Title:
OPTIMIZATION METHOD OF TRACKING LOOP SIGNAL
Document Type and Number:
Japanese Patent JP3819114
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve tracking operation by avoiding instability of a servo system control loop.
SOLUTION: A tracking loop signal includes a different channel feedforward signal and a different channel feedback signal. A feedforward cosine term with respect to one channel is transmitted through a low pass filter in order to obtain its average value. A predetermined step is given to a feedforward sine term with respect to the other channel, and a response of the feedforward cosine is monitored. The feedforward cosine is integrated in order to evaluate what amount of 'cross talk' exists between the two channels. An obtained integral sum is used as a feedback element for adjusting sine and cosine terms to be inserted into the channels.
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Inventors:
Boris N Martins
Application Number:
JP15081097A
Publication Date:
September 06, 2006
Filing Date:
June 09, 1997
Export Citation:
Assignee:
HEWLETT-PACKARD COMPANY
International Classes:
G11B21/10; G11B5/596; (IPC1-7): G11B21/10
Domestic Patent References:
| JP4044677A | ||||
| JP62018683A | ||||
| JP10503868A |
Attorney, Agent or Firm:
Next student Okada
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