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Design >> Analog Design >> phase responce of a system
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Message started by raja.cedt on Mar 29^th, 2011, 5:12am

Title: phase responce of a system
Post by raja.cedt on Mar 29^th, 2011, 5:12am

hi,
can any one please tell me is there any way to predict phase response from step response of a system?

Thanks.
Raj.

Title: Re: phase responce of a system
Post by Rakesh on Mar 29^th, 2011, 7:02am

Hi,
yes, You can measure the rise time and the settling time of the step response and from there you can predict the zeta and natural frequency of second order system. Once this is know i think phase response is known. i assume you approximate your system as second order system
Rakesh

Title: Re: phase responce of a system
Post by boe on Mar 29^th, 2011, 8:30am

Hi raja.cedt,

Every L(inear)T(ime)I(nvariant) system is exactly defined by its step response.
All you need is the Fourier transform of your step response...

B O E