The equation should be
X ( s ) = A ( Im ( G p ( i ω ) ) ω s 2 + ω 2 + Re ( G p ( i ω ) ) s s 2 + ω 2 ) + other stable terms. {\displaystyle X(s)=A\left(\operatorname {Im} \left(G_{p}\left(i\omega \right)\right){\frac {\omega }{s^{2}+\omega ^{2}}}+\operatorname {Re} \left(G_{p}\left(i\omega \right)\right){\frac {s}{s^{2}+\omega ^{2}}}\right)+{\mbox{other stable terms.}}}
Return to errata.
