Open and closed loop system

Thread Starter

mo2015mo

Joined May 9, 2013
157
Hi my friends .. :)

While I were studying Control laboratory, i faced this question
Which of the following responses(as attached photo) represent closed loop or open loop system?? and which with magnetic brake or without magnetic brake ??

I answered them as
(a) closed loop without magnetic brake
(b) closed loop with magnetic brake
(c) open loop without magnetic brake
(d) open loop with magnetic brake

Are these answers Correct?? and Is there any reference help me to know more information about that??
 

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Thread Starter

mo2015mo

Joined May 9, 2013
157
okay,, assumed that step-input for all (drawn that by red color),,
taken values on vertical axis for all by inspection
 

LvW

Joined Jun 13, 2013
1,765
mo2015mo, can you please explain WHY do you think (see your first posting) that the responses in c) and d) are for a system with open loop?
 
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