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Acknowledgement

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Irish Research Council for Science, Engineering and Technology ... Web: http://birc.nuigalway.ie. 1. EMBRACE: Inspiration and Goals. 2. Spiking Neural Networks (SNN) ... – PowerPoint PPT presentation

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Title: Acknowledgement


1
  • 2. Spiking Neural Networks (SNN)
  • Emulate biological neurons
  • Communicate through a series of spikes between
    neurons
  • Information encoded as frequency and magnitude
    of spikes
  • Provide rich non-linear dynamics for
  • Control applications, e.g. robotics control
  • Classifier applications (provide good solution
    given imprecise data)
  • Computationally more powerful than traditional
    ANNs
  • Connections scale exponentially with number of
    neurons

1. EMBRACE Inspiration and Goals
  • Modelled on biological neurons
  • Human brain 1013 neurons
  • 1,000 synapses per neuron
  • Fault Tolerant / Adaptive
  • Addresses brain repair by relocating neural
    synaptic connections

Biological neural network
SNN spike train sequence illustrating Neuron B
potential and output spike firing event
Hardware neural network
SNN neurons, synapses interconnect
  • 3. EMBRACE System Architecture
  • Goals
  • Mixed signal device
  • Low power
  • Analogue CMOS compatible neuron/synapse cell
  • Network on Chip (NoC) used for inter-neuron
    communication
  • NoC supports neuron packet firing rates (of the
    order of 10ms)
  • Scalable, configurable Network on Chip
    (NoC)-based SNN architecture, implemented on
    Xilinx Virtex-II Pro FPGA
  • 32 Neurons
  • 32 Synapses per Neuron
  • 8 Spike Generators
  • 2 Spike Monitors
  • Table Driven Routing
  • Genetic Algorithm used to configure
  • Network parameters
  • Synaptic Weights/Neuron Thresholds
  • Benchmark Applications
  • XOR classification problem
  • Inverted Pendulum control problem
  • Robust
  • Scalable
  • Reconfigurable

Average fitness
Best fitness
Evolved EMBRACE-FPGA hardware pole balance SNN
controller fitness
EMBRACE NoC-based Neural tile array
EMBRACE NoC-router and neural cell architecture
Spike activity in the EMBRACE neural cell
EMBRACE neural cell array
Hardware evolution platform for evolution of an
SNN-based pole balancing function
  • .
  • Acknowledgement
  • This research is supported by
  • Science Foundation Ireland under Grant No.
    07/SRC/I1169
  • Irish Research Council for Science, Engineering
    and Technology (IRCSET), International Centre
    for Graduate Education in Micro and Nano
    Engineering (ICGEE)
  • Xilinx University Programme
  • 5. Future Work
  • SystemC NoC-level traffic analysis
  • Hierarchical NoC
  • Small footprint fully, locally connected SNN
    Tile
  • NoC based inter SNN Tile communication
  • Reduced topology configuration memory
  • Fault detection/repair
  • Further application benchmarking
  • Contribute to the EMBRACE architecture

Seamus Cawley Electrical Electronic
Engineering, National University of Ireland,
Galway. Email seamuscawley_at_gmail.com Tel 353 91
493301 Web http//birc.nuigalway.ie
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