STARLight PDR 3 Oct ‘01I.1 Miller STARLight Control Module Design Ryan Miller STARLight Electrical Engineer (734)

STARLight PDR 3 Oct ‘01I.2 Miller STARLight Overview Control Module Requirements Digital Signal Processing Data Formatting and Rates Hardware Overview Power Summary Software Overview Schedule

STARLight PDR 3 Oct ‘01I.3 Miller STARLight Control Module Requirements Provide overall control for the STARLight instrument Allow modification of system parameters – ADC Gain/Offset – Sample Clock Delay – Integration Period Provide signal processing of sensor data – Inphase and Quadrature correlations for all 10 channels – Autocorrelations for all 10 channels Format and store processed data in non-volatile storage Format and store housekeeping data with sensor data Provide GSE interface for data download and real-time display and control

STARLight PDR 3 Oct ‘01I.4 Miller STARLight System Block Diagram

STARLight PDR 3 Oct ‘01I.5 Miller STARLight Correlation Auto-correlations for each channel (10) Cross-correlations for every pair (IxI,IxQ,QxI,QxQ) – 10 pairs of I and Q signals (20 signals) – 190 correlations Selectable integration period (1 to 2 seconds, nominal) Correlator Output (one second integration) – 200 channels/second * 30 bits per channel = 6000 bits/sec

STARLight PDR 3 Oct ‘01I.6 Miller STARLight Data Storage Requirements Total Data Rate = 11,000 bits/sec – Sensor: 6000 bps – Housekeeping: 3000 bps – Other:2000 bps Mission Time is approximately 3 hours Total on-board storage needed: – bits/sec * 3 hours * 3600 sec/hour = 15 Megabytes

STARLight PDR 3 Oct ‘01I.7 Miller STARLight Control Module Electronics Block Diagram

STARLight PDR 3 Oct ‘01I.8 Miller STARLight Correlator Block Diagram

STARLight PDR 3 Oct ‘01I.9 Miller STARLight Control Module Hardware PC/104 based system Control Computer – Commercial PC/104 Pentium Single Board Computer I/O – Commercial PC/104 Data Acquisition Board – IR Profiler thermocouple interface – Power supply voltage monitoring Correlator – Custom PC/104 style board with interface to the Control Computer – Custom interfaces to the Sensor Module – Pilot interface electronics Power Conditioning and Supplies – Converts aircraft power to required system voltages

STARLight PDR 3 Oct ‘01I.10 Miller STARLight PC-104 Mechanical Info

STARLight PDR 3 Oct ‘01I.11 Miller STARLight PC-104 Mechanical Info (cont.)

STARLight PDR 3 Oct ‘01I.12 Miller STARLight EBC-TXPlus Single Board Computer 8.0” 5.75” Intel Pentium 166MMX, AMD-K6 32 to 256MB of system SDRAM supported in 168-pin DIMM Socket for up to 288MB bootable DiskOnChip PC-compatible; uses Intel 430TX chip set Ethernet controller using Intel 82559ER 4 RS232 serial ports with FIFO, COM1 & COM2 with optional RS-422/485/J1708 support 48 bi-directional TTL digital I/O lines with 24 capable of event sense interrupt generation PC/104 and PC/104-Plus expansion connectors Three 16-bit counter timers Extended Operating Temperature Available for 166 MHz board from -40 o C to +85 o C +5 volt only operation Real Time Clock, WDT and power fail reset

STARLight PDR 3 Oct ‘01I.13 Miller STARLight PCM-518 Sensor Interface Module 3.6” 3.8” Supports thermocouples, RTD’s, strain gauges, voltage inputs, 4-20 mA current loops, and thermistors 8 Channels of 16-bit A/D resolution Each channel software programmable for sensor type and gain Onboard processor unburdens PC/104 system CPU by performing control, linearization, and conversion to engineering units. True four-wire circuits for resistive sensors Pulsed excitation source reduces self-heating in resistive sensors Totally electronic calibration - no trimpots to adjust Optional ADP-7409TC field termination board Screw terminals for easy wiring Supplied with 8 removable terminal blocks Integral cold junction temperature sensor for thermocouples

STARLight PDR 3 Oct ‘01I.14 Miller STARLight Power Summary

STARLight PDR 3 Oct ‘01I.15 Miller STARLight Software Overview Developed using QNX – Real-time Operating System – Provides real-time operation, interrupt handling, TCP/IP networking Provides overall system control – Sensor parameter setting – Data collection – Data formatting and storage Provides thermal system control – PID Loops using sensor temperature measurements, 10 channels Provides GSE interface – 100 BaseT TCP/IP – Realtime data transmission – Stored data collection – Interactive control

STARLight PDR 3 Oct ‘01I.16 Miller STARLight Software Structure

STARLight PDR 3 Oct ‘01I.17 Miller STARLight Schedule