Preliminary Design Consideration The desired closed-loop poles on s plane Constant Mp loci Constant ts loci or Constant loci of second-order system of second-order system Constant wn loci of second-order system ◆j 53% M=16% 16% jω 4.5% 0.2 M-0.25% 0.5 0.7 -8 -6 -4 -2 O 0.9 M≤16% 0% 1.0 1≤2 o, arccos 509 0.25% 0.7 1=0.5 1.0 0.5 2.5s 4.5% 0.2 3 16% 53%100% 1≤2sPreliminary Design Consideration • The desired closed-loop poles on s plane Constant Mp loci or Constant ζ loci of second-order system Constant ts loci of second-order system Constant ω n loci of second-order system