Impose 2nd Order Approximation?

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Mark Wood 2014-12-12

编辑： Mark Wood 2014-12-12

How do I impose 2nd order approximation to the system below?

1. Link to pic of system : System

2. Transfer function : G(s)

3. Plot of Root Locus : Root Locus

1 pole at, s=-2

1 pole at, s=-1.25

1 zero at, s=-0.452

A complex conjugate pair at, -0.117+/-0.051j

After imposing ' 2nd order approximation ' to system, estimate rise time, settling time & peak time when percentage overshoot is 20% ???

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