I m p e d â n c i a m e c â n i c a Z_r s ( i omega ) é : â â é ( a ) [m_r s] overset(¨)(vec x) + [c_r s] overset(˙)(vec x) + [k_r s] vec x ( b ) {X_r ( i omega ) X_s ( i omega )} ( c ) - omega^2 m_r s + i omega c_r s + k_r s

( c ) - omega^2 m_r s + i omega c_r s + k_r s