Review of the Research Program of the Partnership for a New Generation of Vehicles Fourth Report (1998) / Chapter Skim
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3 Systems Analysis
3 Systems Analysis
Pages 56-61
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From page 56... ...
It also provides the opportunity to study trade-offs between candidate subsystems during the technology selection process. The models facilitate the preparation of specifications for each candidate subsystem and support the establishment of engineering targets.
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From page 57... ...
PROGRAM STATUS AND FUTURE PLANS Modeling During the committee's review, the systems analysis technical team made a presentation describing the computer models being developed, showing typical simulation assumptions for specific vehicle configurations, detailing data on fuel economy for parallel and series hybrid vehicles, and describing the sensitivity of fuel economy to changes in vehicle mass. Detailed charts and supporting analysis were presented summarizing the timing and status of subsystem models for all the subsystems being considered.
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From page 58... ...
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From page 59... ...
(4) Voltage bus formulation create motor and generator equivalent circuit models develop power electronics model develop new control algorithms update component models (focus on transient response)
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From page 60... ...
The committee believes that probabilistic models of vehicle and subsystem costs, with confidence levels, will be very important for the technology selection process. The computer model should provide analysis and presentation of a complete cost picture for every vehicle configuration selected.
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From page 61... ...
The PNGV should create detailed, rigorous cost and design reliability models as soon as possible to support ongoing technology selection. These models should be continually upgraded as new information becomes available.
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