Page 92 - basic control system
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SECOND-ORDER SYSTEM
❑ For a second-order system, the denominator of closed
loop transfer function (C.LT.F) is quadratic and the
coefficients of this equation are related to ξ and ω n
❑ The C.L.T.F for a standard second-order system is:
( )
=
( ) + +
❑ Where characteristic equation is s +2ξω s+ω n 2 = 0
2
n
❑ Second-order system can be transformed to show the
quantities of ξ and ω . Consider the general system
n
( )
= =
2
( ) + +
2
Where =
= 2
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