Design And Realization Of Multi-channel Real-time Data Acquisition And Storage System

Flight vehicle flight test is crucial in the development of flight vehicle, which require alot of experiments and systematic tests before being produced. To obtain working status andoperating enviorment parameters , a data acquisition system should be installed internally tomonitor the whole test procedure and record data parametes in relation to the flight attitude,operating enviroment, power, control information and image information, an overall analysisof which can be used to evaluate flight vehicle performance.This thesis, under the guidelines of macroscopic design principles for acquisition andstorage system and technical specifications for system design, is intended for a dataacquisition and storage system, which can be used to collect, encode and store the parametersacquired from the flight test procedure. The stored information can be held until the end of theflight test and later read out for further analysis.This thesis mainly touches upon organization principles of this system, relevant keytechnology, difficulties and optimization plan, circuit softwares and hardwares in the recorder.In order to simultaneously collect and store multichannel anolog quantity and digital quantity,FPGA is adopted to logically control on the whole system, thus improving flexibility,reliability and integration of the system; FLASH is used as the medium for storation, wheremodules are minimized and special protection are provided in structure, thus reducing the sizeof the system and prolonging storage life of data, and furhter enhancing reliability of thesystem.The data acquisiton and storage system designed in this thsis have been promoted inflight vehicle flight tests. After an analysis of the test results, it is manifested that the systemlives up to the demans of the task, and is featured by high integration, easy operation,overload and hot resistant, which completely confirm to the perfomance specified.