基于LabVIEW的小加速度大脉宽冲击试验台设计

Design of Small Acceleration and Large Pulse Width Impact Testing Machine Based on LabVIEW

摘要: 随着航空航天事业的发展，对航天器和航天救生设备的耐冲击性能要求也在不断提高。设计了一种能发生5~15 g/100ms以上小加速度大脉宽冲击波型的冲击试验台，能较好的模拟航天设备的坠落冲击条件。本文利用PCI-6521数采卡连接上位机、控制系统和数据采集系统，为了消除噪声干扰，设计了加速度传感器信号调理电路，并且在LabVIEW数据采集部分设计了零点漂移和滤波器模块。冲击试验台已经设计完成，经测试控制系统能可靠控制冲击试验台，能发生需求的小加速度大脉宽半正弦冲击波形，并准确生成冲击响应谱，分析物体耐冲击性能。

Abstract: With the development of Aeronautics and Astronautics, the requirement of shock resistance for spacecraft and space lifesaving equipment is also increasing. A kind of impact testing machine with small acceleration and large pulse width of 5 - 15 g/100ms is designed. It can simulate the falling impact condition of space equipment better. In this paper, using the PCI-6521 data acquisition card to connect control system and data acquisition system to the computer, in order to remove the noise, acceleration sensor signal conditioning circuit is designed, and the zero drift and filter module are designed in LabVIEW data acquisition. The impact testing machine has been designed and completed. The test system can reliably control the test machine, the small acceleration, large pulse width and half sine shock wave can be generated, and the shock response spectrum can be generated accurately, the shock resistance of the object is analyzed.