Development of Data Acquisition System for Micro-Accelerometers’ Dynamic Centrifuge Test

Abstract

In order to achieve thedynamic flight environment simulation assessment for the micro-accelerometer usedin the inertial navigation or guidance systems, it is necessary to reform the precisionstatic centrifuge’s mechanical and electronic architecture, accompanied withthe development of the novel data acquisition system. System design, hardwareand software implementation of the DAQ system for the micro-accelerometer’s dynamiccentrifuge test is reported, which is a subsystem of the dynamic precisioncentrifuge, Involving its system architecture, hardware and softwareimplementation. The DAQ system is developed based on the virtual instrument architecture,which has the ability to handle 4 analog or digital output micro-accelerometerssimultaneously. Error analysis shows that when the micro-accelerometer’s outputvoltage signal range is +2.5 V ~-2.5V, the comprehensive measurement accuracyis less than 2.5mV; when the output voltage signal range is +12.5 V ~-12.5V, thecomprehensive measurement accuracy is less than 12.5mV. When the sampling timeinterval is 20ms, synchronization error between each sampling point and thecentrifuge controller is less than 0.1ms.