Hello. I am not sure if this forum would be the correct place to ask this question in (if it is not then I apologize for it) but here goes:
I have an exercise where I'm supposed to match different plots with each other (five openloop bode plots, five closedloop bode plots and five step response plots). Basically I am supposed to match an openloop plot with the correct closedloop plot and it's corresponding step response plot. I'm not really looking for the answers as I already have the full solution with a description (that gets me confused). Instead I'm having a hard time seeing the various relations between these plots which prevents me from actually solving the exercise.
I've had a similar exercise before where I was supposed to match bode plots (wasn't specified whether it was of an openloop or closedloop system...I assume the latter) and I didn't have problems at that one as I could relate several factors with each other (bandwidth with rise time, resonance peak with overshoots, static gain (DC gain?) with steady state value etc.)
I find it hard when I have three different plots to match together. More specifically I would say that I find it difficult to relate the openloop plots with the closedloop plots. Also I am still somewhat confused to what the exact relation between the steady state value of a time step response and the static gain in a Bode plot is. More than often in this type of exercise one is told to observe the static gain of the bode plots as they can easily identify the possible combinations but I don't really see how.
I've attached the picture of the plots. Sorry for the really bad quality but it's the best I can get at this moment.
Any help would be greatly appreciated.
I have an exercise where I'm supposed to match different plots with each other (five openloop bode plots, five closedloop bode plots and five step response plots). Basically I am supposed to match an openloop plot with the correct closedloop plot and it's corresponding step response plot. I'm not really looking for the answers as I already have the full solution with a description (that gets me confused). Instead I'm having a hard time seeing the various relations between these plots which prevents me from actually solving the exercise.
I've had a similar exercise before where I was supposed to match bode plots (wasn't specified whether it was of an openloop or closedloop system...I assume the latter) and I didn't have problems at that one as I could relate several factors with each other (bandwidth with rise time, resonance peak with overshoots, static gain (DC gain?) with steady state value etc.)
I find it hard when I have three different plots to match together. More specifically I would say that I find it difficult to relate the openloop plots with the closedloop plots. Also I am still somewhat confused to what the exact relation between the steady state value of a time step response and the static gain in a Bode plot is. More than often in this type of exercise one is told to observe the static gain of the bode plots as they can easily identify the possible combinations but I don't really see how.
I've attached the picture of the plots. Sorry for the really bad quality but it's the best I can get at this moment.
Any help would be greatly appreciated.
Attachments

97.7 KB Views: 120