15-02-2012, 09:23
|
 |
Alumni turned Mentor
AKA: Branden Gunn
 FRC #4761 Team Role: Mentor
|
|
Join Date: Jan 2007
Rookie Year: 1996
Location: Reading, MA
Posts: 868
|
|
|
Re: Trajectory Calculator (W/ Drag)
Quote:
Originally Posted by Bendito
Now, the real question is, how do we have this trajectory calculator solve for angle if the velocity is constant?
|
That part is really tricky. What I did in my calc (which does not do drag!) was to have it iterate the angle until the calculated path went through the target basket. I did this using Excel's goalseek function. Then you make a table of different ranges to shoot from, and graph it. Add a trendline to generate an approximate formula for that velocity (I used Order 3 polynomial to get a high R^2 value). That simplified formula is what you would integrate with your robot code if you wanted to automate the angle.
__________________
Student FRC23 (1996-1999), Mentor FRC246 (2000), Mentor FRC1318 (2007-2009), Mentor FRC93 (2011), Mentor FRC2151 (2012), Mentor FRC23 (2013), Mentor FRC4761 (2014-2017)
1998 - National Chairman's Award and Woodie Flowers Award (FRC23, Mike Bastoni  ) | 2007 - PNW SF (488, 1595) | 2008 - Oregon RCA - Seattle #2 Seed, SF (488, 1696) | 2009 - Oregon #1 Seed, Winners (1983, 2635) - Seattle SF (945, 2865) - Galileo #2 Seed, SF (973, 25) | 2012 Midwest F (111, 71) | 2014 RIDE Winners (78, 125), Inspector - NEU #24, QF (3479, 3958) - NECMP #35 | 2015 Reading #11, SF (1058, 190), Inspector - RIDE #17, QF(4055, 5494), Inspector - NECMP #57 | 2016 Reading #4, SF (133, 4474), DCA, Inspector - Ride #22, SF (1735, 2067), Creativity, Inspector - NECMP #48, RCA - Archimedes
|
I pumped my fist to cheer - but since I was a ref at the time it looked like I signaled a red foul... - Tom Ore [more] 
Threaded Mode