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Project 11566: ITT Magnetic Damper

Project 11566: ITT Magnetic Damper. Tom Sciotto (IE), Project Leader Jacob Norris (ME) Tiffany Heyd (ME) Ben Hensel (ME). Dampening satellite vibrations. Imagine a satellite in orbit Rapid, jerky, but small motions (moving camera parts) on satellite induce vibrations

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Project 11566: ITT Magnetic Damper

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  1. Project 11566: ITT Magnetic Damper Tom Sciotto (IE), Project Leader Jacob Norris (ME) Tiffany Heyd (ME) Ben Hensel (ME)

  2. Dampening satellite vibrations • Imagine a satellite in orbit • Rapid, jerky, but small motions (moving camera parts) on satellite induce vibrations • But satellite is physically isolated; vibrations can’t dissipate • So: need a dampener!

  3. Satellite Design

  4. Space Environment • Wide temperature range • -40°C to 80°C • Too wide for hydraulic dampener • Vacuum and radiation • Rubber or solid-state dampener would harden • ITT decided: Electromagnetic dampening

  5. Eddy Current Dampening • Used an induced emf to resist a magnet • Train brakes:

  6. Lenz’s Law • “An induced current is always in such a direction as to oppose the motion or change causing it” • Electromagnetic interpretation or result of Newton’s Third Law

  7. How Eddy Currents Work • Conductor-Magnet relative motion induces current in conductor • Current creates magnetic field • Induced magnetic field opposes magnet; strength proportional to flux, or relative speed • Dampening constant, c!

  8. Eddy Currents in Action Magnet Wheel (rotates) Conductive Plate (but our application is linear not angular)

  9. Mathematical Model • Damped mass-spring system • Equation of Motion

  10. Mathematical Model Where ,

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