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For a particular unity feedback system G(S)=$\frac{242(S+5)}{S(S+1)(S^2+5S+121)}$
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written 7.3 years ago by | • modified 7.3 years ago |
Arranging the above equation in time constant form,
G(S)H(S)=$\frac{242 x 5 (1+S/5)}{S(1+S)(1+\frac{5}{121} S+S^{2}\frac{1}{121} 121}$
=$\frac{10(1+S/5)}{S(1+S)(1+0.041S+S^2\frac{1}{121})}$
System consists of quadratic pole
Comparing the denominator $(S^2+5S+121)$ with the denominator of standard equation
$S^2+2ξw_nS+w_n^2,$
$w_n^2$=121
$w_n$=11 rad/sec
$2ξw_n$=5
ξ=$\frac{5}{(2 x 11)}$
ξ=0.2
The factors are:
Constant k=10
1 pole at the origin, $\frac{1}{S}$, …