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Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7.

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Presentation on theme: "Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7."— Presentation transcript:

1 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The capacitances and voltages of the slider/disk system. When both the DC and AC are supplied to the heater, a part of the AC will appear between the slider and the disk. Here, V 0 is the tribo-voltage between the slider and the disk. Figure Legend:

2 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 Pemto slider for the simulation and experiment. The red dot at the bottom left represents the laser beam cast position. Figure Legend:

3 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The air bearing pressure profile of the slider when the thermal protrusion is 29 nm. The simulation is based on the unstructured triangular mesh. (a) Isometric view of the air bearing pressure and (b) top view of the air bearing pressure. Figure Legend:

4 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The 2D disk waviness used for the simulation Figure Legend:

5 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The slider flying attitude when no AC is on the slider/disk interface. (a) Head flying height versus time, (b) pitch angle versus time, and (c) roll angle versus time. Figure Legend:

6 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The slider flying attitude when the AC frequency is 100 KHz. (a) Head flying height versus time, (b) pitch angle versus time, and (c) roll angle versus time. Figure Legend:

7 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The slider flying attitude when the AC frequency is 280 KHz. (a) Head flying height versus time, (b) pitch angle versus time, and (c) roll angle versus time. Figure Legend:

8 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The SDs of the flying attitude versus the AC frequency at a radius of 25 mm and a skew angle of 0 deg. (a) Head flying height SD, (b) pitch angle SD, and (c) roll angle SD. Figure Legend:

9 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 FFT of the pitch angle versus time for different AC frequencies. (a) When no AC is supplied, (b) when the AC frequency is 100 KHz, and (c) when the AC frequency is 280 KHz. Figure Legend:

10 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The FFT on the roll angle response after the slider is excited. The excitation conditions are: slider vertical speed = −5 mm/s (toward disk), pitch angle speed = 5 rad/s, and roll angle speed = 5 rad/s. Figure Legend:

11 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 FFT power spectrum of slider vibration measured by LDV. Different electric power is supplied to the heater such that the slider can fly at three different states: just before contact, mild contact, and heavy contact. Figure Legend:

12 Date of download: 6/22/2016 Copyright © ASME. All rights reserved. From: Heater AC Voltage Induced Flying Height Modulations J. Tribol. 2013;136(1):011901-011901-7. doi:10.1115/1.4025603 The SDs of the flying attitude versus the AC frequency at a radius of 33 mm and a skew angle of 15 deg. (a) Head flying height SD, (b) pitch angle SD, and (c) roll angle SD. Figure Legend:


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