2/14/2012

Robust Optimization of ABS Control Parameters

ABS for Automobiles
Anti-lock Braking System
-Prevents wheel lock-up to secure steerability and controllability in
emergency braking situations.
-If wheel rotation exceeds the stability limit, brake pressure will be
decreased to adjust the rotation to be within the stable region.
-Then, brake pressure will be increased again until it exceeds the stability
limit to maintain the rotation status of the stability limit region as long as
possible. 

Multi Objective Robust Design Optimization
Perform global exploration by considering the issue as
multi-objective optimization problem of
-Output average value: Maximization (minimization)
-Output standard deviation: Minimization
when probability distribution variation is applied to the input.

Optimization Process
Step1
-Scheduler: FMOGA (RSM Evaluation: 0.8/Linear annealing)
-First generation individuals: 25 DOE (Random)
-Number of generations: 15
-Number of robust sampling: 110 (Actual samples: 10, RSM: 100)
Step2, 3
-Scheduler: FMOGA (RSM Evaluation: 0.6/Fixed)
-First generation individuals: 20 Pareto solutions for previous Step
-Number of generations: 15
-Number of robust sampling: 110 (Actual samples: 10, RSM: 100)
CPU: Pentium 3 (1.0GHz) Dual (RAM: 780MB)
Total calculation time: Approximately 25 hours

http://www.cadfamily.com/HTML/Tutorial/Robust%20Optimization%20of%20ABS%20Control%20Parameters_305320.htm

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