Generalized second-order system response to a unit step input

4 Generalized second-order system response to a unit step input 

The terms in the brackets can be written in the standard forms 10 and 9 in Table 3.1. 

From equation (3.57) it ean be seen that when there is no damping, a step input will eause the system to oseillate eontinuously at Wn (rad/s). 

From equation (3.56), when o C 1, the frequeney of transient oseillation is given by 

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