1

EFCS I/O

2

DMSEFCS ControlSubsystem

ISA1 Input DataISA2 Input DataISA3 Input DataST1 Input DataST2 Input DataCommand Data

Telemetry DataPPM CommandsST Commands

3

Inertial Sensor Assembly (ISA) Inputs

• Calculated automatically in simulation• Defined in gnc_1553_system_objects.ads• 3 Sensors; 2 records per sensor• Note that the output of the ISA is an input to EFCS

• ISA1_OUTPUT_DATA_M01 : ISA_OUTPUT_DATA_M01_TYPE;• ISA1_OUTPUT_DATA_M02 : ISA_OUTPUT_DATA_M02_TYPE;

• ISA2_OUTPUT_DATA_M01 : ISA_.OUTPUT_DATA_M01_TYPE;• ISA2_OUTPUT_DATA_M02 : ISA_OUTPUT_DATA_M02_TYPE;

• ISA3_OUTPUT_DATA_M01 : ISA_OUTPUT_DATA_M01_TYPE;• ISA3_OUTPUT_DATA_M02 : ISA_OUTPUT_DATA_M02_TYPE;

4

Star Tracker Inputs

• Calculated automatically in simulation

• Defined in gnc_1553_system_objects.ads

• 2 Sensors

• Note that the output of the Star Tracker is an input to EFCS

• ST1_OUTPUT_DATA : ST_OUTPUT_DATA_T;

• ST2_OUTPUT_DATA : ST_OUTPUT_DATA_T;

5

Command Data

• Defined in gnc_ul_system_objects.ads

– Mode commands

– Attitude commands

• Provided to Control subsystem using Scripting language (Timeliner) in version given to you

• Can be changed using Timeliner script, or using software

– Look at mit-16-035_script.tls for script being used

• env_uplink.ads defines numeric codes for command data (see “defines” at the beginning of the script)

– Run tl_main.exe to compile a script

• It will prompt for input script (*.tls)

• No options are needed

• It will produce *.tlx as output (same name as input)

• Rename to cc_script.tlx for EFCS software to use it

6

Telemetry Data

• Should contain all data needed by Test Team

• Currently defined as follows

– gnc_hfe_system_objects.ads• ATTITUDE_IB : ATTITUDE_IB_T;

• ATTITUDE_RATE : ATTITUDE_RATE_T;

– gnc_mfe_system_objects.ads• SSF_USER_STATE : SSF_USER_STATE_T;

• ACF_COMMAND : ACF_COMMAND_T;

– gnc_cs_system_objects.ads

• GNC_CS_OUTPUT : GNC_CS_OUTPUT_T;

7

PPM Commands

• Used automatically by simulation

• Output from student-generated code

• Defined in:– gnc_1553_system_objects.ads

• PPM1_COMMAND_DATA : PPM_COMMAND_DATA_T;

• PPM2_COMMAND_DATA : PPM_COMMAND_DATA_T;

8

Star Tracker Commands

• Used automatically by simulation

• Defined in gnc_1553_system_objects.ads

• 2 Sensors; 2 records per sensor

• Note that the output of the Star Tracker is an input to EFCS

• ST1_COMMAND_DATA : ST_COMMAND_DATA_T;

• ST2_COMMAND_DATA : ST_COMMAND_DATA_T;