Unsteady analysis and experimental verification of the aerodynamic vibration mechanism of HDD arms
The authors investigate the flow structure in 3.5-in hard disk drives with a rotation speed of 10033 rpm, especially the unsteady flow around actuator arms with and without a weight-saving hole, and clarify the unsteady flow in detail. In the method of approach utilized in this investigation, they u...
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Veröffentlicht in: | IEEE transactions on magnetics 2003-03, Vol.39 (2), p.819-825 |
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creator | Tsuda, N. Kubotera, H. Tatewaki, M. Noda, S. Hashiguchi, M. Maruyama, T. |
description | The authors investigate the flow structure in 3.5-in hard disk drives with a rotation speed of 10033 rpm, especially the unsteady flow around actuator arms with and without a weight-saving hole, and clarify the unsteady flow in detail. In the method of approach utilized in this investigation, they used: 1) a direct numerical simulation of the Navier-Stokes equations to analyze the flow field; 2) a laser Doppler velocimeter to measure the velocity field; and 3) a laser Doppler vibrometer to monitor unsteady displacement of the actuator arm. The authors find a three-dimensional spiral vortex in the wake region of the arm and the flow spilled from the weight-saving hole. These flows can be considered to be an excitation source for the actuator arm. The power spectrum of the arm torque generated by calculated wind disturbance agrees with that of measured wind disturbance. This verifies the existence of the predicted vortices and the flow spilled from the weight-saving hole. |
doi_str_mv | 10.1109/TMAG.2003.808931 |
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In the method of approach utilized in this investigation, they used: 1) a direct numerical simulation of the Navier-Stokes equations to analyze the flow field; 2) a laser Doppler velocimeter to measure the velocity field; and 3) a laser Doppler vibrometer to monitor unsteady displacement of the actuator arm. The authors find a three-dimensional spiral vortex in the wake region of the arm and the flow spilled from the weight-saving hole. These flows can be considered to be an excitation source for the actuator arm. The power spectrum of the arm torque generated by calculated wind disturbance agrees with that of measured wind disturbance. This verifies the existence of the predicted vortices and the flow spilled from the weight-saving hole.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2003.808931</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Actuators ; Aerodynamics ; Applied sciences ; Arm ; Computational fluid dynamics ; Disk drives ; Displacement measurement ; Disturbances ; Electronics ; Exact sciences and technology ; Fluid flow ; Fluid flow measurement ; Hard disks ; Magnetic and optical mass memories ; Magnetism ; Mathematical analysis ; Navier-Stokes equations ; Numerical simulation ; Other magnetic recording and storage devices (including tapes, disks, and drums) ; Storage and reproduction of information ; Unsteady ; Unsteady flow ; Velocity ; Velocity measurement ; Wind power generation</subject><ispartof>IEEE transactions on magnetics, 2003-03, Vol.39 (2), p.819-825</ispartof><rights>2003 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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In the method of approach utilized in this investigation, they used: 1) a direct numerical simulation of the Navier-Stokes equations to analyze the flow field; 2) a laser Doppler velocimeter to measure the velocity field; and 3) a laser Doppler vibrometer to monitor unsteady displacement of the actuator arm. The authors find a three-dimensional spiral vortex in the wake region of the arm and the flow spilled from the weight-saving hole. These flows can be considered to be an excitation source for the actuator arm. The power spectrum of the arm torque generated by calculated wind disturbance agrees with that of measured wind disturbance. This verifies the existence of the predicted vortices and the flow spilled from the weight-saving hole.</description><subject>Actuators</subject><subject>Aerodynamics</subject><subject>Applied sciences</subject><subject>Arm</subject><subject>Computational fluid dynamics</subject><subject>Disk drives</subject><subject>Displacement measurement</subject><subject>Disturbances</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Fluid flow</subject><subject>Fluid flow measurement</subject><subject>Hard disks</subject><subject>Magnetic and optical mass memories</subject><subject>Magnetism</subject><subject>Mathematical analysis</subject><subject>Navier-Stokes equations</subject><subject>Numerical simulation</subject><subject>Other magnetic recording and storage devices (including tapes, disks, and drums)</subject><subject>Storage and reproduction of information</subject><subject>Unsteady</subject><subject>Unsteady flow</subject><subject>Velocity</subject><subject>Velocity measurement</subject><subject>Wind power generation</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqN0c1L5TAQAPAgu-Bb3fuClyK4nvqcNGmaHMVvcPGi5zBNpxjpxzPpE99_vykVBA_LnjJhfjMhM4z94rDmHMzZ45_zm3UBINYatBF8j624kTwHUOYbWwFwnRup5D77EeNLusqSw4rVT0OcCJtdhgN2u-hjCpqM3jcUfE_DhF32lsLWO5z8OGRjm03PlCGFsdkN2HuXvfk6LMme3DMOPvYzu728zDD08ZB9b7GL9PPjPGBP11ePF7f5_cPN3cX5fe4kL6acaiexlAXUusZGF6BIC0kVgmrr1jkCgYrXZUKiIUGaigq5cNq1WFJhxAE7Xfpuwvi6pTjZ3kdHXYcDjdtoDXBVGSNm-fufstBGK67gP6CUVal1gsdf4Mu4DWmi0WothVQVzAgW5MIYY6DWbtKMMewsBzsv0c5LtPMS7bLEVHLy0Rejw64NODgfP-ukKpSuRHJHi_NE9Jnm6c_p4b9MrqXl</recordid><startdate>20030301</startdate><enddate>20030301</enddate><creator>Tsuda, N.</creator><creator>Kubotera, H.</creator><creator>Tatewaki, M.</creator><creator>Noda, S.</creator><creator>Hashiguchi, M.</creator><creator>Maruyama, T.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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In the method of approach utilized in this investigation, they used: 1) a direct numerical simulation of the Navier-Stokes equations to analyze the flow field; 2) a laser Doppler velocimeter to measure the velocity field; and 3) a laser Doppler vibrometer to monitor unsteady displacement of the actuator arm. The authors find a three-dimensional spiral vortex in the wake region of the arm and the flow spilled from the weight-saving hole. These flows can be considered to be an excitation source for the actuator arm. The power spectrum of the arm torque generated by calculated wind disturbance agrees with that of measured wind disturbance. This verifies the existence of the predicted vortices and the flow spilled from the weight-saving hole.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2003.808931</doi><tpages>7</tpages></addata></record> |
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subjects | Actuators Aerodynamics Applied sciences Arm Computational fluid dynamics Disk drives Displacement measurement Disturbances Electronics Exact sciences and technology Fluid flow Fluid flow measurement Hard disks Magnetic and optical mass memories Magnetism Mathematical analysis Navier-Stokes equations Numerical simulation Other magnetic recording and storage devices (including tapes, disks, and drums) Storage and reproduction of information Unsteady Unsteady flow Velocity Velocity measurement Wind power generation |
title | Unsteady analysis and experimental verification of the aerodynamic vibration mechanism of HDD arms |
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