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README.mit
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FastHenry 3.0.1 information.
Updated May 28th 2012 by FastFieldSolvers, www.fastfieldsolvers.com
FastHenry is a program for the efficient extraction of inductances and
resistances of complex 3-D geometries of conductors.
Configuring for your machine:
1. Change to the fasthenry-3.0 directory
prompt % cd fasthenry-3.0
2. Configure for your machine (sets the compilation flags)
SunOS 4.x, IBM RS 6000's, and other 4.2/3 BSD systems(?):
prompt % config default
DEC 5000s:
prompt % config dec
DEC Alphas:
prompt % config alpha
Silicon Graphics:
prompt % config sgi
and then read the extra instructions in README.sgi
Linux:
prompt % config default
prompt % config x64
to force compile for x86 64bit machines
System V operating systems:
Sun Solaris:
prompt % config solaris
Hewlett-Packard HP-UX, and other System V operating systems:
This has not been thoroughly tested.
prompt % config sysV
Notes:
a. For Versions of solaris before 2.5, The "ranlib" command is obsolete and
doesn't exist.
Either remove the ranlib command from src/fasthenry/sparse/Makefile
or define a null ranlib command in your path or do "make -k all"
b. In the linking stage, if you get an error that "gethostname"
is undefined, then add "-DNO_GETHOSTNAME" to the CFLAGS line in
src/fasthenry/Makefile and src/zbuf/Makefile after doing config.
For instance
CFLAGS = -O -DFIVE -DNO_GETHOSTNAME
Compiling:
prompt % cd fasthenry-3.0.1
prompt % make all
produces the executables: fasthenry-3.0.1/bin/fasthenry
fasthenry-3.0.1/bin/zbuf
fasthenry-3.0.1/bin/ReadOutput
fasthenry-3.0.1/bin/MakeLcircuit
If you want to save space after "make all",
prompt % make clean
will clean up *.o and *.a files.
Documentation:
The manuals are in Acrobat Reader pdf format in the directory 'doc'
-------------------------------------------------------------
Major changes in 3.0.1 since version 3.0
- Added various stability bug fixes over original 3.0 distribution
- Added stability improvement under Linux
- Added various includes and other minor updates to avoid warnings
with latest versions of GCC
- Updated source code to compile on 64 bit machines
- Added Makefile option for 64 bit machines
-------------------------------------------------------------
Major changes in 3.0 since version 2.5
- Specify a nonuniform discretization of a reference plane to
capture small features in fewer elements.
- Two approaches for generating spice equivalent circuits are available:
1. An equivalent circuit for a single frequency.
2. A circuit which models the frequency
dependent resistances and inductances through a reduced state-space
representation
Comments: Method 1 will not model frequency dependent resistance
and inductance since it gives and R and L at the single specified
frequency. Method 2 will model the full effects up to some frequency.
- Major Bug fix:
For reference planes which form segments with different
widths in the x-direction versus the Y direction, the sizes weren't
computed correctly in version 2.0 and above. This has been fixed.
- The zbuf program now takes the ``-m'' argument to produce a
Matlab file for faster visualization in matlab. This is very beneficial for
large files since producing the postscript file can take $n^2$ time.
The matlab file can be viewed within matlab with the
fasthenry-3.0/bin/plotfastH.m matlab function. The file
zbuffile.mat would be produced with ``zbuf -m zbuffile'' which can
then be viewed in matlab with ``>> plotfastH('zbuffile.mat')''.
Also, you can modify the file src/zbuf/dump_struct.c to output in YOUR own
format instead of matlab.
- Sparse preconditioner. Specify -p shells to use a
preconditioner based on Byron Krauter's sparse inductance technique.
- Regurgitate the input file with -v to see what FastHenry
thinks it has read. Also can translate and reflect geometry before output.
-------------------------------------------------------------
Changes since Version 1.0
Version 1.5:
1. Better filament mutual inductance approximation for very thin segments.
2. Ability to specify ground plane holes. See example hole.inp and
some of the comments toward the end of the file hole.c (I have
not had a chance to update the manual.)
3. Other command line options. (Give an erroneous option at the command line
to see the added options)
4. Some bug fixes.
Version 2.0 - this is a far improvement over the past versions
In summary:
1. A better preconditioner which allows efficient analysis of
reference planes.
2. Accurate modeling with thin filaments.
3. More detailed manual
4. Many, many other features
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