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  1. mercurous

    Testing Gain and Phase margin of multiple embedded loops

    FeX32: How much experience do you have in control systems analysis and theory? Please let me know if my explanation below is incorrect. Otherwise, I am still inclined to agree with sreid. I have been doing more reading and am now more inclined than before to think that you need break each...
  2. mercurous

    Testing Gain and Phase margin of multiple embedded loops

    lacajun: That is my train of thought as well, but I have some more experienced collegues who are disagreeing with me. I have done about 6 hours of reading this week on the subject (books and online) and have yet to find a definative answer. However, I was able to come up with an example that...
  3. mercurous

    Testing Gain and Phase margin of multiple embedded loops

    Yes, I can measure the gain and phase margin of each little loop. The question is, do I have to? Or does measuring the GM and PM of the main loop suffice? Please link to reading material if you have some on this. Thanks!
  4. mercurous

    Testing Gain and Phase margin of multiple embedded loops

    We are testing the margins of stability on a rather complicated feedback control system. In this system, the feedback block contains IIR filters implemented within an FPGA. We had issues with these IIR filters themselves becoming unstable intermittently (while running the main control open or...
  5. mercurous

    More GFCI Breaker Mysteries

    Thanks for all your help guys. I will try those things out.
  6. mercurous

    More GFCI Breaker Mysteries

    We have a set of outlets powered by a GFCI breaker. We plug one surge protector into the outlet and turn the surge protector off. We then start plugging equipment in (the surge protector is still off) and the GFCI breaker trips. We have tried different surge protectors and different outlets...

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