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Research activitiesE. Nikolaidis
B. Ramaswamy
B. Dheenadayalan
A. Keerti
S. Mathew
P. Soundappan
D. Tiwary
Vibration and Reliability Lab
Friday, April 20, 2001
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Design under uncertaintyNoiselevel (db)
Cost ($)
Design concept 1
Design concept 2
Design concept 3
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Profit is uncertain and depends on selection of design concept
Profit ($)
Probability density of profit
0Loss
Which design is better ?
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Goals
• Study and understand advantages and limitations of methods for modeling uncertainty (classical probability, Bayesian probability, fuzzy sets, imprecise probabilities)
• Study methods for modeling a decision-maker’s preferences and attitude toward risk
• Address issues of lack of data and high computational cost
• Develop tools for making design decisions under uncertainty by combining the above methods
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2. Structural Dynamics; Modeling and suppressing internal resonances in
vibration isolators
Front of the car
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Transmissibility of real isolator
1
Transmissibility
1
System resonance, n
Isolator Resonances
n
Actual
Ideal
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Global Vehicle Model
Global OptimizerGlobal design variables
Local models
Load and stiffness requirements for components
Optimal safety factor of components
Knowledge-based design tools; considering details upfront in design