TAGUCHI METHOD for DYNAMIC PROBLEMS SIGNAL - TO ...

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P.R. Apte : 3-Day Taguchi Method Workshop at UNIMAP 28Feb-1Mar 2012RELATIONSHIP BETWEEN S/N RATIO AND Q a Q a = K' [ (σ . {µ o / µ} ) 2 ] Q a = K‘. {µ o } 2 [ (σ / µ) 2 ] Q a = K (σ / µ) 2 where K, new constant = K‘. {µ o } 2 Q a minimizing is equivalent to maximizing {1/Q a } S/N Ratio, η = Log Form of {1/Q a }Q a’ = η = 10 Log 10 [ µ 2 / σ 2 ]28Feb-1Mar 2012 P.R. Apte : 3-Day Taguchi Method Workshop at UNIMAP S/N ratio (Dynamic) - 7TAGUCHI'S TWO-STEP PROCEDUREWhat you need to do?1. Maximize η = 10 Log 10 [ µ 2 / σ 2 ]2. Adjust Mean on Target without disturbing the Varianceby a Scaling Factor (eg. deposition time)Any target can be adjusted without having to reoptimize Unconstrained optimization Development of sub-systems to take place in parallel R & D time reduced28Feb-1Mar 2012 P.R. Apte : 3-Day Taguchi Method Workshop at UNIMAP S/N ratio (Dynamic) - 8Dyn S/N Ratio - 4
P.R. Apte : 3-Day Taguchi Method Workshop at UNIMAP 28Feb-1Mar 2012ROBUST DESIGN METHODOLOGY2 - STEP OPTIMIZATIONSTEP 1 :REDUCE VARIATION IRRESPECTIVEOF TARGET VALUESTEP 2 :ADJUST PERFORMANCE ON TARGETLEAVING VARIATION UNDISTURBEDFREQUENCY OR PERFORMANCE6050403020100STEP 2 STEP 1STARTm µPARAMETER SETTINGS28Feb-1Mar 2012 P.R. Apte : 3-Day Taguchi Method Workshop at UNIMAP S/N Ratio (dynamic) 9IDENTIFICATION OF SCALING FACTOR DOES EVERY CONTROL FACTOR HAVE EFFECT ON 'η' AND 'µ' ?FACTORS THAT HAVE SIGNIFICANT EFFECT ON 'η' ---> MAXIMIZE 'η'FACTORS THAT HAVE SIGNIFICANT EFFECT ON 'µ' BUT NO EFFECT ON 'η‘---> SCALING FACTORFACTORS THAT NEITHER EFFECT 'η' NOR 'µ'---> NEUTRAL FACTORS( OPERATIONAL EASE, COST ETC.)28Feb-1Mar 2012 P.R. Apte : 3-Day Taguchi Method Workshop at UNIMAP S/N ratio (Dynamic) - 10Dyn S/N Ratio - 5
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