-
the test software,
-
the monitoring and test software.
The functional software (braking control, anti-skid, ARINC 429
management...) and the test software are integrated in the
control channel.
The monitoring software is integrated in the monitoring channel.
The operational software is divided into modules as per the IDEFO
method (ICAM Definition Method). The corresponding diagrams are
given in the figures below:
(Ref. Fig. 041, 042, 043, 044A, 045A, 046, 047, 048, 049)
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
4. Operation/Control and Indicating
________________________________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. Control
(1) General (Ref. Fig. 051, 052, 053, 054, 055) The various inputs and outputs associated with the control are shown in the schematic. Functions performed:
-Control of the brake selector valve,
-Automatic braking of the wheels upon initiation of the landing gear retraction,
-Auto brake.
1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page 99 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1
Normal Braking - Electrical Control Schematic
Figure 051
1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page A0 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1
Braking Control (Principle)
Figure 052
1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page A1 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1
Braking Electrical Control - Schematic Part 1
Figure 053
1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page A2 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1
Braking Electrical Control - Schematic Part 2
Figure 054
1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page A3 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1 1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page A4 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1
(2) Selector valve control The opening of the selector valve results from the actions given below:
-depression of a left or right pedal past the load threshold (approx 14%).
-activation of the auto brake,
-automatic braking of the wheel during the landing gear retraction.
- opening order sent by the functional test at landing gear extension.
(3) Pressure slaving of the Normal servovalve For each gear, the brake command obtained by the depression of a pedal is transformed into a pressure by the normal servovalve. The servovalve is internally servoed to prevent pressure shifts ; a feedback loop which uses a pressure transducer adjusts the controlled pressure. The maximum pressure supplied by the servovalve is 175 bars.
**ON A/C 106-149, 221-299,
A. Control
(1)
General (Ref. Fig. 051, 052, 053, 054, 055) The various inputs and outputs associated with the control are shown in the schematic. Functions performed:
-Control of the brake selector valve,
-Automatic braking of the wheels upon initiation of the landing gear retraction,
-Auto brake.
(2)
Selector valve control The opening of the selector valve results from the actions given below:
-depression of a left or right pedal past the load threshold (approx 14%).
-activation of the auto brake,
-automatic braking of the wheel during the landing gear retraction.
- opening order sent by the functional test at landing gear extension.
1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-42-00Page A5 1201-299, 301-399, 1Config-1 Aug 01/05 1 1 1CES 1
(3) Pressure slaving of the Normal servovalve For each gear, the brake command obtained by the depression of a pedal is transformed into a pressure by the normal servovalve. The servovalve delivers the commanded pressure to the brakes. The BSCU uses a feedback loop with a pressure transducer to adjust the commanded pressure and prevent pressure shifts. (Ref. Fig. 052) The maximum pressure supplied by the servovalve is 175 bars.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
(4) Digital outputs This table contains all the output parameters in the digital form. They are sorted per the numerical order of their output label. The following table gives:
-EQ. SYS. LABEL. SDI: (SDAC,FWC,DMC,...) Output label for which the parameter is available.
-PARAMETER DEFINITION: Parameter name.
-WORD RANGE/OPER RANGE/RESOLUTION ACCURACY: Measurement range. Maximum value transmitted. When the digital value changes, the change step is equal to the accuracy.
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