Application And Research Of Fiber Bragg Grating Sensor Technology On Intelligent Ammunition

With the development of military technology,the research and development of weapons and equipment continue to innovate,and the degree of intelligence is getting higher and higher.Intelligent military weaponry systems use electricity to generate power,while the traditional electricity-based intelligent ammunition system itself forms a magnetic field,which is susceptible to electromagnetic interference and damage.Based on the continuous development of high and new technologies such as light,mechanics,electricity,and smart materials,the fiber Bragg grating temperature sensor is selected as an alternative to the traditional bomb-borne sensor.This adaptive ammunition can autonomously sense environmental information or receive instructions,and change the bomb The body aerodynamic shape and flight attitude realize adaptive continuous correction and control of the trajectory,so as to improve the accuracy of the ammunition and increase the range.This paper designs a fiber Bragg fiber temperature sensor system suitable for missiles,and analyzes the external flow field of the bare projectile and the projectile with the fiber Bragg grating temperature sensor.The specific work content is as follows:(1)Select a suitable fiber Bragg grating temperature sensor based on the environmental parameters of the bomb,and design a set of bomb-borne fiber Bragg grating temperature sensor system to pave the way for the subsequent feasibility analysis.(2)Use ANSYS Fluent software to do external flow field simulation analysis of the projectile,establish a physical model of the bare projectile and install the fiber Bragg grating temperature sensor,and use ANSYS Fluent to set the optimal variable parameter sum method to simulate the projectile to make the simulation Able to converge faster.(3)Through the post-processing of the external flow field simulation,a cloud map of the surface temperature distribution of the missile body is obtained,and the feasibility of the selected fiber Bragg grating temperature sensor on the missile-borne system is analyzed from the temperature cloud map.The temperature value of the pre-installed fiber Bragg grating temperature sensor under different Mach numbers and different incoming attack angles is extracted,and the correlation analysis of the collected temperature values according to the different Mach numbers and angles of attack can be obtained at a certain Mach It is feasible to choose a fiber Bragg grating temperature sensor with a measuring temperature range of 300K-350 K to fit on the inner surface of the projectile under the number and the incoming angle of attack;the fiber Bragg grating temperature sensor with a temperature measuring range of 320K-370 K is installed in this study.The pre-installed sensor position is based on the design of the missile-borne sensor system,which is also feasible within the range of the incoming flow angle of attack.The experimental results provide a theoretical basis for future offline tests.