APPENDIX AVI212 Especificações descarregar pdf (Página 44)

Gaia

GAIA.ASU.SP.ESM.00007

Issue 2.00

Page 44 of 79

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GAIA.ASU.SP.ESM.00007 (Avionics SCOE Req Iss 2).doc

3.6.7.2 FSS HWIL Test

When an FSS is HWIL, Test Voltages (T1 - T4) can be applied to the FSS. Selection of the Test Voltages is

made by setting HIGH the A2 address line (from the EIU) to the FSS (see AVI-756).

To prevent the need to adapt the EIU, or the CDMU Central Software, it is required to interrupt Address Line

A0 between the EIU and the FSS and set the Line HIGH towards the FSS.

During FSS HWIL testing, an Astrium Ltd provided test adapter is used at the FSS test (skin) connector to

achieve this.

As the FSS does not provide a Sun Presence Signal relative to the Test Voltage inputs, it is also necessary

to simulate this signal when FSS is HWIL.

AVI-4145/CREATED/T

For testing when FSS is HWIL, the Avionics SCOE shall provide the following interfaces:

4 x Test Voltage Stimulus outputs (T1 - T4) to the FSS

1 x 'Sun Presence' Voltage Simulation output (being the sum of T1 - T4) to the EIU (this being the same

signal used for FSS Simulation - Section 3.6.7.1)

AVI-4153/CREATED/T

Test Voltage Stimulus outputs (T1 - T4) and 'Sun Presence' Voltage Simulation outputs shall conform

to the following specification: [AD06] Table 3.5-10 (Analog Driver Specification 2).

AVI-4208/CREATED/T

In open-loop test mode, the values of T1 - T4 shall be set by the local MMI or CCS (Test

Procedure/Command Line).

AVI-4209/CREATED/T

In open-loop test mode, the value of the 'Sun Presence' signal shall be calculated by the Avionics

SCOE as the sum of the T1 - T4 voltages.

AVI-4210/CREATED/T

In closed-loop test mode, the values of T1 - T4 and the 'Sun Presence' signal shall be determined by

the RTS (FSS Models).

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