JPS6458003A - Positioning system - Google Patents
Positioning systemInfo
- Publication number
- JPS6458003A JPS6458003A JP21435387A JP21435387A JPS6458003A JP S6458003 A JPS6458003 A JP S6458003A JP 21435387 A JP21435387 A JP 21435387A JP 21435387 A JP21435387 A JP 21435387A JP S6458003 A JPS6458003 A JP S6458003A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- line
- feedforward
- approximation
- power constant
- 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
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
- Control Of Position Or Direction (AREA)
Abstract
PURPOSE:To realize the stable feedforward control with high performance by using a differentiator, a divider, a feedforward approximation signal generating circuit, and a multiplier. CONSTITUTION:A differentiator 2 differentiates the measurement speed signal set on a signal line 1 and showing the actual speed of a magnetic head and amplifies said signal with the gain proportional to the mass of a movable part so that the drive signal showing the driving force of a driver 37 is obtained on a signal line 3. A divider 55 divides the drive signal set on the line 3 by a current signal set on a signal line 4 and proportional to a drive current so that the power constant signal of a voice coil motor set at each voice coil position is obtained o a signal line 6 during a seeking action. A feedforward approximation signal generating circuit 11 produces the feedforward approximation signal on a signal line 12. Then a multiplier 13 amplifies the feedforward approximation signal set on the line 12 together with the linear change of the gain based on the power constant signal set on the line 6 so that the feedforward control signal is obtained with correction given to the positional deviation of the power constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21435387A JPS6458003A (en) | 1987-08-28 | 1987-08-28 | Positioning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21435387A JPS6458003A (en) | 1987-08-28 | 1987-08-28 | Positioning system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6458003A true JPS6458003A (en) | 1989-03-06 |
Family
ID=16654369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21435387A Pending JPS6458003A (en) | 1987-08-28 | 1987-08-28 | Positioning system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6458003A (en) |
-
1987
- 1987-08-28 JP JP21435387A patent/JPS6458003A/en active Pending
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