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Telescope Vibration Isolation

Telescope Vibration Isolation. Hannah Dembowski Brian Ferraro Domenic Salvatore. The Problem. Vibrating at 150 microns (9 microns/pixel) Need to reduce to between 9 and 15 microns. 68-500 SERIES High-Capacity Lab Table. high load applications (over 350 lbs)

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Telescope Vibration Isolation

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  1. Telescope Vibration Isolation Hannah Dembowski Brian Ferraro Domenic Salvatore

  2. The Problem • Vibrating at 150 microns (9 microns/pixel) • Need to reduce to between 9 and 15 microns

  3. 68-500 SERIESHigh-Capacity Lab Table • high load applications (over 350 lbs) • unusually high centers of gravity and equipment with moving stages

  4. Vibration Isolation for Telescope Mounts • mobile observatory applications • walking around telescope tripod or pier induces vibrations • Reduce vibrations if pier or tripod is bumped

  5. 65 SERIES Floor Platform with STACIS® • piezoelectric isolators • platform custom designed for footprint

  6. Telescope

  7. Telescope Mount Design Options Design 1

  8. Telescope Mount Design Options Design 2

  9. Telescope Mount Design Options Design 3

  10. Modeling

  11. Governing Equations

  12. Design Comparison Input vibrations from PULSE data Predicted Final Vibrations after design implementation • Graphs show frequency, in Hz, on the x-axis • Graph on the left shows the input vibrations, in decibels, on the y-axis • Graph on the right shows each design’s final vibrations, in decibels, on the y-axis

  13. Design Comparison Input vibrations from PULSE data Predicted Final Vibrations after design implementation • Graphs are zoomed in to show frequencies below 100 Hz • Shows a reduction of greater than 20 decibels at frequencies below 100 Hz

  14. Future Steps • Refine SolidWorks models for more accurate moments of inertia • Take better low frequency measurements with different accelerometer • Amend possible mounting solutions • Concrete vs. iron/steel rods • Decide on and Implement solution • Get funding • Verify with building codes • Test solution • Measure final vibrations • New photos

  15. References • http://www.pier-tech.com/vibration_isolation_telescope_mount.htm • http://www.techmfg.com/products/labtables/68500.htm • http://www.techmfg.com/products/floorplatforms/65seriesfloorplat.htm

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