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  . Open source software: BSD Y2K patch, [[ http://dirvish.org/ | Dirvish backup software ]]
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JVB/KHL 2018/07/18 agenda

  • KHL intro:

    • MSEE UCB 1974 (Josephson Logic) 1977 TMAG paper

    • Integrated circuits: Tektronix, consulting, two startups
    • IEEE 1149.4 analog boundary scan standard

    • ICUBE routed early internet (failed after $e7 -> -$e7 )

    • ICID ( $e6 but "shoulda" made RFID a $e10 business )
    • ~20 papers; 1 with Rob Daasch that founded new field (300? citations)

    • ~12 patents incl. foreign (dislike, but protects customers from copycat trolls)
    • Open source software: BSD Y2K patch, Dirvish backup software

    • Married, no kids, helped wife earn MD instead


  • JVB intro:

    • CV and recent papers on Halbach wheels (germane to KHL research)
    • Spacegrant for EM launch?
    • What do you wish you had time to work on?


  • Launchloop:

    • active "hobby" 1980 to 1988, completing work now
    • 1985 AIAA conference paper, pubs, presentations to space advocacy groups

    • Independent invention by many others since ( ie John Knapman PhD in UK )
    • Two research groups currently active, one with >$1M funding + 4 professionals

    • PowerLoop , first practical application: MWhr power storage (can scale beyond TWhr)


  • Questions:

    • Practical/empirical motor design books (theory/math AND detailed measurement)
    • Linear induction motor - conservative maximum thrust/m2

    • Inductrack - estimate ultrahigh speed drag/lift ratio (skin effect)
      • Power = radians × ρ × v³ / LD ( LD must be >> 1e5 )

      • predictive/adaptive control instead, loop gain, computation, and redundancy
    • High inertia <- Halbach DC Motor <- Induction generator

      • Stability: can inertia synchronize generator?
    • 3D Motor FEM modelling?
  • Bolt/Rotor design
    • deflection at ends
    • ≈ 4 kg/m, 3 cm cross section
    • 200 kN induction motor --- how long, how stable?
    • velocity transformer track: air core flat windings, diamagnetic spacing stabilization?

JZB1 (last edited 2018-08-29 01:22:13 by KeithLofstrom)