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Space Shuttle Avionics: Difference between revisions
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(Note that since the Shuttle control surfaces are not driven by the stick but by a digital autopilot which takes the stick input as target, it is near impossible from the feedback to control inputs to gauge whether e.g. trim is off or not, so monitoring the display to ease the trim load of the elevons via body flap and/or speedbrake is important.) | (Note that since the Shuttle control surfaces are not driven by the stick but by a digital autopilot which takes the stick input as target, it is near impossible from the feedback to control inputs to gauge whether e.g. trim is off or not, so monitoring the display to ease the trim load of the elevons via body flap and/or speedbrake is important.) | ||
=== MEDS MAINT === | |||
[[File:Shuttle avionics meds maint.jpg|600px|MEDS MAINTENANCE display of the Space Shuttle]] | |||
The MEDS maintenance display shows the current status of the display setup. For each MDU, a box shows connected ports, flight-critical buses, port reconfiguration mode and self-test results. For each IDP and ADC (analog-digital converter) self-test results are available. | |||
Various submenus of the page allow to change ports, allow to change port re-configuration and are used to initiate self-tests (currently not implemented). | |||
Note that the page is always constructed from the point of view of the IDP in command of the screen and hence displays only information known to this IDP (i.e. MDUs which are not connected to the current IDP via either primary or secondary port can not be accessed). | |||
=== IDP FAULT SUMMARY === | |||
[[File:Shuttle avionics meds fault.jpg|600px|IDP FAULT SUMMARY display of the Space Shuttle]] | |||
The IDP fault summary (one exists for every IDP, the one shown is always of the IDP in control of the screen) is a sub-page of the MEDS maintenance page and shows a summary of all the fault messages of the MEDS system and allows to clear the list. | |||
Note that MEDS fault messages are a category different from DPS faults - this display will not show any faults in systems outside the display system itself, general faults are shown on DPS SPEC 99. | |||
== GNC DPS screens available == | == GNC DPS screens available == | ||