SAE AS5393

1 Scope
  1.1 Classification
  1.2 Specification terminology
2 Applicable documents
  2.1 SAE publications
3 Definitions
4 Power/blade tracker interface
5 Indexing sensor/blade tracker interface
6 HUMS processor/blade tracker interface
  6.1 Send rotor track data
  6.2 Send rotor balance data
  6.3 Send average rotor track data
  6.4 Send average rotor balance data
  6.5 Send average rotor track data with statistics
  6.6 Send average rotor balance data with statistics
  6.7 Set auto lighting mode
  6.8 Force night mode
  6.9 Force day mode
  6.10 Clean lens
  6.11 Number of blades
  6.12 Number of revolutions to acquire
  6.13 Reference angle
  6.14 Rotor diameter
  6.15 Mean blade chord
  6.16 Rotor blade radius
  6.17 Tracker 'r' position
  6.18 Tracker 'o' position
  6.19 Tracker 'z' position
  6.20 Tracker pointing angle
  6.21 Number of harmonics
  6.22 Minimum rotor speed
  6.23 Maximum rotor speed
  6.24 Minimum coning angle
  6.25 Maximum coning angle
  6.26 Blade tracker errors
7 Accelerometer/blade tracker interface
8 Data types
  8.1 Floating point
  8.2 Integer
9 Notes
  9.1 Background

Specifies: a) rotor blade height, and b) lead-lag for use in a Rotor Track and Balance (RT&B) function in a Health and Usage Monitoring System (HUMS).

Blade trackers measure: (a) rotor blade height and (b) lead-lag for use in a Rotor Track and Balance (RT&B) function in a Health and Usage Monitoring System (HUMS). HUMS is a generic term for a system used to measure, monitor, process, and store information relating to the functioning and usage of an aircraft\'s on-board primary systems, including the engine(s).