疲劳试验机动态校准装置的研制与实验研究

Development and experiment on dynamic calibration device of fatigue testing machine

针对疲劳试验机缺乏评价动态响应特性的方法和手段问题,对疲劳试验机动态校准装置进行了研究,开发了一套基于LabVIEW的硬件装置和可视化软件分析系统。将加速度计补偿动态惯性误差技术应用到疲劳试验机动态校准工作中,结合应变式力传感器构成了完整的测力系统;通过动态力测量基准装置,对该装置的静态特性与动态响应特性进行了评定实验,判定该系统是否能够检测到自身加速度,达到了补偿惯性误差的目的。研究结果表明:该系统静态、动态特性分别符合《标准测力仪检定规程》和《轴向加荷疲劳试验机检定规程》要求,该装置符合检定规程标准,能够精确地完成疲劳试验机检定与校准工作。

Aiming at the lack of methods and means to evaluate the dynamic response characteristics of the fatigue tester,the dynamic calibration device of the fatigue tester was studied. A set of hardware devices and visualization software analysis systems based on Lab VIEW were developed. The accelerometer-compensated dynamic inertial error technique was applied to the dynamic calibration of a fatigue tester,and a complete force-measuring system was constructed in conjunction with a strain-type force sensor. Through the dynamic force measurement reference device,the static characteristics and dynamic response characteristics of the device were evaluated to determine,whether the system can detect the self-acceleration and achieve the purpose of compensating the inertia error. The results indicate that the static and dynamic characteristics of the system are in line with the requirements of the"Standard Test Instrument Verification Rules"and"Axial Load Fatigue Tester Verification Regulations". The device meets the verification standards and can accurately complete the fatigue tester calibration.