Inverted heading calibration

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Move a position reference frame to the work deck. Presentation by Nicolàs de Hilster (Starmountain Survey and Consultancy) en Erich Gaickhorst (GeoVisie).

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Inverted heading calibration

  1. 1. N. de Hilster E. Gaikhorst HSB Workshop Vessel Geometry and Calibrations 15 January 2014 The Inverted Heading Calibration: a field case 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 1/18
  2. 2. Project Outline Create a copy of the reference marble on the aft weather deck. Required heading accuracy: 3' (0.05°) While being afloat! 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 2/18
  3. 3. Traverse? 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 3/18
  4. 4. Or direct? 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 4/18
  5. 5. Project Solution No direct line of sight Traversing not possible Solution: the inverted heading calibration 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 5/18
  6. 6. Implementation dFOG (Geovisie) autocollimation set (Starmountain) 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 6/18
  7. 7. Autocollimation Set Tilting base for T2 Groove for FOG pins Alignment accuracy: 0.002° 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 7/18
  8. 8. Autocollimation Set 2D prism target Alignment accuracy: 0.002° 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 8/18
  9. 9. Autocollimation Rotating bases for FOG and T2 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 9/18
  10. 10. Procedure dFOG for initial pitch and roll B 15 January 2014 A N. de Hilster, The Inverted Heading Calibration: a field case 10/18
  11. 11. Procedure Physical heading alignment 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 11/18
  12. 12. Procedure dFOG for final pitch and roll B 15 January 2014 A N. de Hilster, The Inverted Heading Calibration: a field case 12/18
  13. 13. Procedure dFOG on the weather deck 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 13/18
  14. 14. Procedure Create Master Training Datum Markers 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 14/18
  15. 15. Procedure Repeated on the other side 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 15/18
  16. 16. Result 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 16/18
  17. 17. Quality Control Post Alignment Check with dFOG Independent survey of all six markers Calculation of parallelism (target: 3') Vessel dHeading dRoll 1 2.5' (0.72mm/m) 1.0' (0.29mm/m) 2 0.1' (0.02mm/m) 1.5' (0.44mm/m) 3 0.9' (0.25mm/m) 2.1' (0.61mm/m) Average 1.1' (0.33mm/m) 1.5' (0.45mm/m) 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 17/18
  18. 18. Conclusion Accurate gyro's (FOGs) can be used to transfer heading on dynamic objects Sensors of the highest accuracy are required Achievable accuracy approximately a third of the FOG specification 15 January 2014 N. de Hilster, The Inverted Heading Calibration: a field case 18/18

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