-
label 231 Total Air Temperature (BCD).
R 1EFF : 051-099, 106-149, 204-299, 301-399, 1 34-13-00Page 16 1401-499, 1Config-3 Aug 01/05 1 1 1CES 1
Temperature (TAT) Computation - Block Diagram
Figure 003
R 1EFF : 051-099, 106-149, 204-299, 301-399, 1 34-13-00Page 17 1401-499, 1Config-3 Aug 01/05 1 1 1CES 1R **ON A/C 051-099, 106-149, 204-299, 301-399,
(c) AOA computation (Ref. Fig. 004) The A/C is wired in the AOA unique selection, so the ADR computes the AOA with the reading of one resolver. The second resolver is used as a back-up. The monitoring function is described in 34.18 The ADR determines the corrected angle of attack value which depends on the system number and the slat/flap position. For a CAS less than 60 kts: AOAc = 0 and status matrix is coded NCD. For a CAS more than or equal to 60 kts, the corrected angle of attack is calculated as follows:
AOA ind AOAc = -------+ I
K where: AOA ind = Indicated Angle of Attack (Ref. 34-11-00 for
the relation between resolver and AOA indication)
K, I = Correction coefficients which depend on system number, slat and flap configuration and magnitude AOA indication.
The configuration is defined by the status of four input
discretes (Ref. 2.A.(2)(c)).
The results of the above computation is available on the labels:
-
label 221 = Indicated Angle of Attack
-
label 241 = Corrected Angle of Attack
1EFF : 051-099, 106-149, 204-299, 301-399, 1 34-13-00Page 18 1 1 Config-3 Aug 01/05 1 1 1CES 1
SFCC/AOA Alternate Discrete Signals
Figure 004
R 1EFF : 051-099, 106-149, 204-299, 301-399, 1 34-13-00Page 19 1401-499, 1Config-3 Aug 01/05 1 1 1CES 1
R **ON A/C 401-499,
R (c) AOA computation
R (Ref. Fig. 004)
R The A/C is wired in the AOA unique selection, so the ADR computes
R the AOA with the reading of one resolver. The second resolver is
R used as a back-up. The monitoring function is described in 34.18
R The ADR determines the corrected angle of attack value which
R depends on the system number and the slat/flap position.
R For a CAS less than 60 kts: AOAc is still computed , and status
R matrix is coded NCD.
R The corrected angle of attack is calculated as follows:
R AOA ind
R AOAc = -------+ I
R K
R where:
R AOA ind = Indicated Angle of Attack (Ref. 34-11-00 for
R the relation between resolver and AOA indication)
R K, I = Correction coefficients which depend on system
R number, slat and flap configuration and magnitude
R AOA indication.
R The configuration is defined by the status of four input
R discretes (Ref. 2.A.(2)(c)).
R The results of the above computation is available on the labels:
R - label 221 = Indicated Angle of Attack
R - label 241 = Corrected Angle of Attack
R 1EFF : 401-499, 1 34-13-00Page 20 1 1 Config-3 Aug 01/05 1 1 1CES 1R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
(4) Parameter computation
(a)
General The operational software of the ADR performs the following computations:
-pressure altitude and pressure altitude rate function (ALT)
-Mach function (M)
-airspeed function (CAS/TAS)
-temperature function (SAT/TAT)
-maximum operating speed function (VMO/MMO).
(b)
Altitude computation
The ADR software computes these different parameters: label 203 Pressure Altitude label 212 Altitude Rate label 204 Baro Corrected Altitude 1 (CAPT) label 220 Baro Corrected Altitude 2 (F/O) label 235 Baro Correction In Hg 1 (CAPT) label 237 Baro Correction In Hg 2 (F/O)
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