Hard disk drive with voltage-driven voice coil motor and model-based control
In this paper, we describe the voice coil model-based control (VCMC), a new solution for driving the voice coil motor (VCM) in hard disk drives (HDDs), in which the usual current driver for the VCM has been replaced by a voltage driver. The VCMC replicates the behavior of a current loop by using a m...
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| Veröffentlicht in: | IEEE transactions on magnetics 2005-02, Vol.41 (2), p.784-790 |
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| container_title | IEEE transactions on magnetics |
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| creator | Oboe, R. Marcassa, F. Maiocchi, G. |
| description | In this paper, we describe the voice coil model-based control (VCMC), a new solution for driving the voice coil motor (VCM) in hard disk drives (HDDs), in which the usual current driver for the VCM has been replaced by a voltage driver. The VCMC replicates the behavior of a current loop by using a model of the VCM and its driver, including the saturation of the power stage. Since VCM resistance may change by 30% during HDD operations, the model used by VCMC must be adapted accordingly, in order to achieve the same performance as the standard current driver. This paper presents a pair of online estimation procedures used to get the value of the VCM coil resistance during seek and track following, respectively. It will be shown that both procedures are quite accurate in estimating variations of VCM resistance and their output can be used to perform online tuning of the VCMC. Experimental results show that the servo performance with the adaptive VCMC is not affected by resistance variation and it is equivalent to that of the standard current driver. |
| doi_str_mv | 10.1109/TMAG.2004.840337 |
| format | Article |
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The VCMC replicates the behavior of a current loop by using a model of the VCM and its driver, including the saturation of the power stage. Since VCM resistance may change by 30% during HDD operations, the model used by VCMC must be adapted accordingly, in order to achieve the same performance as the standard current driver. This paper presents a pair of online estimation procedures used to get the value of the VCM coil resistance during seek and track following, respectively. It will be shown that both procedures are quite accurate in estimating variations of VCM resistance and their output can be used to perform online tuning of the VCMC. Experimental results show that the servo performance with the adaptive VCMC is not affected by resistance variation and it is equivalent to that of the standard current driver.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2004.840337</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Coiling ; Coils ; Costs ; Cross-disciplinary physics: materials science; rheology ; Current measurement ; Disk drives ; Driver circuits ; Drivers ; Energy consumption ; Exact sciences and technology ; Hard disks ; identification ; Magnetism ; Materials science ; Mathematical models ; Motors ; On-line systems ; Other topics in materials science ; Physics ; Pulse amplifiers ; Pulse width modulation ; Servomechanisms ; Studies ; Voice ; Voltage control</subject><ispartof>IEEE transactions on magnetics, 2005-02, Vol.41 (2), p.784-790</ispartof><rights>2005 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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The VCMC replicates the behavior of a current loop by using a model of the VCM and its driver, including the saturation of the power stage. Since VCM resistance may change by 30% during HDD operations, the model used by VCMC must be adapted accordingly, in order to achieve the same performance as the standard current driver. This paper presents a pair of online estimation procedures used to get the value of the VCM coil resistance during seek and track following, respectively. It will be shown that both procedures are quite accurate in estimating variations of VCM resistance and their output can be used to perform online tuning of the VCMC. Experimental results show that the servo performance with the adaptive VCMC is not affected by resistance variation and it is equivalent to that of the standard current driver.</description><subject>Coiling</subject><subject>Coils</subject><subject>Costs</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Current measurement</subject><subject>Disk drives</subject><subject>Driver circuits</subject><subject>Drivers</subject><subject>Energy consumption</subject><subject>Exact sciences and technology</subject><subject>Hard disks</subject><subject>identification</subject><subject>Magnetism</subject><subject>Materials science</subject><subject>Mathematical models</subject><subject>Motors</subject><subject>On-line systems</subject><subject>Other topics in materials science</subject><subject>Physics</subject><subject>Pulse amplifiers</subject><subject>Pulse width modulation</subject><subject>Servomechanisms</subject><subject>Studies</subject><subject>Voice</subject><subject>Voltage control</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kU1LAzEQhoMoWKt3wcsiqKetk4_NJsdS_IKKFz2HNMlqdLupybbivzdrBcGDp5nJPDOTlxehYwwTjEFePt5PbyYEgE0EA0rrHTTCkuESgMtdNALAopSMs310kNJrLlmFYYTmtzrawvr0VtjoN6748P1LsQltr59d-f3U5dIbV5jg22IZ-hAL3dmcWdeWC52cza2uj6E9RHuNbpM7-olj9HR99Ti7LecPN3ez6bw0VNC-dJYvKiEcJ1BVRAMDzrkUuJE15osaUyIEwxQMqUlDsTVAua00ryvWZGlAx-hiu3cVw_vapV4tfTKubXXnwjopibNQxkBk8vxfkgiAitQyg6d_wNewjl1WoQSvGecghruwhUwMKUXXqFX0Sx0_FQY1uKAGF9Tggtq6kEfOfvbqZHTbRN0Zn37neMUE5cNHT7acd879tqnkhNT0CxgbjM0</recordid><startdate>20050201</startdate><enddate>20050201</enddate><creator>Oboe, R.</creator><creator>Marcassa, F.</creator><creator>Maiocchi, G.</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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The VCMC replicates the behavior of a current loop by using a model of the VCM and its driver, including the saturation of the power stage. Since VCM resistance may change by 30% during HDD operations, the model used by VCMC must be adapted accordingly, in order to achieve the same performance as the standard current driver. This paper presents a pair of online estimation procedures used to get the value of the VCM coil resistance during seek and track following, respectively. It will be shown that both procedures are quite accurate in estimating variations of VCM resistance and their output can be used to perform online tuning of the VCMC. Experimental results show that the servo performance with the adaptive VCMC is not affected by resistance variation and it is equivalent to that of the standard current driver.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2004.840337</doi><tpages>7</tpages></addata></record> |
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| ispartof | IEEE transactions on magnetics, 2005-02, Vol.41 (2), p.784-790 |
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| subjects | Coiling Coils Costs Cross-disciplinary physics: materials science rheology Current measurement Disk drives Driver circuits Drivers Energy consumption Exact sciences and technology Hard disks identification Magnetism Materials science Mathematical models Motors On-line systems Other topics in materials science Physics Pulse amplifiers Pulse width modulation Servomechanisms Studies Voice Voltage control |
| title | Hard disk drive with voltage-driven voice coil motor and model-based control |
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