New to AnyBody Modeling System

Archive AnyScript Yahoo archive
1

Hi, I am Chew Yee from Monash University.
I am using this software to model the human arm for stroke
rehabilitation purpose. I have developed the arm model by using the
FreePostureMove example in repository 7 and also my mathematical and
control model in MATLAB and Simulink. However, I have difficulties
in combining this 2 model.

  1. From the FreePostureMove example, the Arm is moved by changing
    the angle with time. However, I need to input the torque applied on
    each joint to the model, and obtain the angular position and angular
    velocity. Can I do this in AnyBody?

  2. From the console application, there is no command for exporting
    the model(the skeleton figure). Can I export this figure in realtime?
    As I know, pre-recorded frames is the easiest method, but the arm
    model with 7 DoF has too many possibilities, which I don’t think it is
    suitable for my problem.

  3. I have go through the examples, and I can’t find any simulation
    of fingers. May I know is it possible to model and simulate the
    fingers in Anybody?

Thank You.

Regards,
Chew Yee

2

Chew Yee,

To answer your 3rd Question, there is a paper modeling single finger by Dr. Wu:

Analysis of musculoskeletal loading in an index finger during tapping
.Â
Journal of Biomechanics
, Volume
41
, Issue
3
, Pages
668
-
676J
.
WU

There is also a presentation in the Webcast. You might want to take a look.
I will leave it to other people to answer your remaining questions. =)

Thanks,
Leng-Feng

— On Mon, 10/6/08, kcyee8665 <kcyee8665@gmail.com> wrote:
From: kcyee8665 <kcyee8665@gmail.com>
Subject: [AnyScript] New to AnyBody Modeling System
To: anyscript@yahoogroups.com
Date: Monday, October 6, 2008, 9:32 AM

         Hi, I am Chew Yee from Monash University.

I am using this software to model the human arm for stroke

rehabilitation purpose. I have developed the arm model by using the

FreePostureMove example in repository 7 and also my mathematical and

control model in MATLAB and Simulink. However, I have difficulties

in combining this 2 model.

  1. From the FreePostureMove example, the Arm is moved by changing

the angle with time. However, I need to input the torque applied on

each joint to the model, and obtain the angular position and angular

velocity. Can I do this in AnyBody?

  1. From the console application, there is no command for exporting

the model(the skeleton figure). Can I export this figure in realtime?

As I know, pre-recorded frames is the easiest method, but the arm

model with 7 DoF has too many possibilities, which I don’t think it is

suitable for my problem.

  1. I have go through the examples, and I can’t find any simulation

of fingers. May I know is it possible to model and simulate the

fingers in Anybody?

Thank You.

Regards,

Chew Yee

[Non-text portions of this message have been removed]

3

Hello Chew Yee,

1.) AnyBody is based on inverse dynamics, and therefore the motion is
given and forces are the output. So simply applying a torque will not
influence the joint position. A way around would be to do an extra
optimisation loop around the model - a so called inverse-inverse analysis.

You can find a short abstract showing an analysis where the motion of the
ankle joints has been optimized in a bicycle motion here:
http://www.anybody.aau.dk/pdf/inverse.pdf

2.) Maybe recording the frames with the AnyCamera class could do this
for you. Please have a look at the last newsletter where you can find a Tips
and Tricks section describing the Camera:
http://www.anybodytech.com/116.0.html?&tx_ttnews[tt_news]=49&tx_ttnews[backP
id]=37&cHash=7c66cbadd4

3.) As Leng-Feng pointed out, John Wu did some work on the (index)
finger recently. But up to now no complete hand is implemented in the
Repository.

Please ask again if you have any further questions.

Best regards,

Sebastian

From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of kcyee8665
Sent: 6. oktober 2008 15:33
To: anyscript@yahoogroups.com
Subject: [AnyScript] New to AnyBody Modeling System

Hi, I am Chew Yee from Monash University.
I am using this software to model the human arm for stroke
rehabilitation purpose. I have developed the arm model by using the
FreePostureMove example in repository 7 and also my mathematical and
control model in MATLAB and Simulink. However, I have difficulties
in combining this 2 model.

  1. From the FreePostureMove example, the Arm is moved by changing
    the angle with time. However, I need to input the torque applied on
    each joint to the model, and obtain the angular position and angular
    velocity. Can I do this in AnyBody?

  2. From the console application, there is no command for exporting
    the model(the skeleton figure). Can I export this figure in realtime?
    As I know, pre-recorded frames is the easiest method, but the arm
    model with 7 DoF has too many possibilities, which I don’t think it is
    suitable for my problem.

  3. I have go through the examples, and I can’t find any simulation
    of fingers. May I know is it possible to model and simulate the
    fingers in Anybody?

Thank You.

Regards,
Chew Yee

[Non-text portions of this message have been removed]