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Contact force measurement using acoustic emission analysis and system identification methods

机译:使用声发射分析和系统识别方法进行接触力测量

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Acoustic emission (AE) signals were used to investigate the contact force occurring at the head/disk interface of a computer bard drive. The AE sensor was calibrated directly using the "ball drop method" and indirectly using system identification. For the indirect calibration, a high bandwidth laser Doppler vibrometer (LDV) was used. The transfer function was established from the harmonic response derived at different vibration modes and frequencies. A finite element method based transient response simulation of impact was used to estimate the velocity and stress response of the slider. In our experiments, contact forces were found to be in the range of 5-25 mN for nano sliders and 2-10 mN for pico sliders.
机译:声发射(AE)信号用于研究计算机Bard驱动器的磁头/磁盘接口处发生的接触力。使用“落球法”直接校准AE传感器,并使用系统识别间接校准。对于间接校准,使用了高带宽激光多普勒振动计(LDV)。传递函数是根据在不同振动模式和频率下得出的谐波响应建立的。基于有限元方法的冲击瞬态响应仿真被用来估计滑块的速度和应力响应。在我们的实验中,发现纳米滑块的接触力范围为5-25 mN,微微滑块的接触力范围为2-10 mN。

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