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Design and Optimization: Status & Needs Dr. Wei Chen Associate Professor Integrated DEsign...
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Transcript of Design and Optimization: Status & Needs Dr. Wei Chen Associate Professor Integrated DEsign...
Design and Optimization: Status &
Needs
Dr. Wei ChenAssociate Professor
Integrated DEsign Automation Laboratory (IDEAL)Department of Mechanical Engineering
Northwestern [email protected], (847)491-7019
Http://ideal.mech.northwestern.edu//
Research Areas of IDEAL
Major Topics
•Robust Design & Optimization under Uncertainty (NSF)
•Metamodeling for Simulation-Based Design (Ford)
•Enterprise-Driven Multidisciplinary Decision Based Design (NSF)
•Model Validation (NSF)
Pratt & Whitney US Army
Ford
Motorola
GM
Industrial Applications
Alcoa, JD Power, etc.
State-of-the-Art: Efficient Probabilistic Optimization
MPP
f(u1, u2)
u1
u2
g=0
Opt 1Deter
RA Constr n
RA Constr 1
Opt 2Deter
RA Constr n
RA Constr 1
Cycle 1 Cycle 2MPP
Most Probable Point (MPP) Method for Efficient Reliability Assessment
Sequential Optimization and Reliability Assessment (SORA) Method
pdf of g
g0 gR
Red Area = Prob(ggR)=R
Inverse MPP Strategy
State-of-the-Art: Metamodeling Techniques for Simulation Based Design
CAE Model
Classification of Variables
Product/Process
ResponsesControlFactors
Noise Factors
A. Optimal Design of Experiments (DOE)
B. Sequential Metamodeling
0
0.5
1
0
0.5
10
200
400
C. Analytical Probabilistic Global Sensitivity
Analysis• Reduce the size of problem• Identify source for variance
reduction
E. Probabilistic Optimization
Confirmation & Metamodel Updating
D. Analytical Uncertainty Propagation
Demand
MARKETING TEAMCUSTOMER
PREFERENCES
Key Customer Attributes
1
GROUPS
EngineeringAttributes
2DesignOptions
ENGINEERING
State-of-the-Art: Multidisciplinary Decision-Based Design Framework
Total Lifecycle Cost
ACCOUNTING
3
CORPORATE
MANAGEMENT
Utility(Profit)
4
Optimized Design
and Price
5
Vision
Rapid concurrent design of material, product, and the associated manufacturing processes, optimizing quality, costs, and performance based on high fidelity modeling spanning the whole product realization and life cycle.
Product Design
Process Design
Material Design
Concurrent/Collaborative Optimal Material , Product, and
Process Design Decisions
Processing
Structure
Properties
PerformanceDesign Driven
Mapping Relation
Challenges/Research Thrusts
– Seamless communication with languages/representations across material scientists, product designers, and manufacturing process engineers.
– Problem decomposition/recomposition methods and modeling approach to reduce the interdependency (complexity) but to maintain the concurrency of subproblems.
– Rapid design optimization methods to employ high fidelity simulation programs that capture the life cycle requirements, with the consideration of uncertainty.
– Design synthesis methods to accumulate knowledge and experience that adapt to changes of design requirements.
– Adaptive design framework with decision support, knowledge accumulation, and support for incorporating business and costs modeling, for multi-level users with distributed, concurrent, and collaborative access.
– Model validation approach that requires the minimum amount of physical experiments and improves the confidence of using the result from optimization.