the Lab Equipment page.
describing the implementation of a multi-stage induced voltage triggered
the first and third
'coilgun basics' pages. Cleaned up the links page a bit.
experiment looking at the effect of flux
path enhancement is added to the experiments page.
a diagram on the launch
position experiments page.
a page describing the implementation of an induced
voltage trigger, and a page illustrating a method of winding
a neat, multilayer coil. Organised the experiments
main page into categories.
experiments looking at the effect of launch
position and a thyristor
fired coilgun. Updated the current
sensor page with another design. Also added a page concerning
of coil inductance using FEMM. Minor changes made to several
a page with images of
the pistol assembly sequence.
new site design.
a page describing the capacitor
test firing of the pistol accelerator.
details of the final design
of the boost converter.
a page to the maths section which shows how the energy
storage of an inductor circuit varies as a function of time. Added another link.
a boost converter circuit diagram to the Voltage
Converter design page.
some material to the pistol design pages...
It's getting there, slowly.
a theory section on electromechanical
energy conversion which develops a mathematical model of the dynamic behaviour
of a simplified linear motor. Added a rendering
of the current pistol design iteration.
the first Optimised Coil Parameters
page to illustrate the effect of coil outer radius on the central field strength.
Included a small experimental analysis to show the correlation between central
field strength and projectile energy. Added a link to Afuriel's
results of the following experiments -
pages covering the initial design and construction of a 3-stage electromagnetic
pistol. Converted tabulated results into scientific notation format. Also
corrected a really dumb efficiency calculation error in the open loop results.
Added a small analysis of the dynamic internal resistance of the battery
source. Added some links to new coilgun sites.
more typo's. Added some more images of the 16
Stage Opto Prototype showing the current state of development. Constructed
a new current sensor which
uses a smaller length of wire and so is less inductive. Added link
to a list of the resistivities of various metals.
some statements and added a note
to the coil construction issues page (1) concerning force maps vs stress maps.
Fixed a picture link on that page.
some of the results data - I was using an erroneous mass value for one of the
projectiles so the kinetic energy data was off. The difference was small but I
may as well try and be accurate :). Added some info about drag to the projectile
design page. Added a link to a new
some broken links and more typo's.
some typo's and added images of the 9-stage
induced voltage coilgun accelerator.
Systems goes live.