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Indicating the onset of instability on a graph

  1. Apr 7, 2009 #1
    Good day,

    1. The problem statement, all variables and given/known data
    Indicate on the graph the onset of instability.

    The graph:

    ClosedloopKp.jpg

    I really have no idea how I can indicate the onset of instability on such a graph.

    Thanks in advance!
     
  2. jcsd
  3. Apr 8, 2009 #2
    Why do you think your system is unstable?
     
  4. Apr 8, 2009 #3
    It isn't, that's the reason I really don't know how to indicate the onset of instability on that graph...
     
  5. Apr 8, 2009 #4
    Well then there's your answer... If it's not unstable, how can you indicate the point where it becomes unstable?
     
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