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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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810 views

Build a simple robot to learn ROS [closed]

I am a beginner to ROS and I wanted to know if I could build a simple robot to learn ROS. I currently have the following components available: Arduino Uno Simple two wheeled robot chassis Some ...
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1answer
5k views

E: Unable to locate package ros-jade-desktop-full

I want to install ROS on my Xubuntu 16.04, Xenial Xerus. I have followed the ROS's site instruction: http://wiki.ros.org/jade/Installation/Ubuntu, and did the following: First, setup my sources.list: ...
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1answer
8k views

Getting “rospack package not found error” in ROS

I created a package in catkin workspace and put a publisher.py node inside the src directory of package which worked fine. Then i added another node subscriber.py node and used catkin_make to build. ...
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1answer
467 views

Downgrade ROS from Jade to Indigo

Is it possible to downgrade from ROS Jade to Indigo? For those who are not yet familiar with Robot Operating System (ROS), here: ROS
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0answers
128 views

Waiting for the r_gripper_sensor_controller/gripper_action action server to come up

I started to use ROS hydro (Robot Operating System) and roscpp. I tested some examples to move the gripper of pr2 in Gazebo (especially the code in : http://wiki.ros.org/pr2_gripper_sensor_action/...
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0answers
62 views

Topics of object perception for pr2 [closed]

I started to use ROS hydro (Robot Operating System) on ubuntu, using the simulator "Gazebo" and roscpp library, in order to program some robots. In case of pick up and place known objects by robots, ...
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1answer
413 views

How difficult it is to build simple robots (for example Line follower) using raspberry pi and ROS? [closed]

I want to build a low cost robot, running ROS for educational purposes. It can be a simple line follower using raspberry pi and an IR sensor. Is it overambitious as a beginner project? How difficult ...
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2answers
1k views

ROS tutorials no longer working

Has anyone ever run into a case where a fresh install of ROS cannot run its tutorial packages? I am running ROS Indigo on an nVidia Jetson TK1, using the nVidia-supplied Ubuntu image. I just did a ...
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1answer
1k views

How to align solidworks global origin with assembly origin while exporting in solidworks to urdf

I have created a robot model in solidworks and exported in solidworks to urdf plug-in. When exporting the co-ordinates of the model is misaligned which is causing problem while using in ROS. As you ...
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3answers
505 views

Software real-time of ROS system

As far as I know, a hardware real-time robot control system requires a specific computing unit to solve the kinematics and dynamics of a robot such as interval zero RTX, which assigns CPU cores ...
4
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1answer
290 views

Create 2 Cable with 700 Series Roomba

For the last few months I have been playing with ROS on an nVidia Jetson TK1 development board. Up until this point, it has mostly been playing with the GPIO header, an Arduino Uno, a couple physical ...
3
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1answer
117 views

How to estimate the position of multiple static ground targets captured from a down facing camera?

An aerial vehicle captures images of the ground using its down facing camera. From the images, multiple targets are converted from their pixel position to the camera reference frame using the pinhole ...
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1answer
250 views

Is AllJoyn a good ROS alternative regarding message passing cross multiple devices?

I've used ROS for a while, my environment is Raspberry Pi + Ubuntu + OpenCV + ROS + C/C++. I also use several ROS packages (tf2, usb_camera, slam related, and laser scanner capture.) Also, in my ...
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0answers
580 views

Gazebo laser plug-in fails to publish scan results

I have added hokuyo laser plug-in to mu urdf file. I successfully launched the robot in gazebo and done required changes to visualize it in rviz. I didn't get any error but the laser scan results are ...
2
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1answer
650 views

Tf frame origin is offset from the actual base_link

I have built my differential drive mobile robot in solidworks and converted that to URDF file using soliworks2urdf converter. I successfully launched and robot and simulated with tele-operation node. ...
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2answers
4k views

How to convert rotation matrix in to equivalent Quaternion using Eigen Library.

Eigen library (http://goo.gl/cV5LY), which is used extensively in ROS and PCL. Thank you.
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1answer
315 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 ...
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1answer
425 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: ...
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3answers
213 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
784 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 ...
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0answers
608 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 ...
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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 ...
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1answer
104 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
840 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 ...
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2answers
678 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 ...
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1answer
536 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 ...
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2answers
566 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 ...
4
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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 ...
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2answers
301 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: ...
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2answers
943 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: ...
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2answers
599 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 ...
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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 ...
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2answers
5k 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 ...
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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?
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1answer
520 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).
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1answer
9k 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 ...
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0answers
733 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 ...
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1answer
116 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 ...
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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 ...
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1answer
463 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 ...
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2answers
1k views

ros send message on startup doesn't seem to work

I have the following code: ...
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0answers
301 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 ...
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1answer
377 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 ...
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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 ...
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3answers
199 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. ...
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1answer
328 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 ...
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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 ...
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1answer
1k views

ros node does not seem to do anything

I have the following code for the ros turtlesim: ...