Design And Implementation Of Bomb Data Recorder

In the development stage of China’s defense science and technology and weaponry,in order to improve the national defense science and technology strength,measuring the key signals in new weapons and equipment plays an irreplaceable role in military,war and other aspects.In this paper,a missile borne data recorder system is proposed and developed according to the actual needs of a certain Aerospace Research Institute.According to a series of requirements of the Space Research Institute for the recorder to be developed,the overall design principles of the system are given.According to these principles,the overall scheme of the missile borne data recorder is designed,and the corresponding software system is designed and implemented on the basis of the hardware platform.Finally,through the system joint debugging and environmental test,the recorder can meet the expected requirements.According to the technical requirements of the project,this paper first puts forward the overall scheme of the system,introduces the workflow of the system.Secondly,the hardware circuit of the system is designed in modules,including interface module,main control module,power management module,USB communication interface module and flash memory module,and the reliability of epoxy resin encapsulation process is studied.Then,the timing of the system software is explained,focusing on the data acquisition and storage part.The four working states of nandflash are mainly described: bad block detection and processing,page programming operation,FLASH read data operation and flash erase operation.The reliability of ECC verification algorithm is explored,and the error of one bit is corrected,The data is analyzed and the waveform is played back by the upper computer analysis software.The whole system through simulation test,experimental environment test and system joint debugging,finally determined that the recorder performance meets the design requirements,the system can work normally,complete acquisition of many parameters in the flight process.