for RF Noise Suppression Trevor Vannoy APS Accelerator Systems - - PowerPoint PPT Presentation

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for RF Noise Suppression Trevor Vannoy APS Accelerator Systems - - PowerPoint PPT Presentation

Oct 08, 2023 117 likes •164 views

Stability Analysis of an Adaptive Notch Filter for RF Noise Suppression Trevor Vannoy APS Accelerator Systems Division Mentor: Tim Berenc Background 360 Hz 120 Hz 60 Hz 2 Reduced by ~ 30 dB Advanced Photon Source, Argonne National

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SLIDE 1

Stability Analysis of an Adaptive Notch Filter for RF Noise Suppression

Trevor Vannoy APS Accelerator Systems Division Mentor: Tim Berenc

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SLIDE 2

Background

Advanced Photon Source, Argonne National Laboratory 2

Reduced by ~30 dB 60 Hz 120 Hz 360 Hz

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SLIDE 3

Stability Analysis

Advanced Photon Source, Argonne National Laboratory 3

Nyquist stability criterion

  • More powerful than Bode methods
  • handles systems with time delays and high order
  • Derived from complex analysis techniques
  • # of times a mapped contour encircles of -1

determines stability

ϒz Γw Γ𝑥 = 𝑔(𝑨)

𝛿𝑨

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SLIDE 4

Advanced Photon Source, Argonne National Laboratory 4

Goals

Develop an accurate model of the system

  • Actual system consists of 400th order bandpass filters, external components, etc
  • Characterize dynamics and gains of all elements
  • Validate model through measurements
  • Want users to have knob values that correspond to actual parameters
  • Allows users to understand how far they are pushing the system
  • e.g., gain and phase margins