Questions tagged [ros]

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

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7
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2answers
346 views

ROS on Raspberry Pi Model 2: UbuntuARM vs ROSBerryPi

Before I ask my question, I'd better confirm that I've read the most prominent post about running ROS on Raspberry Pi devices. That post contains some valuable information, but it's a bit dated, and ...
0
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1answer
455 views

ROS + kinect depth data duplication

I am trying to get depth data from a Kinect in a ROS project. It currently looks like this: To arrive at this, I've done: ...
0
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3answers
236 views

ROS and Kinect data without callbacks

I'd like to get rgb and depth data from a kinect, and I found a little tutorial here: http://wiki.ros.org/cv_bridge/Tutorials/ConvertingBetweenROSImagesAndOpenCVImagesPython. It's fine, but what I'd ...
3
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2answers
2k views

How to use SLAM with simple sensors

What 2D SLAM implementations (preferably included in ROS) can be used with simple distance sensors like IR or ultrasonic rangefinders? I have a small mobile platform equipped with three forward ...
3
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2answers
817 views

Using Gazebo installed on same machine in MATLAB

I am planning to use MATLAB and Gazebo for one of my course projects. However all the tutorials I have seen till now use Gazebo by using a virtual machine which has ROS and Gazebo installed. I have ...
4
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1answer
668 views

ROS MoveIt!, virtual joints, planar joints, prismatic joints

I do have a robotic application, where a 7Dof robot arm is mounted on a omnidirectional mobile platform. My overall goal is to get MoveIt! to calculate a sequence of joint movements, such that the ...
1
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3answers
3k views

How to connect ethernet based Hokuyo scanner?

This is a very basic beginner question, I know, but I am having trouble connecting to the Hokuyo UST-10LX sensor and haven't really found much in terms of helpful documentation online. I tried ...
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2answers
4k views

Determining pose from ar_track_alvar message in ROS

I am using the ar_track_alvar package in Indigo to detect AR Tags and determine their respective poses. I am able to run the tracker successfully as I can visualize the markers in RViz. I give the ...
2
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1answer
107 views

UWSim Pressure Sensor Units

I am attempting to use the data Underwater Simulator (UWSim) provides through the ROS interface to simulate a number of sensors that will be running on a physical aquatic robot. One of the sensors ...
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3answers
889 views

Camera Calibration fails to run on ROS

I am running ROS Indigo on Ubuntu 14.04. I am doing a mono-camera calibration and trying to follow the camera calibration tutorial on the ROS Wiki. I give the following command: rosrun ...
2
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2answers
698 views

Is there a simpler way than ROS for 5 DOF Dynamixel arm control

I will have a 5 or 6 DOF arm build with Dynamixel or HerculeX smart servos. I need to move the gripper along Cartesian trajectory, which I will calculate in my C++ application. I looked at ROS, but ...
-1
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1answer
567 views

How to calculate vehicle detection distance

I would like to know how to calculate the distance to each car when I run my application for an autonomous vehicle in real time. In addition I want to know how implement the calculation in C++. You ...
3
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2answers
588 views

Where to make changes for simulation project Bullet/Gazebo/ROS/Orocos

I am starting to develop robotics project which involves simulation (and maybe real world programs) of soft-body dynamics (for food processing) and clothes/garment handling (for textile industry or ...
6
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1answer
2k views

Implementing a boustrophedon algorithm in a given room with obstacles

I have a mobile robot which is navigating around a room, I already have the map of the room. I am using the navigation_stack of ROS. I am using rotary encoders for odometry. I am fusing the data from ...
1
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2answers
312 views

PTAM CameraCalibrator error

I am trying to run the cameracalibrator.launch using PTAM according to this Camera Calibration tutorial. However, when I do so, I get the following error: ...
3
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2answers
1k views

ROS Calibration Camera Problems

I am trying to calibrate a monocular camera using ROS with the help of this website: How to Calibrate a Monocular Camera. When I run rostopic list, I get: ...
2
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2answers
647 views

Which middleware for IPC and multi-threading in a autonomous robot? [closed]

Aim: To use multi-threading and inter-process communication(IPC) when coding an autonomous robot. Platform: Embedded Linux (Yocto) Constraints : Limited CPU power. We are building an Autonomous ...
6
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1answer
2k views

Is ROS hard real time safe?

I know that is a question that has been asked too many times, but still its not clear to me. I read online that it isn't but some people say that they control their robots under ROS in applications ...
1
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2answers
6k views

Hector SLAM, Matching algorithm

I'm trying to understand the scan-matching part of Hector SLAM (PPT summary). It seems a little difficult to understand, in some cases, how is it possible to actually perform the alignment of the ...
10
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3answers
2k views

Is ROS (Robot Operating System) mandatory?

Do we have to build ROS for robotic research/application? What is the main advantage? When or in which situations ROS is mandatory?
0
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1answer
526 views

Is it possible to use ROS on RPI with controller like MultiWii or similar?

I have a quadcopter using a MultiWii(Arduino Mega) controller. I am curious if there is any way to connect it with ROS capable RPI. (That I could add to the quad itself).
4
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1answer
10k views

How to get a python node in ROS subscribe to multiple topics?

How a ROS node written in Python could subscribe to multiple topics and publish to multiple topics? All examples I found were for a single topic. Is this an event-driven model so subscription to ...
0
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0answers
750 views

Ros, iai_kinect2 issues

here is what I did on Ubuntu 14.04 LTS running on a Toshiba Satellite, intel i7, nvidia with usb 3.0 and 2.0 ports. 1, 2, 3 refer to scripts found here Setup ros by running this install-ros.sh ...
0
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1answer
122 views

Best practice to write a ROS service for a serial-communication class with many options

I have been asked to write code to implement serial communications with a camera in order to control its pedestal (movable base) as well as set a few dozen other camera options. The catch is that I ...
1
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1answer
1k views

How do I control a servo using a beaglebone black running ubuntu

I have a BeagleBoneBlack and would like to use it to control a servo for my robot. I'm mostly programming in ros and as such am looking preferably for a c++ solution. Is there an easy way of ...
0
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1answer
472 views

Mobile Camera Calibration and rectification frame rate

I've been searching the internet for an answer to this question, but I haven't come across anything that will help me. Basically, we have a Meka Humanoid Robot in our lab, which has a shell head in ...
2
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2answers
2k views

ros send message on startup doesn't seem to work

I have the following code: ...
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0answers
309 views

Defining a trajectory for a quadrotor

I' m looking for a trajectory generator (the algorithm doesn't matter, since I m going to write it using C++ ) that generates a trajectory (a parametric curve in space) defined point by point which is ...
0
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1answer
381 views

Control circuit of humanoid robot: is it worth to learn and use ROS? [closed]

I am building the upper body of a humanoid robot for my M.Sc thesis project with 24 DC motors and multiple sensors (something like i-cub or Nao). I have basic knowledge of communication protocols and ...
3
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4answers
4k views

Developing a Quadrotor using ROS [closed]

I suppose who know ROS and how it works (at least most of you) I have some question regarding the implementation of a quadrotor in that framework. 3D movements: A quadrotor has 6DOF and moves in a ...
2
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3answers
202 views

What middle-ware do you recommend for a swarm of AUVs?

Working with a swarm of robots, collaboration between the nodes is really important(either for the goal of simulation or real-word operation). Middle-wares are the frameworks for this special purpose. ...
2
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1answer
333 views

Choosing suitable simulator for a swarm of AUVs [closed]

Which of the following simulators is the best choice for simulating a swarm of AUVs working together to perform a mission? Please clarify your reason and if you know any better choice, I would greatly ...
6
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1answer
4k views

Build a ROS robot with SLAM without laser

I've build a simple wheeled robot based on two continuous servos, controlled by Raspberry Pi running ROS-groovy, with a smart phone mounted on top to provide additional sensors. I'd like to situate ...
0
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1answer
1k views

ros node does not seem to do anything

I have the following code for the ros turtlesim: ...
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0answers
609 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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3answers
620 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
985 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
1
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1answer
72 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
698 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
539 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
447 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 ...
1
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2answers
349 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 ...
1
vote
1answer
744 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
283 views

Robotics StackExchange vs ROS Answer [closed]

Robotics Stackexchange vs. ROS Answer: What is better and for what purpose?
7
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2answers
6k 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?
5
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2answers
961 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
votes
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
487 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 ...