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Light rail vehicle having predictive diagnostic system for motor driven automated doors

  • US 6,636,814 B1
  • Filed: 08/22/2002
  • Issued: 10/21/2003
  • Est. Priority Date: 11/05/1999
  • Status: Expired due to Fees
First Claim
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1. A method for identifying when maintenance is required on a light rail vehicle motor driven automated door system, comprising the steps of:

  • a) collecting data from the door system;

    b) calculating current energy and time consumption values for the door system based on the data;

    c) producing a set of energy and time consumption values based on the current energy and time consumption values and historical energy and time consumption values;

    d) generating a degree of degradation of the system based on the set of energy and time consumption values;

    e) generating an estimated time to failure of the system based on the degree of degradation and a known point where the system requires maintenance; and

    e) identifying maintenance needs based on the estimated time to failure.

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