JPS586559A - Magnetic disc device - Google Patents
Magnetic disc deviceInfo
- Publication number
- JPS586559A JPS586559A JP10292081A JP10292081A JPS586559A JP S586559 A JPS586559 A JP S586559A JP 10292081 A JP10292081 A JP 10292081A JP 10292081 A JP10292081 A JP 10292081A JP S586559 A JPS586559 A JP S586559A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- phase
- output
- differential amplifier
- head
- 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
Links
- 239000002131 composite material Substances 0.000 claims description 11
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Position Or Direction (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はセクタサー献方式の磁気ディスタ装置に係り、
データ面上の位置信号とサー電面上の位置信号とを組み
合せた合成位蓋信号によってヘッドの位置制御を行う磁
気ディスク装置に関する・セクタサーが方式の磁気ディ
スク装置では、ディスクのデータ面上の位置信号は間隔
をおいて書かれており、この様な一一タ面上の離散的デ
ータを読み取って賃ンｌルし、ヘラＩの位置決め制−に
用いている。しかしながら、この離散的データは、信号
帯域が低（そのままでは使用できず、合成信号器を用い
ているが、その出力には位相連れが生じてしまっていた
・すなわち、離散的データは位相連れ要素を有している
。上に合成信号器で低域フィルタを用いるため位相遅れ
が位置制御に影響を及はし、目的位置型でサーがヘラｒ
を移動させるのに時間を要し、また、高精度なヘッドの
位置決めが困−であった。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sector dedication type magnetic disk drive.
Regarding a magnetic disk device that controls the position of the head using a composite position signal that combines a position signal on the data surface and a position signal on the sensor surface.In a magnetic disk device using a sector sensor method, the position on the data surface of the disk is The signals are written at intervals, and such discrete data on the single plane is read and plotted, and is used for positioning the spatula I. However, this discrete data has a low signal band (it cannot be used as it is, and a synthesized signal generator is used, but the output has phase interlocking. In other words, the discrete data has a phase interlocking element. Since a low-pass filter is used in the synthesizer, the phase delay affects the position control.
It takes time to move the head, and it is difficult to position the head with high precision.
本発明は、上述の従来の欠点を解決するものでヘッド位
置決めが高速に行え、かつ高精度に位置決めできる磁気
ディスク装置を提供することである。The present invention solves the above-mentioned conventional drawbacks and provides a magnetic disk device that can perform head positioning at high speed and with high precision.
本発明の特徴とするところは、セフ＃賃−？方式の磁気
ディスタ装置においてデータ面から得られる位置信号の
位相を進ませる位相進み回路を有し、該出力信号の低域
成分とサーｆ面の位置信号の高域成分を加え合わせｔ合
成位置信号によってヘッドの位置側−を行なう磁気ディ
スク装置を提供することである。The features of the present invention are: The magnetic disk device of this type has a phase advance circuit that advances the phase of the position signal obtained from the data surface, and the low frequency component of the output signal and the high frequency component of the position signal of the surf f surface are added to generate a composite position signal. An object of the present invention is to provide a magnetic disk device that performs head positioning.
以下本発明の一実施例を図面を参照して詳細に説明する
。An embodiment of the present invention will be described in detail below with reference to the drawings.
第１図においてデータ面位置信号Ｖ工 は抵抗Ｒ１に接
続され、抵抗Ｒ１の他端は抵抗Ｒ１と差動増幅器１のプ
ラス入力２に接続される。抵抗Ｒ３の他端は接地される
。差動増幅器ｌの出力には抵抗Ｒ３ｒ Ｒ４ｅ Ｒ８が
接続され、そのマイナス人力３は抵抗Ｒ３の他端と、抵
抗Ｒ６が接続され、抵抗Ｒ６の他端はコンデンサＯｌに
接続され、コンデンサＯ１の他端は接地される。サーボ
面位置データ人力Ｎ、Ｎはそれぞれ抵抗Ｒγ、Ｒ８を介
して差動増幅器４のマイナス人力５に加えられる。差動
増幅器４の出力１２は抵抗Ｒ聰を介して差動増幅器４の
マイナス人力５に入り、差動増幅器４のグラス人力１５
は抵抗Ｒ９を介して接地される。また、差動増幅器４の
出力１２はコンデンサ０３ の一端に接続され、この
コンデンサ０露の他端は抵抗Ｒ９を介して、アナリグス
イッチ６の出カフと差動増幅器８のプラス入力９．差動
増幅器１０のプラス人力１１に入る。サーボ面位置信号
人力Ｑ、可はそれぞれ’１０ ｅ ｎｌｌを介して差動
増幅器１３のマイナス入力１４に入る。差動増幅器１３
の出力１７は、抵抗１８を介して前記差動増幅器１３の
マイナス人力１４に加えられる。差動増幅器１３のグラ
ス人力１６は抵抗Ｒ１２を介して接地される。また差動
増幅器１３の出力１７はコンデンサ０３ に入り、こ
のコンデンサＣ３の他端は抵抗Ｒ１４を介してスイッチ
６の出力１８と差動増幅器１８のグラス人力１９に入る
。差動増幅器８の出力２０は差動増幅器８のマイナス人
力２１とスイッチ６の人力２２に接地されている。差動
増幅器１８の出力２３は差動増幅器１８のマイナス人力
２４とスイッチ６の入力２５に接続されている。差動増
幅器１０の出力２６は抵抗Ｒ１５を介して差動増幅器ｌ
Ｏのマイナス人力２７と合成位置信号出力端子に接続さ
れる。ヒステリシスコンパレータカラノ入力２８はスイ
ッチ６の制御端子２９とインバータ３１を介してスイッ
チ６の制御端子３０に接続されている。第１［の点線内
が位相進み補償回路Ｔである。データ面信号Ｖ工 は位
相進み回路Ｔで位相が進み、抵抗ｎ、、 Ｉ Ｒ４を介
して点Ｎ／ 、 Ｑ／に出力される。差動増幅器４．１
３の出力側から見た場合、合成信号はそれぞれ０２Ｒ４
ｅ ０３Ｒ５から成る高域通過フィルタとなっており、
Ｍ’ｍＱ’にはＮｉ１ＱＱの信号の高帯域成分が出力さ
れる。また差動増幅器１の出力側から見た場合、合成信
号器はＣｊｌＲ４ｓ Ｃ３Ｒ３の低域通過フィルタとな
っている。In FIG. 1, the data plane position signal V is connected to a resistor R1, and the other end of the resistor R1 is connected to the resistor R1 and the positive input 2 of the differential amplifier 1. The other end of resistor R3 is grounded. Resistors R3r R4e R8 are connected to the output of the differential amplifier l, and the negative power 3 is connected to the other end of the resistor R3 and the resistor R6, the other end of the resistor R6 is connected to the capacitor Ol, and the other end of the resistor R6 is connected to the other end of the resistor R3. The end is grounded. The servo surface position data human power N and N are applied to the negative human power 5 of the differential amplifier 4 via resistors Rγ and R8, respectively. The output 12 of the differential amplifier 4 enters the negative power 5 of the differential amplifier 4 via the resistor R, and the output 12 of the differential amplifier 4 enters the negative power 15 of the differential amplifier 4.
is grounded via resistor R9. The output 12 of the differential amplifier 4 is connected to one end of the capacitor 03, and the other end of the capacitor 03 is connected to the output cap of the analysis switch 6 and the positive input 9. of the differential amplifier 8 via a resistor R9. It enters the positive power 11 of the differential amplifier 10. The servo surface position signals Q and Q enter the negative input 14 of the differential amplifier 13 via '10 e nll, respectively. Differential amplifier 13
The output 17 of is applied to the negative power 14 of the differential amplifier 13 via a resistor 18. The glass input 16 of the differential amplifier 13 is grounded via a resistor R12. Further, the output 17 of the differential amplifier 13 is input to a capacitor 03, and the other end of this capacitor C3 is input to the output 18 of the switch 6 and the glass input 19 of the differential amplifier 18 via a resistor R14. The output 20 of the differential amplifier 8 is grounded to the negative power 21 of the differential amplifier 8 and the power 22 of the switch 6 . The output 23 of the differential amplifier 18 is connected to the negative power 24 of the differential amplifier 18 and the input 25 of the switch 6. The output 26 of the differential amplifier 10 is connected to the differential amplifier l via a resistor R15.
It is connected to the negative human power 27 of O and the composite position signal output terminal. Hysteresis comparator Calano input 28 is connected to control terminal 30 of switch 6 via control terminal 29 of switch 6 and inverter 31 . The phase lead compensation circuit T is inside the first dotted line. The phase of the data plane signal V is advanced by the phase advance circuit T, and is outputted to points N/ and Q/ via resistors n, IR4. Differential amplifier 4.1
When viewed from the output side of 3, the composite signal is 02R4 respectively.
It is a high-pass filter consisting of e 03R5,
The high band component of the Ni1QQ signal is output to M'mQ'. Furthermore, when viewed from the output side of the differential amplifier 1, the composite signal device is a CjlR4s C3R3 low-pass filter.
そして差動増幅器１０にこれら２つの信号の和が合成位
置信号として表われる。したがって合成位置信号はデー
タ面の位置信号と一致した、連続したサーボ面位置信号
で周波数帯域を改善した信号となる。なおサーボ面位置
信号Ｍ、Ｍは前段で切り変えられて差動増幅４へＮ又は
ｉが加えられる。The sum of these two signals then appears in the differential amplifier 10 as a composite position signal. Therefore, the composite position signal is a continuous servo surface position signal that matches the data surface position signal and has an improved frequency band. Note that the servo surface position signals M and M are switched at the previous stage and N or i is added to the differential amplifier 4.
信号Ｑ、可についても同様である。さらにスイッチ６は
差動出力１２．１７のうち一方の位置信号が線形である
部分を適訳している。（位置信号ＮＱは位相が９０°異
なっている。）
前述で明らかな様にデータ面から得られる位置信号を位
相補償回路に入力させ、位相を進ませた後に合成位置信
号の加算器へ入力する。加算器の十Ｔ８／ で
あり連続的な入
物性＋２ ／（Ｔ８＋１） （Ｔ８＋１）力信号
であれば位相差は生じない。従って前述の位相補償の意
味は離散的な位置信号の固有の位相遅れとフィルタによ
って生じる位相遅れを取り除いた点にある。The same applies to the signals Q and OK. Furthermore, the switch 6 appropriately translates the portion of the differential output 12.17 in which one of the position signals is linear. (The position signals NQ have a phase difference of 90°.) As is clear from the above, the position signal obtained from the data plane is input to the phase compensation circuit, and after advancing the phase, it is input to the adder of the combined position signal. . If the adder is T8/ and the input property is continuous +2/(T8+1) (T8+1), no phase difference will occur. Therefore, the meaning of the above-mentioned phase compensation is to remove the inherent phase delay of the discrete position signal and the phase delay caused by the filter.
第２図は位相進み補償回路Ｔの周波数特性を示す。２は
伝達関数でありｚ−０／ｖ で表わされる。FIG. 2 shows the frequency characteristics of the phase lead compensation circuit T. 2 is a transfer function and is expressed as z-0/v.
工
横軸は周波数、縦軸は伝達関数の位相成分Ｃと伝達関数
２の絶対値ＩＺＩを示す。The horizontal axis shows the frequency, and the vertical axis shows the phase component C of the transfer function and the absolute value IZI of the transfer function 2.
第３図は従来の方式の合成信号出力と本発明の実施装置
における合成信号出力とを示す。横軸Ｘは時隨又は位−
１縦軸Ｖは電圧をそれぞれ示す。FIG. 3 shows the combined signal output of the conventional system and the combined signal output of the apparatus implementing the present invention. The horizontal axis X is time or position.
1 The vertical axis V indicates voltage.
（ａ） Ｉ （１））とを比べると明らかなように本発
明の実施例では入力データすなわちデータ面信号と合成
信号はほぼ一致している。しかし従来の方式では合成信
号が遅れている。As is clear from a comparison with (a) I (1)), in the embodiment of the present invention, the input data, that is, the data surface signal, and the composite signal almost match. However, in the conventional method, the composite signal is delayed.
以上述べた様に、本発明によればヘッド位置制御に用い
る合成信号とデータ面から得られる位置信号の位相がほ
ぼ等しくなり、各々のデータヘッドの切り換え時に生じ
るオフセット補償のための整定時間が小さくなるばかり
でなく位置制御に入第２図
才３図As described above, according to the present invention, the phases of the composite signal used for head position control and the position signal obtained from the data surface are almost equal, and the settling time for offset compensation that occurs when switching each data head is reduced. It not only becomes possible to control the position, but also enters into position control.
Claims (1)
面から得られる位置信号の位相を進ませる位相進み回路
を有し、ｉＩ！出力信号の低域成分とす一ポ面の位置信
号の高域成分を加え合わせた合成位置偏量によってヘッ
ドの位置制御を行うことを特徴と、〜た磁気ディスク装
置。A sector sensor type magnetic disk device has a phase advance circuit that advances the phase of a position signal obtained from a data surface, and has an iI! What is claimed is: 1. A magnetic disk drive characterized in that head position is controlled by a composite position deviation amount obtained by adding a low frequency component of an output signal and a high frequency component of a position signal of one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10292081A JPS586559A (en) | 1981-06-30 | 1981-06-30 | Magnetic disc device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10292081A JPS586559A (en) | 1981-06-30 | 1981-06-30 | Magnetic disc device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS586559A true JPS586559A (en) | 1983-01-14 |
Family
ID=14340289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10292081A Pending JPS586559A (en) | 1981-06-30 | 1981-06-30 | Magnetic disc device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS586559A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0295600U (en) * | 1989-01-18 | 1990-07-30 | ||
| US6783669B1 (en) | 2000-03-10 | 2004-08-31 | Sekisui Aqua Systems Co., Ltd. | Rotating disk type sewage treatment device |
-
1981
- 1981-06-30 JP JP10292081A patent/JPS586559A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0295600U (en) * | 1989-01-18 | 1990-07-30 | ||
| US6783669B1 (en) | 2000-03-10 | 2004-08-31 | Sekisui Aqua Systems Co., Ltd. | Rotating disk type sewage treatment device |
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