Computer Aided robust design Robust System Design 16881 mit 人 Session #11
Computer Aided Robust Design Robust System Design 16.881 Session #11 MIT
Engineering Simulations Many engineering systems can be modeled accurately by computer simulations Finite Element Analysis Digital and analog circuit simulations Computational Fluid Dynamics Do you use simulations in design analysis? How accurate reliable are your simulations? Robust System Design mit 人 16881 Session #11
Engineering Simulations • Many engineering systems can be modeled accurately by computer simulations – Finite Element Analysis – Digital and analog circuit simulations – Computational Fluid Dynamics • Do you use simulations in design & analysis? • How accurate & reliable are your simulations? Robust System Design 16.881 Session #11 MIT
Simulation desigr Optimization Formal mathematical form minimize y=f(x) minimize weight subject to h(x)=0 subject to height=23 8(X)≤0 max stress<o8Y fx Simulation h(x) g(x) Robust System Design mit 人 16881 Session #11
Simulation & Design Optimization • Formal mathematical form minimize y = f ( x) minimize weight subject to h ( x) = 0 subject to height=23” g ( x) ≤ 0 max stress<0.8Y f( x) x Simulation h ( x) g ( x) Robust System Design 16.881 Session #11 MIT
Robust Design Optimization Vector of design variables x Control factors(discrete vs continuous) Objective function(x) S/N ratio(noise must be induced) Constraints h(x),g(x) Not commonly employed Sliding levels may be used to handle equality constraints in some cases Robust System Design mit 人 16881 Session #11
Robust Design Optimization • Vector of design variables x – Control factors (discrete vs continuous) • Objective function f( x) – S/N ratio (noise must be induced) • Constraints h ( x), g ( x) – Not commonly employed – Sliding levels may be used to handle equality constraints in some cases Robust System Design 16.881 Session #11 MIT