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Space Shuttle Avionics: Difference between revisions
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=== PL BAY DOORS (OPS 202) === | === PL BAY DOORS (OPS 202) === | ||
[[File: | [[File:Ops_202_sm_final.jpg|1200px|PL BAY display of the Space Shuttle]] | ||
The payload bay door management display is an operational sequence of the systems management functionality used in orbit. It allows detailed software control over opening and closing the payload bay door latches and doors and monitors the state of the individual microswitches leading to 'open' and 'closed' talkbacks. | The payload bay door management display is an operational sequence of the systems management functionality used in orbit. It allows detailed software control over opening and closing the payload bay door latches and doors and monitors the state of the individual microswitches leading to 'open' and 'closed' talkbacks. | ||
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=== ENVIRONMENT (DISP 66) === | === ENVIRONMENT (DISP 66) === | ||
[[File: | [[File:Spec_66_env_final.jpg|1200px|ENVIRONMENT display of the Space Shuttle]] | ||
The crew monitors the cabin environment - atmosphere, water, temperatures - on DISP 66. The various sections show (clockwise from upper left): 1) Cabin atmosphere with pressure, partial pressure of O2, fan action and pressure change. 2) Avionics bay fans and temperature readings 3) supply water quantities, tank pressures and exhaust line and vent temperatures 4) waste water quantity, pressure and vent temperature, 5) regenerable CO2 removal system status (this is not installed on 'Atlantis') 6) IMU fan and humidity separator status and 7) oxygen and nitrogen system pressures, flows and valve status. | The crew monitors the cabin environment - atmosphere, water, temperatures - on DISP 66. The various sections show (clockwise from upper left): 1) Cabin atmosphere with pressure, partial pressure of O2, fan action and pressure change. 2) Avionics bay fans and temperature readings 3) supply water quantities, tank pressures and exhaust line and vent temperatures 4) waste water quantity, pressure and vent temperature, 5) regenerable CO2 removal system status (this is not installed on 'Atlantis') 6) IMU fan and humidity separator status and 7) oxygen and nitrogen system pressures, flows and valve status. | ||
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=== ELECTRIC (DISP 67) === | === ELECTRIC (DISP 67) === | ||
[[File: | [[File:Spec_67_electric_final.jpg|1200px|ELECTRIC display of the Space Shuttle]] | ||
On this display, information on the power consumption and distribution throughout the Shuttle can be found. It shows the voltages measured at the main DC and AC buses as well as the current flowing through the systems and the total consumption of all systems aboard the orbiter. | On this display, information on the power consumption and distribution throughout the Shuttle can be found. It shows the voltages measured at the main DC and AC buses as well as the current flowing through the systems and the total consumption of all systems aboard the orbiter. | ||
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=== CRYO SYSTEM (DISP 68) === | === CRYO SYSTEM (DISP 68) === | ||
[[File: | [[File:Spec_68_final.jpg|1200px|CRYO SYSTEMS display of the Space Shuttle]] | ||
Cryogenic stores of hydrogen and oxygen are carried aboard the Shuttle both to provide reactants for the fuel cells and to provide water for the environment system. The state of the cryogenic tanks (temperature, pressure and quantity) can be monitored via the cryo system display. | Cryogenic stores of hydrogen and oxygen are carried aboard the Shuttle both to provide reactants for the fuel cells and to provide water for the environment system. The state of the cryogenic tanks (temperature, pressure and quantity) can be monitored via the cryo system display. | ||
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=== FUEL CELLS (DISP 69) === | === FUEL CELLS (DISP 69) === | ||
[[File: | [[File:Spec_69_FC_final.jpg|1200px|FUEL CELLS display of the Space Shuttle]] | ||
The fuel cells display shows data on the electrical power generation aboard the Shuttle. It allows to monitor power output of the fuel cells, reactant consumption, stack temperatures and the function of the cooling pumps as well as temperatures of relief lines and purge lines and contains a detailed substack diagnostics monitoring system. | The fuel cells display shows data on the electrical power generation aboard the Shuttle. It allows to monitor power output of the fuel cells, reactant consumption, stack temperatures and the function of the cooling pumps as well as temperatures of relief lines and purge lines and contains a detailed substack diagnostics monitoring system. | ||
Almost all entries except the pH monitors are meaningful in FG and accurately reflect various possible failure modes. | Almost all entries except the pH monitors are meaningful in FG and accurately reflect various possible failure modes. | ||
=== COMMUNICATIONS (SPEC 76) === | |||
[[File:SPec_76_comm_final.jpg|1200px|SPEC 76 Communications display of the Space Shuttle]] | |||
A display that shows the status of the different means of communication in the Shuttle ( Ku/S Band, UHF, ...). | |||
Some failures are implemented, like low temperatures if no heaters powered and lack of datas if communication not established with a realy station for example. | |||
=== SYS SUMM 1 (DISP 78) === | === SYS SUMM 1 (DISP 78) === | ||
[[File: | [[File:Sm_sys_sum_up_1_final.jpg|1200px|SM SYS SUMM 1 display of the Space Shuttle]] | ||
The first SM systems summary contains an overview of the electric power generation and distribution as well as the readouts of the cabin environment system and smoke detection. | The first SM systems summary contains an overview of the electric power generation and distribution as well as the readouts of the cabin environment system and smoke detection. | ||
As of | As of December 2020, all the parameters are implemented and showing subsystems real state (even the smoke in the cabin). | ||
=== SYS SUMM 2 (DISP 79) === | === SYS SUMM 2 (DISP 79) === | ||
[[File: | [[File:Sm_sys_sum_up_2_final.jpg|1200px|SM SYS SUMM 2 display of the Space Shuttle]] | ||
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=== APU/HYD (DISP 86) === | === APU/HYD (DISP 86) === | ||
[[File: | [[File:Spec_86_hyd_apu_final.jpg|1200px|APU/HYD display of the Space Shuttle]] | ||
On this display, a summary of various pressure and temperature readings of the APU and hydraulics systems can be accessed. All parameters are meaningful and represent the internal state of the simulation and possible failure modes. | On this display, a summary of various pressure and temperature readings of the APU and hydraulics systems can be accessed. All parameters are meaningful and represent the internal state of the simulation and possible failure modes. | ||
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=== HYD THERMAL (DISP 87) === | === HYD THERMAL (DISP 87) === | ||
[[File: | [[File:Spec_87_hyd_thermal.jpg|800px|HYD THERMAL display of the Space Shuttle avionics]] | ||
The hydraulic thermal properties display is used to monitor the status of the hydraulic system in orbit. It shows the basic pressures of the accumulators and the circulation pumps, as well as line temperatures for the various systems driven by the hydraulics. This allows to monitor the proper functioning of the circulation pumps to keep the lines from freezing in cold spots. In addition, the lower left part shows tire pressures for the gear. | The hydraulic thermal properties display is used to monitor the status of the hydraulic system in orbit. It shows the basic pressures of the accumulators and the circulation pumps, as well as line temperatures for the various systems driven by the hydraulics. This allows to monitor the proper functioning of the circulation pumps to keep the lines from freezing in cold spots. In addition, the lower left part shows tire pressures for the gear. | ||
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=== PRPLT THERMAL (DISP 89) === | === PRPLT THERMAL (DISP 89) === | ||
[[File: | [[File:Spec_89_prplt_thermal_final.jpg|1200px|PRPLT THERM display of the Space Shuttle avionics]] | ||
The thermal properties of the propellant feedlines for RCS and OMS thrusters can be monitored on DISP 89. It shows various temperature sensor readings distributed across the aft OMS pods and the forward RCS system. The heating elements are supposed to maintain temperatures between 55 and 75 F in the feedlines, temperature readings outside this range indicate a problem and potentially a frozen feedline. The fuel injector temperature is special in that it measures the temperature of the fuel after it has been circulated through the engine nozzle for cooling, hence it reflects the efficiency of OMS engine cooling. During engine operations, it increases and should be around 220 F. | The thermal properties of the propellant feedlines for RCS and OMS thrusters can be monitored on DISP 89. It shows various temperature sensor readings distributed across the aft OMS pods and the forward RCS system. The heating elements are supposed to maintain temperatures between 55 and 75 F in the feedlines, temperature readings outside this range indicate a problem and potentially a frozen feedline. The fuel injector temperature is special in that it measures the temperature of the fuel after it has been circulated through the engine nozzle for cooling, hence it reflects the efficiency of OMS engine cooling. During engine operations, it increases and should be around 220 F. | ||
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=== PDRS CONTROL (SPEC 94) === | === PDRS CONTROL (SPEC 94) === | ||
[[File: | [[File:Spec_94_pdrs_control_final.jpg|1200px|PDRS control display of the Space Shuttle]] | ||
Using the PDRS (payload deployment and retrieval system) control utility page, various readings of the RMS arm state can be monitored as well as automatic modes configured. | Using the PDRS (payload deployment and retrieval system) control utility page, various readings of the RMS arm state can be monitored as well as automatic modes configured. | ||
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=== PDRS OVERRIDE (SPEC 95) === | === PDRS OVERRIDE (SPEC 95) === | ||
[[File: | [[File:Spec_95_pdrs_override_final.jpg|1200px|PDRS OVERRIDE display of the Space Shuttle]] | ||
The PDRS override special function page provides the ability to operate the RMS arm via software commands in case the hardware of one or more control switches fails. By selecting the override and then the corresponding item, all hardware inputs to the controller are ignored and replaced by software settings. | The PDRS override special function page provides the ability to operate the RMS arm via software commands in case the hardware of one or more control switches fails. By selecting the override and then the corresponding item, all hardware inputs to the controller are ignored and replaced by software settings. | ||
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=== PL RETENTION (DISP 97) === | === PL RETENTION (DISP 97) === | ||
[[File: | [[File:Spec_97_pl_retention.jpg|1200px|PL RET display (DISP 97) of the Space Shuttle]] | ||
The payload retention display is used to monitor the status of the payload retention system latch microswitches. It indicates the current latch status as well as whether a payload is in the correct position to be latched. | The payload retention display is used to monitor the status of the payload retention system latch microswitches. It indicates the current latch status as well as whether a payload is in the correct position to be latched. | ||
Currently only the payload position 1 is functional, the others are not yet implemented in FG. | Currently only the payload position 1 is functional, the others are not yet implemented in FG. | ||
=== PDRS STATUS (DISP 169) === | |||
[[File:Spec_169_pdrs_status_final.jpg|1200px|PDRS STATUS display (DISP 169) of the Space Shuttle]] | |||
The PDRS STATUS display is an SM display available in SM OPS 2 which provides data on point of resolution commanded and actual rates, position and attitudes of the different elements of the RMS arm. | |||
It is a software duplication of the hardware RMS panel at the back of the Space Shuttle cockpit. | |||
=== THERMAL (OPS 0001) === | |||
[[File:Bfs_thermal_0_final.jpg|1200px|THERMAL BFS display (OPS 0001 SM) of the Space Shuttle]] | |||
The THERMAL display is a BFS display only which provides the crew data on the hydraulic system, heater status, Freon/water loop parameters, tire pressure status, and brake pressure readings. | |||
It is particularly useful to follow in OPS 1 and 3 the Freon loop temperature and the OMS pods thermal state ( for OMS 2 burn ) | |||