nanjing University of Science and Technology | Chen Z.-L.,Unit 63861 of PLA | Chang B.-K.,Nanjing University of Science and Technology
Binggong Xuebao/Acta Armamentarii | Year: 2010

The infrared radiation of flying projectile depends on its surface temperature distribution. Based on its simplified ballistic model, the heating process of projectile was analyzed. Then, a thermal equilibrium equation was built, and the model of temperature distribution on the projectile surface was obtained. Finally, the projectile's infrared radiation characteristics were calculated. The simulation results show that the projectile's surface temperature does not change with its speed monotonously. The bigger the muzzle speed is, and the smaller the launch angle is, the higher the surface temperature is. Moreover, the largest detection range of infrared detector varies with the projectile's infrared radiation characteristics.

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