drive by wire – “what will be its impact on tomorrow’s vehicles?” craig stephens ford motor...
TRANSCRIPT
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Drive by Wire –
“What Will Be Its Impact
On Tomorrow’s Vehicles?”
Craig Stephens
Ford Motor Company
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Why Drive by Wire
Through the use of of electronics and software in drive by wire systems we can offer our customers new functions and improved attributes:
– Fuel economy
– Ride and handling– Driveability– Interaction with the environment and
vehicle surroundings
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Drive by Wire Considerations
• What value or enhancement does the system provide to the customer?
• How does the customer interact with the system?
• How do we manage the added system complexity?
• These new systems must be safe and reliable
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What can we learn from other Industries?
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Unique Automotive Factors
• Operator training
• Service & after market modification
• Cycle time
• Production volumes
• Product use
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Complexity Considerations• Safe operation must be ensured as the complexity of the
systems increases:– Increased complexity creates new modes that have to be assessed
and managed with respect to safety, reliability and availability– Interactions between previously separate subsystems (e.g. brakes &
powertrain) create coupled modes which must be managed
• Has consequences for design, release, manufacture and service
• The management of the complexity will inevitably rely heavily on software for design, analysis,and implementation
• The increased complexity is often invisible
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Techniques & Tools
• Techniques that help bridge the gap between written functional requirements and the end design
• Techniques to analyse behaviour in subsystems and systems that exhibit modal and continuous behaviour
• Hardware and Software in the loop systems to enable system analysis and testing
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Standards & Best Practices
• Customer interface
• Architectures• Operating systems and
communication protocols
• Process
• Tool interfaces
• Model standards
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9
Conclusions