Go to Post [Hints] usually come out right before Christmas. Be patient, and go do something else with your life while you still have time! - Libby K [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 02-02-2014, 10:37
Ether's Avatar
Ether Ether is offline
systems engineer (retired)
no team
 
Join Date: Nov 2009
Rookie Year: 1969
Location: US
Posts: 8,100
Ether has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond repute
trajectory simulation based on test data


I realize there are a number of teams who have shared flight path calculators, but this is a little different.

I have a numerically-integrated simulation model written for the flight path of this year's game piece which uses an empirical (test-data based) function (or lookup table) to determine the magnitude of the drag as a function of ball speed, rather than using Fd = ½*ρ*A*Cd*V2.

The model is complete except for that function.

To complete it, I need the empirical (test) data. I think such a simulation, using actual test data for the game piece, would be useful, fun, and educational.

If there are any teams out there who have or would be able and willing to generate such data, I volunteer to analyze it, extract the drag force function from it, incorporate it into the model, and publish the source code and a ready-to-run app that teams can use.

What I need is the air drag force on the (non-spinning) ball over a speed range from about 1 to 6 (is that high enough?) meters/sec. I think I can extract this data by analyzing high-speed time-stamped video taken at an appropriate distance and angle. If anyone has the capability of shooting straight up (vertical shot) that would make extracting the data from the video a lot easier I think.


Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 03:53.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi