Diff for "JZB1"

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?