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View Full Version : Re: Generalizable 3D Kinetic/Kinematic Software



dlloyd80
12-03-1997, 07:57 PM
Hi all,

A few weeks ago I requested info on Generalisable 3D Kinematic & Kinetic
Software package. I had a lot of feedback mainly from those wanting find
the this type of software. Following is the original message, followed by
my summary of software. I hope it helps people.

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Does anyone know of a Generalisable 3D Kinematic & Kinetic Software
package? It would have the following features

1) solve inverse dynamics and possibly forward dynamics.
2) Used by someone who understands dynamics but do minimal coding or no
coding to implement the models.
3) Any marker set can be used to define any link segment model.
4) Can accept external force/moment inputs

We are not wanting to reinvent the wheel. Thanks in advance.
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2D

Even though I requested info on 3D packages some people sent info on 2D
packages, so I will present these for completeness.

BIOMAP
The package used here at UWA is called BIOMAP. It was essentially written
by Assoc Prof Graeme Wood and he can supply the package. Contact is
gwood@cyllene.uwa.edu.au.

BIOMECH
This package is developed by Dr Gordon Roberston and Friends. The software
and info can be found at
http://www.kin.ucalgary.ca/isb/data/robertson/robertson.htmlpack.


3D

I have found 3 Generalisable 3D Kinematic & Kinetic Software packages.

MOVE3D
This software is written by Tom Kepple at NIH. It essentially fits all the
requiremenst above. However, it uses input data in C3D file formats. The
user has to specify the model in a model file. Best of all this software is
freeware. The sofware can be downloaded by FTP, but you will have to
contact Tom Kepple first- email: kepple@bmli1.cc.nih.gov. Following are
Tom's answers to my questions
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Now to the big questions:

1) solve inverse dynamics and possibly forward dynamics.

MOVE3D does inverse dynamics only. (We do our forward dynamics with
the ADAMS software - MOVE3D can generate some ADAMS input files).

In addition to segmental and joint kinematics, MOVE3D can be used to
compute forces, moments and powers at the joints as well segmental
powers and energies.


2) Used by someone who understands dynamics but do minimal
coding or no coding to implement the models, ie students.

MOVE3D does not require any coding. The input are C3D files and a Model
File. Model Files are simple ASCII files that tell MOVE3D what segments
are to be included in the model and where the targets were placed on the
segments.

The biggest drawback to MOVE3D is that it can be difficult to learn the
program. This is a result of poor documentation and an archaic user
interface. (I guess you do get what you pay for.) Usually I am able to
help new users with problems by telephone or having them visit the lab
at NIH, but the distance to Australia makes these options impossible.
Thus any questions you have learning the program will have to be handled
via Email which can be a very slow process.



3) Any marker set can be used to define any link segment model.

There are limitations to the models that MOVE3D can use.

* Each segment must have at least 3 targets on it (maximum of 8).
However, targets can be shared. (For example a targer on the femoral
epicondyle could be used for both the thigh and leg.)

* Move3d link model can include feet, legs, thighs, hands, forarms,
arms, plevis, thorax and head. The user can include as many or as few of
these segments as they like. It is also possible for an experienced user
to build custom models although there are limitations. (For example the
program will only allow 15 total segments.)


4) Can accept external force/moment inputs

The software was designed to work with force plates and this allows
external forces to be applied to the feet (and hands).

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BODYBUILDER
This is commercial software sold by VICON. It also seems to be able to do
all my requirements - but it costs. Input are C3D files also. VICON can be
contacted via http://www.metrics.co.uk.


KINTRAK
Motion Analysis Corporation has a software program called KinTrak that
does what you are looking for, however, it requires input from our Video
Camera (s). Contacts are European Sales: Barry.OFlynn@motionanalysis.com
Domestic US Sales: Rebecca.Stine@motionanalysis.com, Web Site:
http://www.motionanalysis.com

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