Cell-based Architecture for Adaptive Wiring Panels: …llamocca/Research/murray2011_AWP_paper...Cell-based Architecture for Adaptive Wiring Panels: A First ... Scalable adaptive wirin

CellCell--based Architecture for based Architecture for Adaptive Wiring Panels: A First Adaptive Wiring Panels: A First

ApproachApproachVictor Murray11, Daniel Llamocca11, Yuebing Jiang11,

Marios Pattichis11

James LykeJames Lyke22, Stephen Achramowicz, Stephen Achramowicz22, Keith Avery, Keith Avery22

11University of New MexicoUniversity of New Mexico22Air Force Research LaboratoryAir Force Research Laboratory

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Outline

• What is a wiring harness?• Why would we want to make it reconfigurable

and adaptive?• Basic concept of adaptive wiring harness• Challenges• Cellular architecture for adaptive wiring

harness• Current Status• Future Work• Conclusions

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Outline




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What is a wiring harness?

• Packaging hierarchy from transistor to system

• Wires dominate the content of electronics in systems

• Harnesses are wires that form Level 4 connections

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Real World Example – Tacsat 2

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Outline




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Advantages

• Dramatic time reduction– Reduces weeks and months to minutes

• Flexibility– Accommodate last minute changes– Fixing errors after the fact

• Diagnostic enhancement– Form temporary probes without dismantling system

• Robustness– Ability to route around damage– Ability to make self-healing

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Outline




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Adaptive wiring concept

CB

A

A

B

C

CB

A

A

B

C

blank programmed

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Segmented (extended) adaptive panel

CB

A

A

BC

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Temporary probes can be inserted

CB

A

A

BC

V

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Fault management

CB

A

A

BC

Faulty connection

New good connection

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Physical Embodiment

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Placement and routing (two modules)

E

D

E

D

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Outline




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Challenges

• Bistable / multistable / persistent, low-power• Electrical performance

– Low resistance– Bandwidth – High-isolation (low crosstalk)

• Hot-switching• Compact • Low-cost

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Wiring Supply / Demand

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Length

Quantity

Supply (ex.)

Demand (OK)Case 1

Demand Case 2Over‐supply (wasteful)

Demand Case 3 (wiring starved, won’t work)

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Outline




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Simplified Depiction

Unplaced modulePlaced module

Cell

Cells

Scalable adaptive wirinpanel

Cell Management Unit

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“Unit cell”

Displaced unit cell

Unit cell

Mechanical mounting point

Power terminal (pin)

Signal terminal (pin)

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“East “ edge

Local I2C communications port

Routable wiring resources

Surface routing termini

Cell common I2C port

Cell local processing unit

“North“ edge

“South“ edge

“West“ed

ge

Cell –module I2C port

Unit cell details

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Outline




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Adaptive Wiring Panel with modules

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Interior details of module connections to panel

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Example Wiring Problem

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Cell Implementation

• Cells are self-contained (5cm x 5cm)• Contains local routing (~70 relays)• Communicate using six I2C busses

– 4 neighbors (N-E-W-S) (local)– 1 cell-to-module– 1 cell-to-host (global)

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Current Hardware (one cell)

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Top board ( adaptive surface)

Southcell board

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Cell Management Unit

• Manages global panel of cells– Computes connections– Manages cell and modules– Implements dynamic changes

• Implements wiring harness as netlist• Netlist programmed SPICE language• Route algorithms• Graphical User Interface (GUI) simplifies user

interaction

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Cell management Unit

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Five cells, two modules

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Example Problem

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Graphical User Interface

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Outline




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Future Work

• Increase demo to 64 tiles (8 cells x 8 cells)

• Development of MEMS switches (90% reduction in size, weight, and power)

• Improved hierarchical routing algorithms

• Self-healing demonstrations• Multi-panel manifold• Extension of ideas to three dimensions

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Outline




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Conclusions

• Adaptive wiring can have significant advantages over fixed designs (speed, flexibility, robustness)

• Adaptive wiring architecture has been described

• Cellular version of adaptive wiring harness has been designed and partial panel has been demonstrated

• Within next year a full scale version will be available for further study

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Acknowledgments

• Financial support– AFRL Space Vehicles– Air Force Office of Scientific Research (AFOSR/NE)

Discovery Challenge Thrust for Reconfigurable Cellular Electronic/Photonic Arrays (Dr Gernot Pomrenke)

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Cell-based Architecture for Adaptive Wiring Panels: …llamocca/Research/murray2011_AWP_paper...Cell-based Architecture for Adaptive Wiring Panels: A First ... Scalable adaptive wirin

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