Dynamic system control method

• US 20010052035A1
• Filed: 06/04/2001
• Published: 12/13/2001
• Est. Priority Date: 03/04/1999
• Status: Active Grant

• Current Assignee: Kenneth Pasch, Mark Tanquary, Neil Singer
• Original Assignee: Kenneth Pasch, Mark Tanquary, Neil Singer
• Inventors: Pasch, Kenneth, Tanquary, Mark, Singer, Neil
• Granted Patent: US 6,560,658 B2
• Time in Patent Office: Days
• US Class Current: 710/5
• CPC Class Codes: G11B 5/5556 with track following after a "seek"

Abstract

Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial fraction expansion equation model of the system so as to reduce vibrations to specific levels. Another technique comprises shaping a command determined using the partial fraction expansion equation model to produce a desired output. The entire command may be shaped or only selected portions thereof which produce vibrations. Another technique involves commanding in current to produce saturation in voltage. By doing this, it is possible to command voltage switches. The times at which the switches occur can be set to reduce system vibrations. Other techniques are also provided. These include varying transient portions at the beginning, middle and/or end of a move and using Posicast inputs, among others.

Claims

1. A user interface operating a data storage device, the user interface being capable of altering a seek time of the data storage device and an acoustic noise level of the data storage device in inverse relation by changing seek trajectory shape.

2. The user interface of

claim 1

in which the user interface is an electromechanical switch.

3. The user interface of

claim 2

wherein the electromechanical switch is a jumper.

4. The user interface of

claim 1

wherein the user interface is a command.

5. The user interface of

claim 1

wherein the user interface is a graphical user interface.

6. The user interface of

claim 5

comprising a sliding bar which moves along a continuum on which data storage device acoustic noise level and seek time vary inversely, the continuum including a first end comprising a high acoustic noise level/low seek time and a second end comprising a low acoustic noise level/high seek time.

7. The user interface of

claim 5

further comprising a display area which displays discrete values corresponding to the acoustic noise level and/or the seek time of the data storage device.

8. The user interface of

claim 5

comprising discrete values which are selectable to alter the acoustic noise level and/or the seek time of the storage data device.

9. The user interface of claims 1-5 wherein settings of the user interface override previous settings in the data storage device.

10. The user interface of

claim 5

comprising a preview setting, the preview setting causing the data storage device to operate using an acoustic noise level set in the user interface.

11. A method of controlling operation of a data storage device comprising:

providing a user interface for controlling a seek time of the data storage device and an acoustic noise level of the data storage device in inverse relation;

altering settings in the user interface for the seek time and the acoustic noise level of the data storage device; and

outputting commands to the data storage device to alter seek trajectory shape.

12. A data storage device comprising a user interface capable of altering seek time of the data storage device and acoustic noise level of the data storage device in inverse relation by changing seek trajectory shape.

13. The data storage device of

claim 12

wherein the user interface is an electromechanical switch.

14. The data storage device of

claim 13

wherein the electromechanical switch is a jumper.

15. The data storage device of

claim 12

wherein the user interface is a graphical user interface.

16. The data storage device of

claim 12

wherein the user interface is a command.

17. Apparatus for controlling operation of a data storage device comprising:

a memory which stores computer-executable process steps; and

a processor which executes the process steps to control, through a user interface, one of a seek time of the data storage device and an acoustic noise level of the data storage device, so as to alter settings in the user interface for one of the seek time and the acoustic noise level of the data storage device in inverse relation, and to output commands to the data storage device causing the data storage device to alter seek trajectory shape.