JPH04123374A - Disk device - Google Patents

Disk device

Info

Publication number
JPH04123374A
JPH04123374A JP24431290A JP24431290A JPH04123374A JP H04123374 A JPH04123374 A JP H04123374A JP 24431290 A JP24431290 A JP 24431290A JP 24431290 A JP24431290 A JP 24431290A JP H04123374 A JPH04123374 A JP H04123374A
Authority
JP
Japan
Prior art keywords
head
acceleration
circuit
signal
acceleration feedback
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24431290A
Other languages
Japanese (ja)
Inventor
Masaharu Imura
正春 井村
Shuichi Yoshida
修一 吉田
Noriaki Wakabayashi
若林 則章
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP24431290A priority Critical patent/JPH04123374A/en
Publication of JPH04123374A publication Critical patent/JPH04123374A/en
Pending legal-status Critical Current

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  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To reduce the head positioning error due to external vibration by processing the acceleration detection signal from a detector, which detects vibration of a solid body, by an acceleration feedback means and adding this signal to a compensation signal from a control circuit of a head positioning control system, and performing the compensation by a driving means. CONSTITUTION:Acceleration sensors 14a and 14b are provided which are set on an enclosure 7 on an about plane connecting a turning center axial line 11 of a turning actuator 6 and a head 2 and detect the acceleration of the enclosure 7 in the same direction as movement of the head 2. An acceleration feedback circuit 12 which outputs an acceleration feedback signal obtained by arithmetic processing of output signals of these sensors and an adder 13 which adds the output of this circuit 12 and the output of a position control circuit 9 due to position detection error are provided. The acceleration feedback circuit 12 outputs the acceleration feedback signal proportional to the difference between output signals of acceleration sensors 14a and 14b, and this acceleration feedback signal is added to a compensation signal Vx from the position control circuit 9 by the adder 13, and the result is sent to a driving circuit 10 to drive the actuator 6. Thus, position error due to turning disturbance is reduced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明ζ友 情報を配線 再生するディスク装置の改良
に関し 特にヘッドを所定の回動中心軸線のまわりに回
転することにより移動させる回動型ヘッド送り手段を備
えたディスク装置のヘッド位置決め精度が外部からの振
動などにより低下することを、容易に補償できるように
した装置構成に関すも 従来の技術 ディスク装置は 円盤状の情報記録媒体であるディスク
に情報を高速に記録再生するため番! 情報を記録再生
するヘッドをミクロンオーダーの精度で所望のトラック
位置に位置決めする必要があるた数 外部振動に対する
ヘッド位置決め誤差を補正する制御j&  あるいは外
部振動を受は難い構成が必要とされていも 従来のディスク装置の概略構成図を第4図に示す。
[Detailed Description of the Invention] Industrial Application Fields of the Present Invention Regarding improvement of a disk device for wiring and reproducing information Particularly, a rotary head feeding means for moving a head by rotating it around a predetermined rotation center axis Regarding a device configuration that can easily compensate for the head positioning accuracy of a disk device equipped with a disk drive being reduced due to external vibrations, etc., conventional technology disk devices store information on a disk, which is a disc-shaped information recording medium. Now for high-speed recording and playback! It is necessary to position the head for recording and reproducing information at a desired track position with micron-order accuracy. Control for correcting head positioning errors due to external vibrations FIG. 4 shows a schematic configuration diagram of the disk device.

第4図において、 1は情報記録媒体であるディスクで
スピンドルモータ(図示せず)により回転していム り
は前記ディスク上に情報を記録再生するヘッド、 3は
前記ヘッドを所定の回動中心軸線11のまわりに回転す
ることにより所望のトラックへ移動させるロータリーア
ーム 4はロータリーアームに取り付けられたコイ/l
、、  5は磁気回路でコイル4に電流を流すことによ
りコイル4は磁気回路5の磁束によりロータリーアーム
3を回動させる力を発生ずも 前記ディスク1、ヘッド
2及びヘッド送り手段であるロータリーアーム3゜コイ
ル4.磁気回路5から成る回動型アクチュエータ61ヨ
  防塵のため匡体7内に収容されていもそして、目標
トラックで記録媒体上の情報を読み込みもしくは書き込
みする場合!戴 たとえばディスク1のセクターごとに
予め書き込まれた位置情報をヘッド2により読み込へ 
これを位置検出手段である位置検出回路8により位置信
号Xを取り出し これを目標トラックの位置X ref
との差である位置誤差信号dX を束数 これを位置制
御手段である位置制御回路9により位置補償を行(\こ
の補償信号VXを駆動回路10に送りコイル4に電流を
流して回動型アクチュエータを駆動し目標トラック位置
へヘッドを正確に位置決めすムしかしなが収 このよう
な装置構成に対して外部から大きな振動や衝撃が加わっ
た場へ これによりヘッド位置決め誤差をすべて前記位
置制御回路9による位置補償だけでは補償することがで
きずヘッドを目標トラック位置に正確に位置決めするこ
とができなくも このた敦 従来の回動型アクチュエー
タは 実公昭63−3026号公報のようにヘッド2、
ロータリーアーム3およびコイル4から成る回動部分の
重心を回動中心軸線11上になるよう設計することによ
り外部振動を受は難い構造にするようにしていも 発明が解決しようとする課題 しかしなが収 ディスク装置が小型軽量になり、たとえ
ば持ち運びが容品なノート型パーソナルコンピュータ等
に搭載され 使用される場合には外部から加わる振動や
衝撃力(装置を回転させるような力を加える場合があり
、この時は回動部分の重心を回動中心軸線上に設定する
ような構造の改良を施してもヘッド位置決め誤差が生し
 このヘッド位置決め誤差をすべて前記位置制御回路9
による位置補償だけでは補償することができずヘッドを
目標トラック位置に正確に位置決めすることができなく
なム 第2図に 装置を回動させる力の加わる様子を示す。第
2図においてFal〜Fa4はディスク装置の受ける外
乱力を表わす。この外乱力は回動部分の回転中心11に
対して匡体7を並進運動させる力(以下、並進外乱力)
Fbl〜Fb4と回転運動させる力(以下、回動外乱力
)FCI〜FC4とに分けられも ここで、並進外乱力
Cヨ  回動部分の重心を回動中心軸線上に設定するこ
とによりヘッド位置決め誤差が起きないようにできる力
t 回動外乱力ば 回動部分の重心を回動中心軸線上に
設定してもヘッド位置決め誤差が生じるなどディスクに
対する情報の配縁 再生が不可能となる問題があム 本発明は前記問題に対して、外部からの振動や衝撃に起
因するヘッド位置決め誤差の減少を可能とする新規なデ
ィスク装置を提供することを目的とするものであム 課題を解決するための手段 本発明は前記目的を達成するために円盤状の情報記録媒
体と、前記情報記録媒体上に情報を記録もしくは再生す
るヘッドと、前記ヘッドを所定の回動中心軸線のまわり
に回転することにより所望のトラックに移動させる回動
型ヘッド送り手段と、前記情報記録媒体と回動型ヘッド
送り手段を収容する匡体と、前記回動型ヘッド送り手段
の回動中心軸線と前記ヘッドとを結ぶ路面上もしくは略
延長面上の少なくとも2カ所に設置され回動型ヘッド送
り手段によるヘッド移動方向と略同一方向の匡体の加速
度を検出する少なくとも2つの加速度検出手段と各加速
度検出手段の出力信号に比例した加速度帰還信号を出力
する加速度帰還手段と前記加速度帰還手段の出力とヘッ
ドを所望のトラックに位置決めする位置制御手段の出力
とを加算する加算手段とこの加算手段の出力により前記
回動型ヘッド送り手段を駆動する駆動手段とを設けたも
のであム 作用 本発明は前記の様な構成によりつぎのような効果を有す
ム すなわ板 外部からの振動や衝撃を受けた際&二 
回動型ヘッド送り手段の回動中心軸線とヘッドを結ぶ路
面上もしくは略延長面上に設けた匡体の振動を検知する
検出器からの加速度検出信号は 加速度帰還手段により
処理され ヘッド位置決め制御系の制御回路からの補償
信号と加算し 駆動手段に送られ 補償されるたべ 外
部振動に起因するヘッド位置決め誤差が大幅に軽減され
も 実施例 以下本発明の一実施例のディスク装置について、図面を
参照しながら説明すも 第1図は本発明の一実施例を示すものであム第1図にお
いて、 1は情報記録媒体であるディスクでスピンドル
モータ(図示せず)により回転していム 2は前記ディ
スク上に情報を記録再生するヘッド、 3は前記ヘッド
を所定の回動中心軸線11のまわりに回転することによ
り所望のトラックへ移動させるロータリーアーム 4は
ロータリーアームに取り付けられたコイ/l、、  5
は磁気回路でコイル4に電流を流すことによりコイル4
は磁気回路5の磁束によりロータリーアーム3を回動さ
せる力を発生すム 7は前記ディスク1、ヘッド2及び
ヘッド送り手段であるロータリーアーム3.コイル4.
磁気回路5から成る回動型アクチュエータ6を収容する
匡4t、  14 a、  14 b 41前記ヘツド
の移動方向と略同一方向の匡体7の加速度を測定する加
速度検出手段である加速度センサーであム 目標トラックで情報を読み詰みもしくは書き込みを行う
場合は 例え1戴 ディスクlのセクターごとに予め書
き込まれた位置情報をヘッド2により読み込へ これを
位置検出手段である位置検出回路8により位置信号Xを
取り出し これを目標トラックの位置X refとの差
である位置誤差信号dX を求へ これを位置制御手段
である位置制御回路9により位置補償を行匹 この補償
信号Vxを駆動回路10に送りコイル4に電流を流して
ロータリアーム3を駆動し 目標トラック位置へヘッド
を正確に位置決めずも この時外部から匡体7に外乱が
加わった場合 例え(′L 第2図に示す外乱力Fal
〜Fa4が匡体7に加わった時に(よ匡体7を並進運動
させる並進外乱力Fal〜Fa4は回動型アクチュエー
タ6の回動軸を通して回動型アクチュエータ6の回動部
分に作用し 匡体7を回動中心軸線のまわりに回転運動
させる回動外乱力Fcl〜F c 4 U  回動型ア
クチュエータ6には何隻作用を及ぼさない力(匡体7を
回転させも以下、前記並進外乱力と回動外乱力の影響に
ついて、第3図を用いて説明す4 回動型アクチュエー
タ6の回動軸に力Fbが加わると、ヘッド2゜ロータリ
アーム3及びコイル4から成る回動部分15の重心Gに
対してトルクTb1=Fbxdl(dlは回動型アクチ
ュエータの回動中心軸線11と回動部分の重心Gとの距
離)がかがム このトルクTblは回動部分15を回転
させるトルク外乱として影響を及ぼす。したがって、回
動部分15の重心Gを回動中心軸線11上に設定するこ
とにより、回動部分15は並進外乱力の影響を受けない
よう構造的に対応が可能であム また 回動外乱力(戴 匡体7を回動中心軸線11を中
心に回転させも この時のヘッド2の地点での匡体7の
移動加速度αhは たとえば 回動型アクチュエータ6
の回動中心軸線11とヘッド2の延長面上の匡体上に設
置された ヘッド2の移動方向と略同一方向の匡体7の
加速度を検出する2つの加速度センサー14aと14b
により検出される加速度αaaとαabかぺ ah = ((crab−aaa) X d2 ) /
L(但しLはセンサ14a、14b間距ft  d2は
ヘッド2と回動中心軸線11までの距離)で求めること
ができも したがって、前記匡体7のヘッド2の地点で
の移動量)(hlL  αhの2階積分で求められ こ
の匡体7の移動量xhはヘッド2の位置での位置外乱と
して影響すム この位置外乱を打ち消すために必要なト
ルク(−Tb2)ζよ Tb2= (J/d2) x (ci”Xh/d t”
)= (J/L)x (αab−αaa)(但しJは回
動部分のイナーシャ) で求まるので、加速度帰還回路12はこの位置外乱を打
ち消すために必要なトルク(−Tb2)を発生するため
の補償信号Vb2を出力すればよむも この補償信号V
b24;L  駆動回路10の電圧電流変換定数)(v
[A/VL  とコイル4の力定数K t[N/A]と
、回動中心軸線11からコイル4の力発生点までの距離
d3より Vb2=T b/ (KvxKtx d 3)=(J 
X(αab−αaa))/(L xKvxKtx d3
)より求められム したがって、加速度帰還回路12は
加速度センサー14a、14bの出力信号αaa、  
αabの差に比例した加速度帰還信号を出力し加算器】
3により位置制御回路9からの補償信号Vxと加算し 
駆動回路10に送り、回動型アクチュエータを駆動する
ことにより回動外乱による位置誤差を大幅に減少させる
ことができもまた 本発明によれば 第3図のごとくヘ
ッド2、 ロータリアーム3及びコイル4から成る回動
部分15の重心Gと回動中心軸線11とがdlだけずれ
ている場合においても同様に並進外乱力の影響を抑制す
ることができも すなわ板 匡体7の受ける並進外乱力
により匡体7は加速度α1で平行移動するとき回動型ア
クチュエータ6の回動軸も加速度α1で移動すム この
た敢 ヘッド2゜ロータリアーム3及びコイル4から成
る回動部分15の重心Gに対してトルクTbl(=mx
αIXd1)  (但り、mは回動部分の質量)のトル
ク外乱が加わったこととなも ここで、α1は al=  (L2/L)Xaaa+ (Ll/L)Xα
ab(但LLI、L2は回動中心軸線11からセンサー
11a、llbまでの距離) で求められるの六 加速度帰還回路12はトルク外乱T
blを打ち消すために必要なトルク(−Tbl)を発生
するための補償信号Vblを出力すればよt〜この補償
信号VbHi  回動外乱力による影響を抑制する場合
と同様に求められるので、加速度帰還回路12は加速度
センサー14a、14bの出力信号αaa、  αab
から回動外乱力と並進外乱力による影響を打ち消す加速
度帰還信号vbを出力することができも また 前記実施例でζよ 2つの加速度センサーを回動
型アクチュエータの回動中心軸線11とヘッド2とを結
ぶ略延長面上の匡体の上に設置しため(例えば 2つの
加速度センサーの11つもしくは2つともを回動中心軸
線11とヘッド2とを結ぶ路面上に設置しても良く、同
等な効果があることは明かであム な叙 前記実施例では回動型アクチュエータの回動は微
少であるとして説明した力(大きく回動する場合CEL
  加速度センサーは 回動範囲の中心位置付近に位置
した場合のヘッド位置をもとに回動中心軸線とヘッドと
の路面上もしくは略延長面上に設置すれば加速度検出誤
差が少なくなることも明かであも 発明の効果 本発明は前記実施例より明かなように回動型アクチュエ
ータの回動中心軸線とヘッドとを結ぶ路面上もしくは略
延長面上の置体上の少なくとも2カ所に設置され 前記
回動型アクチュエータによるヘッドの移動方向と略同一
方向の匡体の加速度を検出する少なくとも2つの加速度
センサーと、各加速度センサーの出力信号を演算処理し
た加速度帰還信号を出力する加速度帰還回路と前記加速
度帰還回路の出力と位置検出誤差による位置制御回路の
出力とを加算する加算器とこの加算器の出力により前記
回動型アクチュエータを駆動する駆動回路を備えたディ
スク装置であり、装置の受ける外乱による位置決め精度
の悪化を抑制するできるという利点を有すa
In FIG. 4, 1 is a disk that is an information recording medium, which is rotated by a spindle motor (not shown), and 3 is a head that records and reproduces information on the disk; 3 is a disk that is an information recording medium; and 3, a disk that is an information recording medium; A rotary arm that moves to a desired track by rotating around 11. 4 is a carp attached to the rotary arm.
,, 5 is a magnetic circuit, and by passing a current through the coil 4, the coil 4 generates a force to rotate the rotary arm 3 due to the magnetic flux of the magnetic circuit 5. 3° coil 4. Even if the rotary actuator 61 consisting of the magnetic circuit 5 is housed in the enclosure 7 for dust-proofing, when reading or writing information on the recording medium at the target track! For example, the position information written in advance for each sector of disk 1 is read by head 2.
The position detection circuit 8, which is a position detection means, extracts a position signal
The position error signal dX, which is the difference between However, the actuator is driven to accurately position the head to the target track position.However, this is a place where large vibrations or shocks are applied from the outside to such a device configuration.This eliminates all head positioning errors by the position control circuit 9. Although the head cannot be accurately positioned at the target track position due to positional compensation alone, the conventional rotary actuator has a head 2,
However, even if the center of gravity of the rotating part consisting of the rotary arm 3 and the coil 4 is designed to be on the rotation center axis 11 so that the structure is difficult to receive external vibrations, the problem that the invention attempts to solve still remains. When storage disk devices become smaller and lighter and are used, for example, in notebook-type personal computers that are easy to carry, external vibrations and impact forces (such as forces that rotate the device may be applied) may occur. In this case, even if the structure is improved to set the center of gravity of the rotating part on the rotation center axis, a head positioning error will occur, and this head positioning error will be absorbed by the position control circuit 9.
Figure 2 shows how a force is applied to rotate the device. In FIG. 2, Fal to Fa4 represent disturbance forces applied to the disk device. This disturbance force is a force that causes the casing 7 to move in translation with respect to the rotation center 11 of the rotating part (hereinafter referred to as translational disturbance force).
It can be divided into Fbl to Fb4 and force for rotational movement (hereinafter referred to as rotational disturbance force) FCI to FC4.Here, translational disturbance force C is used to position the head by setting the center of gravity of the rotating part on the rotation center axis. Even if the center of gravity of the rotating part is set on the rotation center axis, errors in head positioning may occur, and problems such as alignment of information on the disk and reproduction of information may become impossible. In order to solve the above problems, the present invention aims to provide a new disk device that can reduce head positioning errors caused by external vibrations and shocks. In order to achieve the above object, the present invention provides a disc-shaped information recording medium, a head for recording or reproducing information on the information recording medium, and a method for rotating the head around a predetermined central axis of rotation. a rotary head feeding means for moving the rotary head to a desired track; a casing housing the information recording medium and the rotary head feeding means; and a rotation center axis of the rotary head feeding means and the head. At least two acceleration detecting means installed at at least two places on the connecting road surface or substantially on the extending surface and detecting the acceleration of the casing in substantially the same direction as the head movement direction by the rotary head feeding means, and the output of each acceleration detecting means. acceleration feedback means for outputting an acceleration feedback signal proportional to the signal; addition means for adding the output of the acceleration feedback means and the output of the position control means for positioning the head on a desired track; The present invention has the following effects due to the above-described structure. two
Acceleration detection signals from a detector that detects vibrations of a casing installed on the road surface or approximately on an extended surface connecting the rotating center axis of the rotating head feeding means and the head are processed by the acceleration feedback means, and the head positioning control system The signal is added to the compensation signal from the control circuit of the controller and is sent to the drive means for compensation.The head positioning error caused by external vibration is greatly reduced. FIG. 1 shows one embodiment of the present invention. In FIG. 1, 1 is a disk which is an information recording medium, and is rotated by a spindle motor (not shown). 2 is the above-mentioned disk. A head for recording and reproducing information on a disk; 3 a rotary arm for moving the head to a desired track by rotating it around a predetermined rotation center axis 11; 4 a coil attached to the rotary arm; 5
is a magnetic circuit that causes a current to flow through the coil 4.
7 generates a force for rotating the rotary arm 3 by the magnetic flux of the magnetic circuit 5. 7 indicates the disk 1, the head 2, and the rotary arm 3 which is a head feeding means. Coil 4.
A box 4t, 14a, 14b 41 houses a rotary actuator 6 consisting of a magnetic circuit 5; When reading or writing information on the target track, for example, the head 2 reads the position information written in advance for each sector of the disk L. This is sent to the position detection circuit 8, which is the position detection means, to signal the position X. This is used to obtain a position error signal dX which is the difference from the target track position 4 drives the rotary arm 3 and the head is not accurately positioned to the target track position.If a disturbance is applied to the casing 7 from the outside at this time, for example ('L), the disturbance force Fal shown in Fig. 2
When ~Fa4 is applied to the enclosure 7 (the translational disturbance force Fal~Fa4 that causes the enclosure 7 to move in translation acts on the rotating portion of the rotating actuator 6 through the rotation axis of the rotating actuator 6, the enclosure A rotational disturbance force Fcl~Fc4U that rotates the casing 7 around the rotation center axis A force that does not act on the rotary actuator 6 (hereinafter referred to as the translational disturbance force even if the casing 7 is rotated) The influence of the rotational disturbance force will be explained with reference to FIG. Torque Tb1 = Fbxdl (dl is the distance between the rotation center axis 11 of the rotation type actuator and the gravity center G of the rotation part) is applied to the center of gravity G. This torque Tbl is the torque disturbance that causes the rotation part 15 to rotate. Therefore, by setting the center of gravity G of the rotating portion 15 on the rotation center axis 11, the rotating portion 15 can be structurally prevented from being affected by translational disturbance force. In addition, even if the rotational disturbance force (the rotational disturbance force) causes the housing 7 to rotate around the rotational center axis 11, the moving acceleration αh of the housing 7 at the point of the head 2 at this time is, for example, the rotational actuator 6.
Two acceleration sensors 14a and 14b are installed on the casing on the rotation center axis 11 of the head 2 and the extension surface of the head 2, and detect the acceleration of the casing 7 in substantially the same direction as the moving direction of the head 2.
Acceleration αaa and αabcapah = ((crab-aaa) X d2) /
L (however, L is the distance between the sensors 14a and 14b, ft, and d2 is the distance between the head 2 and the rotation center axis 11). Therefore, the amount of movement of the casing 7 at the point of the head 2) (hlL αh The amount of movement xh of the enclosure 7 is determined by the second-order integral of ) x (ci"Xh/d t"
) = (J/L) This compensation signal Vb2 should be output.
b24; L voltage-current conversion constant of drive circuit 10) (v
From [A/VL, the force constant K t [N/A] of the coil 4, and the distance d3 from the rotation center axis 11 to the force generation point of the coil 4, Vb2 = T b/ (KvxKtx d 3) = (J
X(αab-αaa))/(L xKvxKtx d3
) Therefore, the acceleration feedback circuit 12 outputs the output signals αaa of the acceleration sensors 14a and 14b,
Adder that outputs an acceleration feedback signal proportional to the difference between αab]
3, it is added to the compensation signal Vx from the position control circuit 9.
By sending the signal to the drive circuit 10 and driving the rotary actuator, position errors due to rotational disturbance can be significantly reduced.According to the present invention, as shown in FIG. 3, the head 2, rotary arm 3, and coil 4 Even if the center of gravity G of the rotating part 15 and the rotation center axis 11 are deviated by dl, the influence of the translational disturbance force can be similarly suppressed. Therefore, when the housing 7 moves in parallel with an acceleration α1, the rotation axis of the rotary actuator 6 also moves with an acceleration α1. On the other hand, torque Tbl (=mx
αIXd1) (where m is the mass of the rotating part). Here, α1 is al= (L2/L)Xaaa+ (Ll/L)Xα
ab (However, LLI, L2 is the distance from the rotation center axis 11 to the sensors 11a and llb) The acceleration feedback circuit 12 is calculated by the torque disturbance T
It is necessary to output a compensation signal Vbl to generate the torque (-Tbl) necessary to cancel bl. This compensation signal VbHi is obtained in the same way as when suppressing the influence of rotational disturbance force, so acceleration feedback The circuit 12 receives the output signals αaa and αab of the acceleration sensors 14a and 14b.
It is also possible to output an acceleration feedback signal vb that cancels out the effects of rotational disturbance force and translational disturbance force. (For example, one or both of the two acceleration sensors may be installed on the road surface connecting the rotation center axis 11 and the head 2, and the same It is obvious that this effect is effective. In the above embodiment, the rotation of the rotary type actuator is explained as being slight (in the case of large rotation, CEL
It is also clear that the acceleration detection error will be reduced if the acceleration sensor is installed on the road surface or approximately on the extension surface between the rotation center axis and the head based on the head position when it is located near the center of the rotation range. Effects of the Invention As is clear from the embodiments described above, the present invention is provided in at least two locations on a mounting body on a road surface or a substantially extended surface connecting the rotation center axis of the rotation type actuator and the head. at least two acceleration sensors that detect acceleration of the casing in substantially the same direction as the moving direction of the head by the dynamic actuator; an acceleration feedback circuit that outputs an acceleration feedback signal obtained by processing the output signal of each acceleration sensor; and the acceleration feedback. This disk device is equipped with an adder that adds the output of the circuit and the output of the position control circuit due to a position detection error, and a drive circuit that drives the rotary actuator using the output of this adder, and the disk device is equipped with a drive circuit that drives the rotary actuator using the output of the adder. A has the advantage of suppressing deterioration of accuracy.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例におけるディスク装置の概略
ブロック医 第2図はディスク装置の受ける外乱を示し
た外乱説明医 第3図は本発明の詳細な説明する機能説
明医 第4図は従来のディスク装置を一部切欠いて示し
た構成図であal・・・ディス久 2・ ・ヘッド、3
・・ロータリアーJ−,6・・・回動型アクチュエータ
。 7・・・匡体 8・・・位置検出回路 9・・・位置制
御回111a、 llb・・・加速度センサー、 12
・・・加速度帰還回迄 代理人の氏名 弁理士 小鍜治 明 ほか2名 第 図 第 図 菓 図
FIG. 1 is a schematic block diagram of a disk device according to an embodiment of the present invention. FIG. 2 is a disturbance explanation diagram showing disturbances received by the disk device. FIG. 3 is a functional explanation diagram showing detailed explanations of the present invention. This is a partially cutaway configuration diagram of a conventional disk device.
...Rotaria J-, 6...Rotary type actuator. 7... Housing 8... Position detection circuit 9... Position control circuit 111a, llb... Acceleration sensor, 12
・・・Name of agent until acceleration return Patent attorney Akira Okaji and 2 others

Claims (2)

【特許請求の範囲】[Claims] (1)円盤状の情報記録媒体と、前記情報記録媒体上に
情報を記録もしくは再生するヘッドと、前記ヘッドを所
定の回動中心軸線のまわりに回転することにより所望の
トラックに移動させる回動型ヘッド送り手段と、前記情
報記録媒体と回動型ヘッド送り手段を収容する匡体と、
前記ヘッド位置に対応する位置信号を形成する位置検出
手段と、前記位置信号により所望のトラックに前記ヘッ
ドを位置決めする位置制御手段と、前記回動型ヘッド送
り手段の回動中心軸線と前記ヘッドとを結ぶ路面上もし
くは略延長面上の少なくとも2ヵ所に設置された少なく
とも2つの加速度検出手段を備えたディスク装置。
(1) A disc-shaped information recording medium, a head for recording or reproducing information on the information recording medium, and rotation for moving the head to a desired track by rotating it around a predetermined rotation center axis. a die head feeding means; a casing housing the information recording medium and the rotary head feeding means;
a position detection means for forming a position signal corresponding to the head position; a position control means for positioning the head on a desired track based on the position signal; and a rotation center axis of the rotary head feeding means and the head. A disk device comprising at least two acceleration detecting means installed at at least two locations on a road surface or substantially an extended surface connecting the two.
(2)加速度検出手段は、回動型ヘッド送り手段による
ヘッドの移動方向と略同一方向の匡体の加速度を検出し
、各加速度検出手段の出力信号を演算処理した加速度帰
還信号を出力する加速度帰還手段と、前記加速度帰還手
段と位置制御手段の出力を加算する加算手段と、この加
算手段の出力により前記回動型ヘッド送り手段を駆動す
る駆動手段とを備えたことを特徴とする請求項1記載の
ディスク装置。
(2) The acceleration detection means detects the acceleration of the casing in substantially the same direction as the moving direction of the head by the rotary head feeding means, and outputs an acceleration feedback signal obtained by processing the output signals of each acceleration detection means. Claim characterized by comprising a feedback means, an addition means for adding the outputs of the acceleration feedback means and the position control means, and a drive means for driving the rotary head feeding means by the output of the addition means. 1. The disk device according to 1.
JP24431290A 1990-09-14 1990-09-14 Disk device Pending JPH04123374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24431290A JPH04123374A (en) 1990-09-14 1990-09-14 Disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24431290A JPH04123374A (en) 1990-09-14 1990-09-14 Disk device

Publications (1)

Publication Number Publication Date
JPH04123374A true JPH04123374A (en) 1992-04-23

Family

ID=17116861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24431290A Pending JPH04123374A (en) 1990-09-14 1990-09-14 Disk device

Country Status (1)

Country Link
JP (1) JPH04123374A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521772A (en) * 1993-11-30 1996-05-28 International Business Machines Corporation Disk drive with accerleration rate sensing
JP2002133804A (en) * 2000-10-27 2002-05-10 Hitachi Ltd Disk device
JP2004288294A (en) * 2003-03-24 2004-10-14 Clarion Co Ltd On-vehicle equipment, protecting device, protecting method, and protection control program
US7206264B1 (en) * 1999-11-17 2007-04-17 Robert Bosch Gmbh Method for regulating the tracking of a scanning device and drive for the same
WO2008139586A1 (en) * 2007-05-10 2008-11-20 Fujitsu Limited Storage device and control circuit
GB2500490A (en) * 2012-03-22 2013-09-25 HGST Netherlands BV Disc drive with three sensors for rotational and linear vibration compensation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521772A (en) * 1993-11-30 1996-05-28 International Business Machines Corporation Disk drive with accerleration rate sensing
US7206264B1 (en) * 1999-11-17 2007-04-17 Robert Bosch Gmbh Method for regulating the tracking of a scanning device and drive for the same
JP2002133804A (en) * 2000-10-27 2002-05-10 Hitachi Ltd Disk device
JP2004288294A (en) * 2003-03-24 2004-10-14 Clarion Co Ltd On-vehicle equipment, protecting device, protecting method, and protection control program
JP4486786B2 (en) * 2003-03-24 2010-06-23 クラリオン株式会社 Protective device
WO2008139586A1 (en) * 2007-05-10 2008-11-20 Fujitsu Limited Storage device and control circuit
GB2500490A (en) * 2012-03-22 2013-09-25 HGST Netherlands BV Disc drive with three sensors for rotational and linear vibration compensation
GB2500490B (en) * 2012-03-22 2016-11-02 HGST Netherlands BV Magnetic recording disk drive with three sensors for rotational and linear vibration compensation

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