FAQ  •  Login

Timing Results, Kinematics Analysis

<<

Dan Negrut

Global Moderator
Global Moderator

Posts: 833

Joined: Wed Sep 03, 2008 12:24 pm

Unread post Wed Mar 24, 2010 10:46 am

Timing Results, Kinematics Analysis

Post any timing results you get for the Kinematics Analysis in HW 10 here.
<<

ME751Anne

ME751 Student

Posts: 28

Joined: Tue Mar 02, 2010 10:14 pm

Unread post Fri Mar 26, 2010 9:36 pm

Re: Timing Results, Kinematics Analysis

r-w = 2078.021 s (~35 min)

r-p = 1778.619 s (~30 min)
<<

Dan Negrut

Global Moderator
Global Moderator

Posts: 833

Joined: Wed Sep 03, 2008 12:24 pm

Unread post Sat Mar 27, 2010 5:02 pm

Re: Timing Results, Kinematics Analysis

ME751Anne wrote:r-w = 2078.021 s (~35 min)

r-p = 1778.619 s (~30 min)


are you getting the same results in both cases?  I hope you do.
And if you did, it means that you got it right.  In which case, you should have answered your own post that i just answered two minutes ago.  I see no flaw in my logic...
dan
<<

ME751James

ME751 Student

Posts: 13

Joined: Tue Mar 02, 2010 10:20 pm

Unread post Tue Apr 06, 2010 7:58 pm

Re: Timing Results, Kinematics Analysis

For 10000 calculations (0.001s)

r-w = 416s
r-p = 481s

For 500 calculations (0.02s)

r-w = 24.5s
r-p = 28s

I didn't include rendering times, just calculations of position, velocity, and acceleration.
<<

ME751Chris

ME751 Student

Posts: 55

Joined: Tue Mar 02, 2010 10:15 pm

Unread post Tue Apr 06, 2010 10:35 pm

Re: Timing Results, Kinematics Analysis

for step size 0.02 for 10 seconds:
r-w formulation 6.6s
r-p formulation 6.1s

only calculations of pos vel and acc of both points p and q
<<

ME751Toby

ME751 Student

Posts: 4

Joined: Tue Mar 02, 2010 10:38 pm

Unread post Wed Apr 07, 2010 2:32 pm

Re: Timing Results, Kinematics Analysis

I used h=0.01 for 10 seconds of simulation.

r-p: 205.72 sec
r-w: 205.64 sec

Looks like I am slow but consistent.
<<

Dan Negrut

Global Moderator
Global Moderator

Posts: 833

Joined: Wed Sep 03, 2008 12:24 pm

Unread post Wed Apr 07, 2010 4:06 pm

Re: Timing Results, Kinematics Analysis

ME751Toby wrote:I used h=0.01 for 10 seconds of simulation.


Toby - i think you should have had h=0.02, that would have cut the CPU time in two...
dan
<<

ME751Kyou

ME751 Student

Posts: 5

Joined: Tue Mar 02, 2010 10:17 pm

Unread post Wed Apr 07, 2010 11:56 pm

Re: Timing Results, Kinematics Analysis

step size: 0.02
r-p formulation: 24.379 s
r-w formulation: 26.141 s
<<

ME751Praveen

ME751 Student

Posts: 4

Joined: Tue Mar 02, 2010 10:19 pm

Unread post Thu Apr 08, 2010 1:02 am

Re: Timing Results, Kinematics Analysis

r-w =385s
r-p = 352s
<<

ME451Tyler

ME751 Student

Posts: 25

Joined: Tue Mar 02, 2010 10:19 pm

Unread post Thu Apr 08, 2010 1:10 am

Re: Timing Results, Kinematics Analysis

r-w: 60sec
r-p: 65sec
<<

Rob Bradford

ME751 Student

Posts: 7

Joined: Tue Mar 02, 2010 10:16 pm

Unread post Thu Apr 08, 2010 2:35 am

Re: Timing Results, Kinematics Analysis

r-omega formulation: ~30 minutes

r-p formulation: ~34


These numbers should be taken with a gigantic grain of salt as I've just realized my laptop crunches matlab code at about ~1/10 the speed of a CAE computer.  Go figure.

On a reasonable computer, I'd guess closer to 4 and 5 minutes, respectively.

@Anne: Glad you measured your time out in milliseconds.
<<

Dan Negrut

Global Moderator
Global Moderator

Posts: 833

Joined: Wed Sep 03, 2008 12:24 pm

Unread post Thu Apr 08, 2010 6:46 am

Re: Timing Results, Kinematics Analysis

Rob Bradford wrote:r-omega formulation: ~30 minutes
r-p formulation: ~34
These numbers should be taken with a gigantic grain of salt as I've just realized my laptop crunches matlab code at about ~1/10 the speed of a CAE computer.  Go figure.

it's time to invest in new hardware.
dan
<<

ME751Arman

ME751 Student

Posts: 7

Joined: Tue Mar 02, 2010 10:19 pm

Unread post Thu Apr 08, 2010 11:44 am

Re: Timing Results, Kinematics Analysis

stepsize = 0.02
r - omegaBar ~145
r - p ~ 140
<<

ME751Martin

ME751 Student

Posts: 5

Joined: Tue Mar 02, 2010 10:37 pm

Unread post Fri Apr 09, 2010 6:11 pm

Re: Timing Results, Kinematics Analysis

Hmm my results are kind of slow. But Matlab is occupying one thread at 100% during simulation. I should test it on a different machine as well.
r-p: 753s
r-w: 917s
stepsize:0.02
<<

HammadM

Supreme Overlord
Supreme Overlord

Posts: 37

Joined: Wed Sep 03, 2008 12:23 pm

Unread post Mon Apr 12, 2010 5:57 pm

Re: Timing Results, Kinematics Analysis

Tolerance: 1.E-8
Step size:  .02
Steps:      500

r-p:        .577 [sec]
r-omega: .546 [sec]
Next

Return to ME751 Spring 2010: Advanced Computational Multibody Dynamics

Who is online

Users browsing this forum: No registered users and 1 guest

cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by ST Software.