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UNCERTAINTY CONTRIBUTION IN THE CASE OF COSINE FUNCTION WITH ZERO ESTIMATE – A PROPOSAL

Dirk Röske
  • Abstract:
    The model function of the torque generated in a static torque standard machine contains a cosine function for the inclination of the lever against the horizontal plane. An inclined lever has a shorter effective lever arm length, and a smaller torque is generated in this case. The uncertainty analysis of this model function gives a zero sensitivity coefficient for the inclination angle when the estimate of the angle is zero – a mathematical correct, but from the uncertainty point of view, obviously improper result. A method for dealing with this problem is proposed in this paper.
  • Keywords:
    uncertainty, cosine function, zero estimate
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  • DOI:
    _unreg_tc3-2010.028

Event details:

  • IMEKO TC:
    TC3
  • Event name:
    TC3 Conference 2010
  • Title:

    21st Conference on Measurement of Force, Mass and Torque (together with TC5 HARDMEKO 2010 and 2nd TC22 Meeting on Vibration Measurement)

  • Place:
    Pattaya, THAILAND
  • Time:
    21 November 2010 - 25 November 2010