RESE-1 Electrical System Design Review
Hans-Peter Dumm 6 September 2006 Overview
Background
Components
Configuration Items
Standards Used in Design
Electrical System Progress Report Electrical System Background Purpose Create a system that will: support all onboard experiments capture the experimental data transmit the data to the ground provide for vehicle: attitude knowledge health monitoring Scope Define the electrical interfaces for all experiment related components Determine and purchase the telemetry equipment needed for each experiment Design and build the wiring harnesses that connect the components Assemble all components into RESE-1 Test the assembled components in a simulated flight environment Experiment Components Components by Section Affordable Recovery System (ARS) Nose tip recession sensor Heat flux gauge Constant current power source and signal conditioning board 2 Thermocouples Ocellus sensor Reentry Cone (RV) 6 Thermocouples RSBD Treated as one component Halffoam 5 Microphones 2 Thermocouples Boattail Q-Flex Experiment Box Other Components Components by Section Affordable Recovery System (ARS) Beacon and beacon antenna Reentry Cone (RV) All telemetry equipment batteries and power supply boards data acquisition components antennas transmitters Nose tip separation pyrotechnic device RV separation pyrotechnic devices Fiber-optic data connection Magnetometer for orientation Accelerometer for flight vibration loads and trajectory reconstruction Ammeters and voltmeters RSBD Umbilical connection
1 2 3 4 5
Standards Used in Design
Wiring/Harnessing FAA Advisory Circular 43.13-1B NASA-STD-8739.4 Crimping, Interconnecting Cables, Harnesses, and Wiring Grounding/Shielding NASA-HDBK-4001 Electrical Grounding Architecture for Unmanned Spacecraft NASA-STD-P023 Electrical bonding for NASA launch vehicles, spacecraft, payloads, and flight equipment MIL-HDBK-1857 Grounding, bonding and shielding design practices ECSS-E-50-12A Spacewire Pyrotechnics MIL-STD-1576 Electroexplosive Subsystem Safety Requirements and Test Methods for Space Systems Progress Report
Work Completed All electrical interfaces are defined except for the following components Beacon and beacon antenna Avionics deck PSL Magnetometer Accelerometer C-band transponder Antennas All telemetry components have been selected and purchased except for the following items S-band antennas C-band antennas C-band transponder Magnetometer and accelerometer Harnessing for avionics deck Fiber-optic and umbilical connectors Electrical Schematics and Wiring harnesses have been drawn Need revision All wire, cable, and connectors have been ordered Progress Report
Work To be Completed by Next Design Review Interfaces Define beacon and beacon antenna interfaces Define avionics deck interface PSL accelerometer, magnetometer, antenna, transmitters Purchasing of Remaining Telemetry Components Depends on contract with launch provider Wiring Harnesses Design Update all harness drawings with twisted pair shield grounding Complete pyrotechnic drawings Update all harness drawings and related schematics to reflect RSBD and NASA interface changes Build After next design review Other Need to verify that thermocouple signals are correct after passing through connectors by testing Progress Report
Appraisal
The RESE-1 electrical system and its components have been defined
We are very near to finalizing drawings and interfaces All harness materials and most of the avionics/telemetry hardware have been purchased
Building of the harnesses will commence after the next design review need to get PSL on contract to purchase all remaining components and services