T-45C TS, ADV & IUT ENG-24
GINA Operating Characteristics
c.
For communication with other circuitry
d.
Performs BIT processing
e.
Programmed in ADA software language
3.
Kalman filter
a.
32 state (path) computation logic filter
b.
Contains sophisticated algorithms that
determine exact weight to apply to various like-
type inputs in order to arrive at most accurate
and consistent GINA “solutions”
INSTRUCTOR NOTES
Kalman filtering techniques are employed to most accurately
integrate GPS up-dates of INS accelerometer measurements.
This type of “filtering” employs a sophisticated set of
mathematical weights assigned to numerous data processed
within the GINA. Particular forms of data are assigned more/
less weight at different times as conditions vary. By example,
GPS position is generally weighted very heavily because it is
usually highly accurate; however, as GPS satellite lock-on
decreases to less than four (4) satellites, the Kalman weighting
of GPS position, likewise, decreases. Over many years,
LITTON has continually refined their Kalman formulas. The
company has in the past (and continues today) to accrue a
great deal of empirical data and uses it to improve the GINA
Kalman algorithms.
PROGRESS CHECK
Question 6 -- 1.7.7.6.1
To what other aircraft systems does the GINA Link using
the 1553 data bus?
ANSWER: The DEU and ADR
Original (9-98)
Page 24-28
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