OCCRA
Go to Post I'd like to think FIRST hasn't completely transformed into a money hungry self serving corporation. I'd like to think they actually still think they care about us. - Koko Ed [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #31   Spotlight this post!  
Unread 08-27-2018, 01:51 PM
Andrew Schreiber Andrew Schreiber is offline
Petitioning the UN to ban Lythgoe
no team
Team Role: Engineer
 
Join Date: Jan 2005
Rookie Year: 2000
Location: Somehow, the entire east coast...
Posts: 4,946
Andrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond reputeAndrew Schreiber has a reputation beyond repute
Re: pic: Pseudo-Differential Swerve

Quote:
Originally Posted by AriMB View Post
It's not just after a collision though. Anything that would cause one wheel to slip and not the other would cause the same problem, even if the wheel isn't completely raised off the ground. This could happen in autonomous by driving over a small bump* or a slippery/sticky piece of field tape**, for example. If the wheel that's slipping is the one you're measuring, you may know that the wheel slipped (because the module turned unexpectedly), but you don't know how much distance you lost from slipping.


* flat fields often have unexpected 1/4" bumps (see 2017)
** FTAs do their best to keep all the tape lines intact and smooth, but you know as well as I that they get messed up by the end of a long competition
Understood. As I've said I'd likely do a 3 sensor approach at the minimum. But I think the Internally Indexed Differential Swerve would be less susceptible to the error being described.
__________________




.
Reply With Quote
  #32   Spotlight this post!  
Unread 08-27-2018, 02:02 PM
AriMB's Avatar
AriMB AriMB is online now
The Philadelphian emigrant
AKA: Ari Meles-Braverman
FRC #5987 (Galaxia)
Team Role: Mentor
 
Join Date: Mar 2015
Rookie Year: 2012
Location: Haifa, Israel
Posts: 1,812
AriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond reputeAriMB has a reputation beyond repute
Re: pic: Pseudo-Differential Swerve

Quote:
Originally Posted by Andrew Schreiber View Post
Understood. As I've said I'd likely do a 3 sensor approach at the minimum. But I think the Internally Indexed Differential Swerve would be less susceptible to the error being described.
Agree all around
__________________
Studying MechE at the Technion - Israel Institute of Technology
2017-present: FIRST Israel CSA/FTAA
2017-present: FRC 5987 Technical Mentor 18isr2 18isr4 18isrcmp 18carv
2012-2016: FRC 423 Member 15njtab 15padre 16paphi
Reply With Quote
Reply


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 06:24 AM.

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


Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi