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Questions tagged [ros]

ROS (Robot Operating System) is a free, open-source robot software framework developed by Willow Garage.

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0answers
545 views

Acceleration formula for a differential steering robot

I have the formulas to derive the RPM's of each wheel from the robot's linear velocity. Now, I am trying to do the same thing for the acceleration (mainly angular acceleration). For linear ...
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2answers
599 views

Can't Read current on Pololu Dual MC33926 Motor Driver Shield for Arduino

I purchased a Pololu Dual MC33926 Motor Driver Shield for Arduino, and for some reason I cannot read current from the motor controller. On the Serial.println() it just prints weird data (garbage), and ...
0
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2answers
914 views

12V Arduino Dual Bridge to supply at least 5A [closed]

I am looking for a 12V Dual Motor Controller that can supply at least 5A per channel for two 12V motors, and that can be used with an arduino. Do you know of any product with those specs? Thanks
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1answer
71 views

Robot Loud Alarm

We are working on a project where we want to sound an alarm if somebody is messing around with our Robot (e.g., the Robot is being shaken abruptly or the cameras/LIDARs are blocked). I am using "loud ...
2
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1answer
611 views

ROS NavStack with Skid Steering robots

I am migrating from a differential drive design to a skid steering design for my robot, and I want to know how easy would it be to use the NavStack with skid steering. Would there be any problems in ...
3
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2answers
481 views

IMU based acceleration parameters for differential drive robot

I have a differential drive robot whose motors are virtually quiet while driving on a completely flat surface, but the motors make a lot of noise when on a incline. This is likely due to the ...
1
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2answers
404 views

Cannot launch iRobot Create. Powers down upon minimal launch?

I just got an iRobot iCreate base and I've followed the instructions given in ROS Tutorials to setup the turtlebot pc and the workstation. I could successfully ssh into username@turtlebot through ...
14
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1answer
2k views

ROS: Best practices?

I'm going to build a small robot system, and it seems like that ROS serves a nice framework to control and program the system. However, I am wondering which is the best practice to manage the ...
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2answers
346 views

How can I achieve long distance, high quality 3D Scans on a mobile robot?

Am going to be competing in Robocup Rescue in Thailand next year - I was too busy to pull off a campaign for Brazil this year :( Will be using CUDA powered GPUs, Kinect/Xtions, and ROS as the primary ...
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1answer
731 views

Why does iRobot not sell the Create in Europe? [closed]

I'm trying to find a good beginners platform to use ROS with, and I came across the iRobot Create. To my surprise, they do not sell in Europe. Why is that?
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1answer
269 views

Robotics StackExchange vs ROS Answer [closed]

Robotics Stackexchange vs. ROS Answer: What is better and for what purpose?
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2answers
5k views

Why is ROS not a real-time operating system?

ROS is not real-time OS. After reading the architecture of ROS, I am unable to realize why is ROS not real-time? What part of the architecture or what design decision is causing that?
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2answers
952 views

Udoo board + Kinect sensor?

I am wondering if it would be possible to get Kinect to work with Udoo board (Quad). I have found that there is now support for ROS + Udoo. Also saw a question asked about Xtion + Udoo which shows ...
3
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2answers
3k views

Visualizing kinect data on rviz

I am a beginner of ROS, Kinect and Ubuntu. What I want is to visualize Kinect's data on rviz environment then run object recognition on it. I've tried a few tutorials but had no luck. All I got was ...
9
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2answers
1k views

Extended Kalman Filter with Laser Scan + Known Map

I am currently working on a project for school where I need to implement an extended Kalman Filter for a point robot with a laser scanner. The Robot can rotate with 0 degree turn radius and drive ...
3
votes
1answer
462 views

Move ATRV robot to specific distance using ROS

Is there a node or package that can send commands to /cmd_vel to move ATRV-Jr like 2 meters forward or turn it 90 degree to right/left? I don't want to tell the ...
3
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2answers
903 views

Fake localization using bag file in ROS

I have a bag file that contains couple of topics needed for localization, odometry data, kinect data and /tf. What I want is watching robot's movement path in ...
4
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1answer
2k views

Particle filter implementation in ROS

I'm looking for particle filter implementation in ROS to use in mobile robot localization, but it seems the only available package is amcl (Adaptive Monte Carlo), I'm not sure is it possible to use it ...
3
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1answer
2k views

Calculate covariance matrix from x,y,z data

In ROS I've recorded a bag file from a custom robot (in real world) that does not provide covariance matrix and I want to use /odom to feed an EKF, but covariance ...
4
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1answer
2k views

ROS AMCL does not need odometry data?

I'm reading amcl document on ROS Wiki. In its subscribed topics there is not odometry topic, why? It works only with laser? Subscribed Topics: (From ROS Wiki) scan (sensor_msgs/LaserScan) tf (tf/...
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0answers
227 views

running UWSim commands in ROS

Where can I find a good documentation about the UWSim in ROS. Actually having the source files is not enough and it is actually hard to follow all the functions. for example, how can I use these ...
5
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1answer
1k views

How can I get data from my kinect?

Whenever I try using openni_launch, it works normally, however, when I try viewing an image using the kinect's rgb or depth camera, or even recording a simple ...
1
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1answer
554 views

Roslaunch include file remotely

I am trying to launch a file from remote computer but I could not success. Actually I can connect to remote computer but I think the problem is with including a file from remote computer. In other ...
2
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1answer
92 views

Light pattern is flashing intermittently using RVIZ/OpenNI with two Kinects

I have two Kinects (each on its own USB card) whose cameras I'm watching in RVIZ through OpenNI, and the structured light pattern of one is flashing intermittently - it's only there for a short flash ...
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2answers
748 views

qt ros tutorial issue

I am working on a robotic application under R.O.S. groovy Galapagos. I would like to make a tutorial about how create a template app with catkin_create_qt_pkg. I'm unable to call the script ...
3
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2answers
2k views

What is the easiest way to install ROS on OSX Mountain Lion?

The latest OSX documentation I found on the website is from 2011, and the latest build is from over a year ago. I'm a complete n00b to all things ROS and wanted to start playing with it. What is the ...
3
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2answers
4k views

Cant see Kinect Data in ROS

I am working on this project that involves using the Kinect for XBOX 360S with ROS. I did all the steps mentioned in the ROS Tutorials to have Openni Installed and the Prime sense and other drivers. ...
6
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1answer
602 views

Simulated kinect rotation around X [gazebo bug?]

I asked this question on answers.ros.org and gazebo.ros.org but still haven't got any answer. I'm posting my question here with the hope someone can help me. In our robot, the Kinect can be mounted ...
8
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1answer
853 views

Dropping PWM on Ardrone Parrot 2.0

I am having some issues with the ARDrone Parrot 2.0 and hope someone else may be running into the same thing. While hovering, the drone is (seemingly) randomly losing altitude then recovering . It is ...
1
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1answer
190 views

Storing Kinect Data on a USB Drive

Does anybody know if Kinect Data can be stored directly onto a USB Drive?? I have a Kinect for Windows that i cannot use on Linux(ROS). However what i plan is to mount the Kinect on my robot, store ...
1
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1answer
88 views

Plans to use Vendor ID to identify EtherCAT devices?

I also asked this question on ROS Answers, but it's not getting much interest there. Currently the EtherCAT package in ROS uses the slaves' Product IDs to identify the devices, and load the correct ...
3
votes
2answers
894 views

Would ROS benefit from a multicore processor like Epiphany or XMOS?

I am looking for a good embedded PC to run ROS on. I recently came across a couple of little machines using new very multi-core processors, such as the Epiphany and the XMOS. Since the one thing that ...
9
votes
2answers
2k views

Can I use ROS with a Roomba?

Is there anything different between a iRobot Roomba and the Create? I want go start building my own turtlebot and playing with ROS but with the cost of all the parts I'm going to have to do it piece ...
5
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1answer
194 views

Is it possible to use Matlab “system” function to call ROS commands?

Is it possible to use the Matlab's system function to call ROS commands? For example, using ...
4
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1answer
155 views

IPC-Bridge problem

Is anyone able to help me out getting IPC-bridge working on my ubuntu lucid installation (with matlab 2012a)? I'm not being able to finish the last step on here (Compiling the messages folders): https:...
28
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11answers
12k views

Can ROS run on a Raspberry Pi?

Can ROS run on a Raspberry Pi? ROS is resigned to run on a network of machines, with different machines, even different cores on the same machine doing different jobs. Can one of those machines be a ...
8
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2answers
516 views

Red [ERROR] output in python in ROS

In ROS, I cannot get [ERROR] logs to print in red when I use python. How can I make them appear in red instead of black? For example, the following Python: ...
16
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2answers
5k views

How to choose a good IMU for a wheeled robot?

At our lab, we have a several "Kurt" type robots (about the size of a Pioneer, six wheels, differential drive). The built-in gyroscopes are by now really outdated; the main problem is that the ...