可定位弹载存储器结构优化及可靠性研究

Research on structure optimization and reliability of positionable missile-borne flight recorder

针对可定位弹载存储器存在质量大及回收存活性等问题,在已有文献的基础上,提出了一种优化改进的存储器结构,并进行仿真及验证其可靠性。优化改进后的结构通过在存储器表面开有沉槽,将微带天线以强力胶固定于沉槽内,采用环氧树脂填充包覆;同时对防护材料进行改进,改进后的存储器外壳采用硬铝材料,该设计允许装置落地时外壳产生一定量变形,以吸收部分冲击能量,同时减小整体质量;内部采用橡胶套、环氧树脂等缓冲灌封材料进行模块化分层布局;并利用Abaqus软件模拟存储器的跌落回收过程,得到存储器关键部位应力云图和加速度曲线;同时通过冲击验证信标机及微带天线可承受的最大加速度及装置的功能完好性;最后结合仿真结果和试验数据,对比已有文献研究结果,验证结构优化的合理性及可靠性。结果表明:优化后结构的抗冲击能力有所提高,能够保证存储器在数据存储和信标定位功能正常的前提下承受峰值不小于7.6×10^(4)g的加速度冲击,由此证明优化设计的存储器防护结构设计合理、选材得当,能够有效保护关键部位不失效,提高了存储器的定位回收可靠性。

In view of the problems of large weight and recovery survivability of the positionable missile-borne flight recorder,an optimized recorder structure was proposed based on the research of the existing literature,and its reliability was verified by simulation and experiment.The optimized structure was provided with a sink groove on the surface of the recorder,and the microstrip antenna was fixed in the sink with super glue,and was filled with epoxy resin.At the same time,the protective material was improved.The improved recorder shell adopts hard aluminum material.This design allows the shell to produce a certain amount of deformation when the device lands to absorb part of the impact energy and reduce the overall weight.The interior adopts buffer encapsulating materials such as rubber sleeve and epoxy resin for modular layered layout;The abaqus software was used to simulate the drop recovery process of the memory,and the stress cloud diagram and acceleration curve of the key parts of the memory were obtained.Meanwhile,the maximum acceleration that beacon machine and microstrip antenna can withstand and the functional integrity of the device were verified by impact test.Combined with the simulation results and experimental data,the rationality and reliability of structural optimization were verified by comparing the existing literature research results.The results show that the shock resistance of the optimized structure is improved,which can ensure that the recorder withstands the acceleration shock with a peak value of not less than 7.6×10^(4) g under the premise of normal data storage and beacon positioning function.Therefore,it is proved that the optimized design of recorder protection structure is reasonable,and the selection of materials is appropriate.It can effectively protect the key parts from failure,and improve the positioning recovery reliability of the recorder.