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Data compression method for telemetry of vibration data

  • US 4,908,785 A
  • Filed: 08/16/1985
  • Issued: 03/13/1990
  • Est. Priority Date: 08/16/1985
  • Status: Expired due to Fees
First Claim
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1. A method for compressing vibration data for telemetry from a missile or spacecraft while allowing complete assessment of important vibration modes, comprising the steps of:

  • (a) sensing the missile vibration at a predetermined sample rate with at least one strain gauge to generate raw vibration data;

    (b) splitting the signal into a first and a second signal path, the paths being electrically connected in parallel;

    (c) filtering the raw vibration data in the first signal path to obtain an uncompressed low frequency component suitable for transmission;

    (d) frequency analyzing the data in the second signal path into compressed frequency/amplitude data suitable to identify sources of high frequency vibrations; and

    (e) multiplexing the compressed frequency/ amplitude data with the low frequency component without further signal processing of either component to provide a mixed signal, the mixed signal being compressed from the raw signal and being suitable for efficient transmission.

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