Information

ArduRover User Group

Dedicated to the exchange of useful information between members using the Arduino or other families of processors for autonomous rovers.

Members: 464
Latest Activity: 6 hours ago

Before Posting an Issue

Hi All,

Before posting an issue or a problem in the ArduRover Discussion Forum, please check the wiki table of contents, review the firmware release notes in the subforum, and search that subforum for existing answers to your question. Help avoid duplicate threads by finding other members with the same issue and their solution.

When formulating your post, use a descriptive title such as "rover will not navigate to waypoints in the Auto mode" (not "HELP!" or "Problem").

Please include the following information to help diagnose your query:

  • Describe the problem you are having. What is the expected verses the observed behavior?
  • Provide hardware information such as the brand and version of your autopilot, GPS, radio, and compass, as well as any other pertinent details about your rover setup.
  • What version of the APM: ArdurRover2 firmware version are you running?
  • For navigation issues, provide your tlog and/or dataflash log. Click here for instructions on retrieving a dataflash log.

TCIII

Discussion Forum

Apm Rover in tractor setup.

Started by Matthew Reimer. Last reply by Grant Morphett 6 hours ago. 141 Replies

I want to use pixhawk with the apm rover firmware to operate an agricultural tractor. I need to set up my tractor as an rc vehicle.  My plan is as follows: any feedback I can get is appreciated.  I…Continue

RoverWarning _No Brakes! A throttle nudge story.

Started by dr0n3droid. Last reply by dr0n3droid 7 hours ago. 4 Replies

While testing my rover recently, I had one of the most counterintuitive experiences in my decade long rc career with catastrophic results.In AUTO, I was tweaking cruise speed while running a looped…Continue

Rover Hold/Delay At Waypoint

Started by tjfhlv. Last reply by Grant Morphett on Friday. 12 Replies

I'm currently testing a rover setup that I need to have go to a waypoint, hold position at that waypoint for a period of time, then simply continue on it's mission. I have looked through this group,…Continue

Help with Pixhawk and TRex dual motor controller

Started by Steven Cohen. Last reply by Steven Cohen on Thursday. 11 Replies

I'm a technology instructor at a new Applied Tech HS setting up a long term rover project and working out the kinks over the summer. I will ultimately be using the Dagu wild thumper and a sabretooth…Continue

Comment Wall

Comment

You need to be a member of ArduRover User Group to add comments!

Comment by RoboBill on March 20, 2014 at 6:11am

Please... a simple question

Is the do_set_servo command currently available for the rover?

Comment by MikeRover on March 17, 2014 at 5:31pm

I have to say the current navigation repeatability is excellent.  I hit the fence the second time within about nine inches of the first impact point :)


Admin
Comment by Thomas J Coyle III on March 17, 2014 at 4:40am

@Michael,

I believe that the Mission Planner has a SITL. There is a tab in the Mission Planner for "Simulation".

The next release of the ArduRover2 firmware will probably be for the Pixhawk and will allow the use of a 2nd GPS which the Pixhawk is capable of doing compared to the APM which is limited to one GPS.

The team will also continue to improve the navigation capabilities of the L1 code to improve turning in corners and course repeatability.

Regards,

TCIII ArduRover2 Developer

Comment by MikeRover on March 16, 2014 at 7:59pm

Any ideas on when the nex Rover build will be released?

Also, is there a way to run a mission in software?  I'm playing with waypoints and trying to understand some of the steering / navigation parameters and it would be handy to see what a "perfect" mission would look like based on my settings.

The complication is that the nav parameters are a function of the L1/steering settings as well as speed, so you can't even "work up" to a full speed mission as the path will change.

Comment by RoboBill on March 13, 2014 at 1:19pm

Since I'm real new to all this, it may just be my imagination, but I dl'd the latest Pixhawk f/w and the pivot turning seems to be working better.. i.e. completed a 180 turn.

Comment by Antonie Kruger on March 12, 2014 at 8:50am

@Thomas,

That makes sense. Are there so many GPS issues to justify a second system for momentary failures or is it more for complete failure of one system in the airborne vehicles.

This is an interesting subject since I've been working on multiple IMU use for another project on NETMF. This is primarily for averaged readings on multiple sensors, but to act as a redundant backup should one fail or show signs of bad health. Please keep us posted on your findings and thanks for all the hard work.

Thanks,

Antonie 


Admin
Comment by Thomas J Coyle III on March 12, 2014 at 8:35am

@Antonie,

The second GPS is for redundancy when the other GPS momentarily hiccups and most likely for an averaged instantaneous position. The Sparkfun AVC rules presently do not allow a local base transmitting a correction signal.

Regards,

TCIII ArduRover2 Developer 

Comment by Antonie Kruger on March 12, 2014 at 8:21am

@RoboBill&&Thomas,

At risk of sounding brutal, I do not think this can be called a poor man's RTK. The receivers we use are L1 only. For a RTK solution you would require a L1&L2 +++ receiver with a fixed(normally) base transmitting a correction.

Regarding the 2 GPS's. I would not use the 2 GPS's to derive a baseline length or distance. We've tested RTK systems(<0.02m 2D accuracy) on drilling rigs for guidance. Looking at the 20mm accuracy - of one is 20mm left and the other 20mm right you have a 40mm displacement over a short base - in simple terms. Now imagine using L1 only with a 2m accuracy.

If only ublox would release that L1&L2 receiver they're hiding in the R&D department.

Antonie

Comment by RoboBill on March 12, 2014 at 7:48am

Regarding having two GPS' on a rover....Thank You! 

1) Will this be sort of a poor man's RTK?

2) Do you think you can reach to less than 12 inch relative accuracy?

3) I assume there will be a distance between GPS' parameter. Please consider the possibility of mounting the GPS' both in line with rover and also on the sides. In my case that distance will be close to 3 feet. 

3) If you'd like, I'd be happy to help test your code.


Admin
Comment by Thomas J Coyle III on March 11, 2014 at 3:00pm

Hi All,

I would like to announce that Tridge and I are presently testing the use of two GPSs on a Pixhawk equipped rover. We are in the process of collecting data from both GPSs to assess the effectiveness of using two GPSs and to prepare for generating code that can take advantage of using two GPSs.

Regards,

TCIII ArduRover2 Developer

 
 
 

© 2015   Created by Chris Anderson.

Badges  |  Report an Issue  |  Terms of Service