Space Plug-and-Play Avionics - Urweb · 2016. 1. 27. · Introduction • DoD’s Operationally Responsive Space (ORS) – Dramatic reduction in timescale for fielding an operationally
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Space Plug-and-Play Avionics
Denise Lanza, SAICJim Lyke, AFRL/VS
Don Fronterhouse, SSIScott Cannon, USU
Wheaton (Tony) Byers, SAIC
Introduction
• DoD’s Operationally Responsive Space (ORS) – Dramatic reduction in timescale for fielding an operationally
useful capability – New paradigms in designing, building, integrating, launching,
and bringing online tactical space systems• To achieve ORS, a number of technology and culture barriers
must be addressed– Low-cost launch capability (e.g. DARPA Falcon program)– Avionics and software have significant hope for improvement
utilizing “plug-and-play” (PnP) technology• AFRL Responsive Space Advanced Technology Study (RSATS)
identified PnP technologies, especially in avionics, as providing enabling benefit to the cause of ORS
• AFRL is spearheading an effort to develop a SPA standard under the auspices of the AIAA
Traditional Satellite Avionics
C & DHProcessor
Interface Card
Interface Card
Interface Card
Interface Card
Bac
kpla
ne (e
.g. P
CI B
us)
Non-programmableTransceiver
(comm)
GNC
GNC
GNC
PowerDistribution
temp telemetry
Payload (s)
Interface Card
temptemp
temp
Custominterface
Custominterface
Cust.int.
Cust.int.
Cus
t.int
.
The non-modular part
Plug and Play AvionicsHigh Performance Computing
AdaptiveWiring
Manifold
MSP
SpaceWire
SpaceWire
SpaceWire
SpaceWire
SpaceWire
Optical SensorHDR
Sensor
Software Radio
Software Radio
µSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensorµSensorµSensor
µSensorµSensor
µSensorµSensor
µSensorµSensor
MSP
MSP
MSP
MSP
Space-Wire
FP
FP
FP
FP
FPFPFP
FP
FP
FP
FPFP
Plug-and-play network
FP
FP
FP
FP
FPFPFP
FP
FP
FP
FPFP
FP
FP
FP
FP
FPFPFP
FP
FP
FP
FPFP
Key Tenets of SPA
• Machine-negotiated interfaces– Use of commercial standards for physical layer interface
– Self-describing component-objects (xTEDS & CDD)
– Managing the component-object collection using Satellite Data Model (middleware)• Distributed implementation to break need for centralization
• Addition of power delivery and synchronization
• Applications are written to be PnP aware based on services independent of components– Often more than one source of a desired quantity
– Component availability based upon need
A Phased Approach To SPA Development
Spacecraft Interface Standards
GENERATION 1
Spacecraft Interface Standards
GENERATION 2
Spacecraft Interface Standards
GENERATION 3
2004 2007 2010
Rel
ativ
e In
vest
men
t
Generation 1 Generation 2 Generation 3
JWSD-2 JWSD-3 JWSD-4 JWSD-5 JWSD-6
Gen “0”
Spacecraft as a collection of objects
ComputingSystem
radi
o
SPA-U linkSPA-S link
Spacecraft bus
e f
c dhg
a b
Payload
High-speeddownlink
a-h Spacecraft bus components
SPA-U Appliqué Sensor Interface Module (ASIM)
TBD Connector
STD USB
USBI/FCkt
IPPS SYNC
+28V
CPU
Reg. 3.3VDC
Switched28V
DIGITAL I/O (16)
+28RET
SINGLEPOINTGROUND
XTEDS
SRAM
NVRAM
AnalogFunctionCircuit
DACS(2)
A/D (16)
RS-422 Conv.
Ctrl
JumperArea
DIGITAL GND
A GNDX 28V
X 28 RETX +3.3VX 3.3V RET
SPORT (2)
CLK
1-8
9
10-25
26-41
42-43
44
45-48
49-5253-5455-56
MISC CTRL (4) 57-60
616263646566676869
GalvanicIsolation?
TEST CKTTEST BYPASS CONNECTOR (4)
70-73
ASIM bridges legacy components to the Plug and Play network
SPA-S = SpaceWire + SPA-U
SpacewireCrossbar
SPA-U
Hub
8SpaceWire
4USB
2Power
2Sync
1Single Point Ground
SPA-U
Combination of high-speed data transfer and device control
Satellite Data Model
CameraThermometer
GNC CompCurrentMonitor
RF
Application#1
Application#2
Application#N
Mission Code / Scripts
Application#i
Sensor Manager (SM) SM SMSM
CPU
ProcessorManager
Task Manager Data Manager
Sate
llite
Dat
a M
odel
SPA Development Status
• There are currently four working groups that have been defined by the SPA Technical Committee to develop SPA technologies and documents:– Gen 0. The Gen 0 working group pursues the development of near-term
hardware interface concepts based on commercial off-the-shelf (COTS) technologies
– Gen 1. The focus of the Gen 1 working group is similar to Gen 0, but focuses on the creation of radiation-hardened reference implementation.
– Software. The software working group emphasizes the development of the Satellite Data Model, the definition of xTEDS, and the creation of a Common Data Dictionary
– Advanced Technology. This working group explores trade studies and technologies and concepts beyond the Gen 1 horizon.
• SPA Guidebook - Draft– Provides a comprehensive overview of the SPA-U, SPA-S, and SDM
technologies– Spawn a series of standards and guidelines under the auspices of the
AIAA as the primary standards development organization.
Recently Released SPA-U Design Hardened Components
Design-hardened structured ASIC
Test Chip Submission
USB DeviceController
USBPHY
8051Style
InterfaceUSB
A0DATA
RDnWRnCSnINTR
Test Chip Submission
USB HubController
USBPHY
USB
USBPHY
USB
USBPHY
USB
USBPHY
USB
USBPHY
USB
DownstreamPorts
USB 1.1 five port hub
USB 1.1 Endpoint
Design-hardened structured ASIC
Recent Demonstrations
Pre-prototype Gen0 PnP Concept Plug and Play Panels
Gen0 Radiation Test Board Prototype AWM
Summary
• Introduced a new approach to achieving plug-and-play (PnP) in aerospace systems motivated by Operationally Responsive Space
• SPA seeks to achieve a PnP technology capable of rapidly forming a dynamic self-organizing system exploiting machine-negotiated interfaces
• Commercial interconnect standards, including USB, Spacewire, and Ethernet have been chosen for initial implementation
• Interconnect standards by themselves are not sufficient to achieve PnP– Distributed power – Time synchronization
• Software infrastructure makes possible a deeper idea for PnP– Support automatic component identification independent of
computing topology– Provide a data based approach to software development– Device independent interchange, robustness, and flexibility
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