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Compression of servo control logging entries

  • US 7,676,282 B2
  • Filed: 12/02/2005
  • Issued: 03/09/2010
  • Est. Priority Date: 12/02/2005
  • Status: Expired due to Fees
First Claim
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1. A method for logging motion-related data obtained from a system, comprising:

  • providing a memory space;

    obtaining an initial complete value of a motion-related parameter of an initial physical state of a system;

    saving the initial complete value as an initial absolute value in a first field of a first absolute log entry in the memory space, the first field having a first length;

    periodically obtaining a first group of additional complete values of the parameter with the system in a then current state;

    determining the difference between each additional complete value and the preceding complete value; and

    saving each difference as a relative value in a first field of a respective relative log entry in the memory space, the first field of the relative log entry having a second length shorter than the first length.

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