伝達関数法
G ( s ) = K ( T 1 s + 1 ) ( T 2 s + 1 ) {\displaystyle G(s)={\frac {K}{(T_{1}s+1)(T_{2}s+1)}}}
G ( s ) = K s 2 + 2 ζ ω n s + ω n 2 ( ζ < 1 ) {\displaystyle G(s)={\frac {K}{s^{2}+2\zeta \omega _{n}s+\omega _{n}{}^{2}}}\quad (\zeta <1)}
G ( s ) = K s ( T s + 1 ) {\displaystyle G(s)={\frac {K}{s(Ts+1)}}}