JPS6458003A - Positioning system - Google Patents

Positioning system

Info

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
Application number
JP21435387A
Other languages
Japanese (ja)
Inventor
Doshu Suzuki
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP21435387A priority Critical patent/JPS6458003A/en
Publication of JPS6458003A publication Critical patent/JPS6458003A/en
Pending legal-status Critical Current

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.
JP21435387A 1987-08-28 1987-08-28 Positioning system Pending JPS6458003A (en)

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)

Similar Documents

Publication Publication Date Title
DE3686700D1 (en) ELECTRO-MAGNETIC DRIVING SWING MIRROR.
GB1519658A (en) Position control arrangements
JPS576591A (en) Direct current brushless motor and drive controller thereof
EP0207172A4 (en) Drive control system for servo motors.
GB1400546A (en) Driving system for electric car
EP0200959A3 (en) Stepping motor control system
JPS5249007A (en) Magnetic head driving device
JPS6458003A (en) Positioning system
US4147968A (en) Stepper motor control
JPS5674080A (en) Linear pulse motor
US4709199A (en) Velocity feedback control of step motors
EP0597118A4 (en) Control method for synchronous motor.
JPS55155572A (en) Linear tracking arm driving gear
JPS56124170A (en) System for driving magnetic disc
JPS5760527A (en) Fine adjustment for rotating head
JPS54156112A (en) Driving circuit for motors
JPS6442081A (en) Digital servo speed control system
JPS57182202A (en) Automatic controller
JPS6454504A (en) Control circuit for position control system
JPS57193908A (en) Speed controlling device for electric motor vehicle
JPS56130865A (en) Magnetic disc device
JPS6489088A (en) Carriage driving/control circuit for magnetic disk device
JPS56103712A (en) Positioning mechanism
JPS6481697A (en) Position control device
SU748772A1 (en) Gearhead-free follow-up drive