The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of ___________________? / Process Control and Instrumentation / By admin The second order system with the transfer function 4/(s2 + 2s + 4) has a damg ratio of ___________________? A. 2.0B. 0.5 C. 1.0 D. 4.0