The Investigation On The Ability Of Anti-high Overload Of A Recyclable Missile Borne Recorder

Missile borne recorder is mainly used for rapid change parameters, slowly varying parameters, control commands collection, storage. Its recording data plays a vital role in obtaining the self-dynamic parameters and environmental parameters control instruction during the flight of missile. Only by recovering to a hard landing can the recorder acquire and post-analyze the data of memory, because the missile borne recorder experiences the whole process of flight, separation and landing together with the missile. The recorder will suffer the impact of tens of thousands of acceleration of gravity at the moment of landing. In order to ensure that the memory board was recovered intact, the investigation of its ability to protect the structure of high impact of its internal protection circuit module is particularly important.This paper demonstrates a protection structure, material, and a buffering scheme to improve the ability of anti-high overload of the missile borne recorder by reviewing of existing literature, engineering practice, understanding the development of domestic and abroad status and trends of the missile borne recorder, and analyzing mechanism of failure mode during high speed impact and buffer principles and techniques of missile borne recorder.For requirements of system test, this paper designs the mechanical structure of the system. In order to make the design more reasonable, this paper uses ANSYS/ Workbench finite element numerical simulation software, to set up the dimensional finite element model of the missile borne recorder, simulate its process of a high speed bumping to concrete targets, and analyze its dynamic response during high overload.At the request of the missile borne recorder of a certain missile, after analyzing the internal measurement and storage circuit, this paper demonstrates a recyclable missile borne recorder by using FPGA as the main controller and FLASH as the memory. The anti-high overload ability of this recorder is improved by reducing the circuit design, using double backup storage, optimizing of protection structure and circuit traces, and combining buffering with encapsulation technology.The anti-impact performance of this recorder is examined by simulating drop experiments on drop-body impact Fall concussion test-beds. The investigation of influence of shock pattern and times on the recorder's anti-shock performance is achieved by placing fixed piezoresistive sensors BM1002 inside and outside the protective structures, and pasting strain gauge where is easy to be out of shape inside the tube. The test proves that this anti-high overload recording system can sustain the suffering in high overload environment. During the test, it obtains all the data completely and accurately. The overload capacity of the missile borne recorder will vary with the size of the overload.