VLSI Design and Embedded Systems Research Group VLSI Design and Embedded Systems Research Group

mittenturkeyΗλεκτρονική - Συσκευές

26 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

89 εμφανίσεις

Reconfigurable System
Reconfigurable System
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on
on
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Chip Platform for
Chip Platform for
Satellite On
Satellite On
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Board Computing
Board Computing
Title of your Project
Faculty of
Engineering and Physical
Sciences
VLSI Design and Embedded Systems Research Group
VLSI Design and Embedded Systems Research Group
Introduction
Introduction
The activities of the VLSI Systems Research Group are related to efficient
system design involving front-edge microelectronics technologies, advanced
software development and biologically inspired artificial intelligence techniques.
The research topics covered by the group are:
• System-on-a-chip design - FPGAs & ASICs
• Reconfigurable computing
• Algorithms and structures for efficient data and image processing on-board
satellites
• Intelligent systems for on-board data processing and control
• Connectivity, networking and distributed computing in satellite clusters
• Wireless sensor networks
Academic Staff
Dr. Tanya Vladimirova
(T.Vladimirova@surrey.ac.uk)
Research Fellow
Dr. Xiaofeng Wu
Research Students
Mrs. Roohi Banu
Mr. David Barnhart
Mr. Christopher Bridges
Mr. Abdul-HalimJallad
Mr. Jean Paul
Mr. Kawsu Sidibeh
Mr. Guoxia Yu
Miss Siti Yuhaniz
Sub
Sub
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Kilogram Satellite Design
Kilogram Satellite Design
Satellite
Satellite
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on
on
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a
a
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Chip Design
Chip Design
Distributed Computing for Satellite Clusters
Distributed Computing for Satellite Clusters
Flying in Formation
Flying in Formation
On
On
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Board Image Processing
Board Image Processing
1. Automatic Image Registration and Change Detection
This research is concerned with the
development of an Automatic Change
Detection System (ACDS) for flood
monitoring from space. Low-complexity
mathematical algorithms are investigated
for application on board small satellites.
2. Multispectral Image Compression
Due to limited bandwidth and restricted storage resources, multispectral
image compression becomes the most critical on-board processing
requirement. Multispectral images, taken in 3 to 25 bands, have intrinsic
spectral redundancy that can be removed by spectral decorrelation,
which requires band registration.
3. On-Board Encryption
This research is aimed at an optimal and reliable (fault-tolerant)
implementation of the AES algorithm so that is satisfies on-board
resource constraints of small satellites in terms of power, area and
speed.
Optimization of IEEE 802.11 for Inter
Optimization of IEEE 802.11 for Inter
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Satellite Links
Satellite Links
ESPACENET: SPACE WIRELESS SENSOR
ESPACENET: SPACE WIRELESS SENSOR
NETWORKS
NETWORKS
ESPACENET is a £1-million joint project funded by EPSRC.
The project aims to develop flexible, reconfigurable, evolvable,and
intelligent multi-spacecraft sensing networks for aerospace-based
monitoring and diagnostics. A demonstration CubeSat mission is under
development to test novel technologies at LEO, including 1) inter-
satellite communication using WiFi intersatellite links; 2) distributed
computing within the satellite network based on multi-agent
communication; 3) reconfigurable computing in space for single event
upset (SEU) mitigation.
A novel middleware is
designed to support
distributed computing in
satellite clusters:
PCBSat
Satellite-on-a-printed-circuit-board
- 10 x 10 x 2 cm
- 250 g
- 3V, 700 mW
- cost - less than £2,500 for entire satellite
• If spacecraft flying in close
formation are capable to collaborate,
they can achieve the mission aims at
lower costs and with increased
reliability compared to larger single
platform missions.
• In this research we aim to develop
a distributed computing system
operating over a network of satellite
nodes for formation flying missions.
• The middleware takes into
consideration application-specific
factors, such as, formation flying
dynamics, unreliable inter-satellite
links and highly resource-
constrained nodes (in terms of mass
and power).
• Design requirements include
scalability, fault-tolerance, low-
power, low memory (both static and
dynamic) requirements and real-
time performance.
Agent Communications language (ACL)
Publish-subscribe
communications
Services Layer
Application Agents
Migration
Quality of Service
Aggregation
Infrastructure - Operating
System + hardware
MISA
Middle
ware
Directed Diffusion
Routing
Resource management
MAC + PHY
Local resource manager
Distributed resource
manager
(a)
(b)
(c)
(d)
Autonomous band registration results:
Processing of an urban area image:
(a) raw image; (b) image after band registration;
(c) image after band registration and radiometric
calibration;(d) image after band registration,
radiometric calibration, and sub-pixel extension
registration
(a) Plain multi-spectral
satellite image;
(b) Decrypted image (AES,
OFB mode) with SEU at
the 20,000
th
block;
(c) Decrypted image with
SEU at the 40,000
th
block.
Payloads
Data Bus
OBC
EPS
Memory
Camer
a
LEON3
FPGA
MEMs
Antenna
Comms
MOEA
Batteries
Solar
Array
ADCS
(c) CubeSat based pico-satellite design
(a) A ‘string of pearl’ satellite
network
LEON3
CORE
JOP
CORE
AMBA2 Bus
Memory
Controller
External
RAM
External
ROM
APB
Bridge
Payloads
Camera
Antennas
ADCS
FPGA/ SoC
Design
Debug
RS232
JTAG
(b) A dual-core system-on-chip to support
multi-agent distributed computing
Operating System API
Operating
System
Communications
Processing
Storage
Middleware
Middleware API
Distributed Application
Host 1
Operating System API
Operating
System
Communications
Processing
Storage
Middleware
Middleware API
Distributed Application
Host 2
Network
• A generic single-chip computing
platform for use on board small
spacecraft, which can be reconfigured
locally or remotely is designed.
• The platform features a highly
modular structure that can be
quickly and easily customised to
produce specific purpose controllers
for data processing, communication
and control of different spacecraft subsystems and payload blocks.
• Targeted at SRAM-based FPGAs, the system is capable of partial run-
time reconfiguration, which allows electronic circuits on-board satellites to
upgrade/self-repair faulty blocks while the remaining part of the system is
fully operational.
•The concept of SoC-based reconfigurable computing on board satellites
was pioneered in a paper published at the MAPLD’00 conference, is now
widely adopted by spacecraft designers all over the world.
Ground Station Design
Ground Station Design
Requirements for new space system architectures are now emerging
for numerous applications. Analogous to proliferating terrestrial
wireless sensor networks, massively distributed space sensor
networks will enable the observation of real-time multi-point
phenomenology. Novel cost-effective, mass-producible solutions are
under investigation and development including satellite-on-a-chip
(SpaceChip), satellite-on-a-printed circuit board (PCBSat), and
satellite-on-a multichip module (MCMSat). Our focus is on ensuring
the survivability and power efficiency of these technologies.
Flood detection
analysis of
North Sumatra
using NIR
differencing
Dr. Tanya Vladimirova
Group Leader