Design of embedded storage test system for structure vibration and shock sequential environment test

Abstract

The abnormal environmental vibration and shock sequential test is a very important mechanical environment for missile structures. The long-time vibration acceleration response and transit shock acceleration response for internal structure of structures are main test concern signals. Because of special test condition, some commonly-used desktop bus test instruments with large size cannot be used, the miniaturized embedded storage test system installed in the internal of structures is fit to this kind of test.This topic introduces the design of an embedded storage test system that can complete vibration signals and shock signals acquisition for vibration and shock sequential abnormal mechanical environment test. For its vibration test unit, the simultaneous sampling frequency is 10kHz per channel with 16 channels; For its shock test unit, the simultaneous data acquisition frequency is 500kHz per channel with 32 channels. The test and control commands and test data transmission of this system is based on USB bus, the system is powered by Lithia-battery. The software and hardware interface technique, the encoding and decoding technique of test data and signal analysis and process technique are described in detail. This embedded storage test system has been successfully applied to a rocket flight vibration test and dropping and firing abnormal environmental test, and has obtained test data effectively, it provides the data reference for mechanical structure design of structures.