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21 votes
Accepted

ROS: catkin_make vs. catkin build

The main difference is the isolated environment that you get with catkin build. This makes the whole build configuration much more compartmentalized and robust to ...
bergercookie's user avatar
18 votes
Accepted

Is ROS (Robot Operating System) mandatory?

I'm back to a computer! Like I said in this comment, ROS is generally not mandatory. ROS is one platform among many, famous mostly due to Willow Garage giving away free robots at some point in time ...
Shahbaz's user avatar
  • 3,230
12 votes

How to setup CLion for ROS?

Start CLion from a commandline with your sourced ROS workspace (i.e. after calling source devel/setup.bash) Open a project's CMakeLists.txt, and tell it to open it ...
Martin Pecka's user avatar
11 votes

Why do we need ROS?

I think it is safe to say that ROS adds a lot of value to many robotics applications, but it definitely isn't appropriate for every robotics application In fact, the ROS website has a series of pages ...
sempaiscuba's user avatar
  • 1,039
8 votes

Alternative to ROS?

I think you are getting confused between the basic ROS possibilities and some more advanced libraries which are integrated but do not need to be used by users without 'advanced' requirements. If you ...
N. Staub's user avatar
  • 1,402
8 votes

ROS: catkin_make vs. catkin build

Apart from the isolated build, it is much more convenient to use: Independent packages are build in parallel which can make it much faster. catkin build can be ...
luator's user avatar
  • 183
7 votes

Implementing a boustrophedon algorithm in a given room with obstacles

I implemented something like this in College: https://github.com/Auburn-Automow/au_automow_common/tree/master/automow_planning Basically we just passed the vertices of the boustrophedon path as ...
wjwwood's user avatar
  • 298
6 votes

ROS on Raspberry Pi Model 2: UbuntuARM vs ROSBerryPi

The ROSBerryPi page is quite outdated, you actually can install prebuilt ROS Groovy binaries on Raspbian. You will be better off installing prebuilt ROS binaries rather than building from source on ...
hammer's user avatar
  • 106
6 votes

Programming Inverse Kinematics in C++

I agree with SteveO that there is nothing wrong with reinventing the wheel if you want to learn about wheels. And for a single application, 4 DoF arm, the IK is probably not too hard. But I feel ...
Ben's user avatar
  • 5,780
6 votes

How to setup CLion for ROS?

Integrating CLion with ROS is actually straight forward and works out of the box if one knows how to do it: With your console, go into your ROS workspace and source the respective ...
Jarno's user avatar
  • 301
6 votes

Inverse kinematics for differential robot knowing linear and angular velocities

Your linear velocity should be the average of both wheel values. Assuming there's some wheel radius of WHEEL_RADIUS, as you've stated, then you should get each ...
Chuck's user avatar
  • 15.8k
6 votes
Accepted

Robot moving sideways in RVIZ ROS

I have found the problem after some long search on the internet. The problem was that in Rviz, X-axis is defined as front of the robot and Y-axis is defined as the sideways. However, in my URDF I ...
Franky's user avatar
  • 536
6 votes
Accepted

How secure is ROS2?

Rather than trying to explain the nuances of ROS 2 security, I think its better to mention that ROS 2 uses the DDS standard for its security paradigm. If you're working on something important like ...
Steven Macenski's user avatar
5 votes

Is ROS hard real time safe?

ROS is not a real-time operating system. The purpose of ROS was not to be like VXWorx (which is what the Mars Curiosity rover uses). ROS was developed to be a simple, generic, reusable platform for ...
Ryan Loggerythm's user avatar
5 votes
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Create 2 Cable with 700 Series Roomba

Yes, it will work! The electrical interface is the same between the Create 2 and the 700 series Roomba; however, the position of the mini-DIN is changed. Instead of being to the right, under the top ...
Steve's user avatar
  • 952
5 votes

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

I did a little step-by-step tutorial with images, but if my other answer regarding aligning frames didn't work well for you, or the definition of "Front Plane" or "Top Plane" is confusing in ...
Chuck's user avatar
  • 15.8k
5 votes

What are the prerequisites for learning ROS?

It sounds like you're excited to learn ROS. The best way to learn ROS well is to dive in and learn any necessary bits along the way. Once you finish going through EVERYTHING in the ROS tutorials you ...
Jacksonkr's user avatar
  • 295
5 votes
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What is the difference between ROSberry Pi builds?

Well this is embarrassing. I didn't realize they are in fact different distributions not variants. Also found the page where you can find out more about them: http://wiki.ros.org/Distributions
Xavier Guay's user avatar
5 votes
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Programming Inverse Kinematics in C++

It is rather straightforward to implement inverse kinematics for a particular manipulator in C++. Of course, you need to begin with the inverse kinematic equations themselves. Putting those into ...
SteveO's user avatar
  • 4,376
5 votes

rostopic list not showing topic

In which order do you run your commands ? rostopic list is used to list current topics registered with the rosmaster 'node', ...
lmathieu's user avatar
5 votes
Accepted

Is ROS still maintained are any other trendy alternatives?

ROS Melodic supports 18.04, the current LTS-version of Ubuntu, so it's perfectly up to date. ROS has a huge active community in Academia and(!) Industry (ROSIndustrial), many robotic companies use ...
FooTheBar's user avatar
  • 1,355
5 votes
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roslaunch not found

Even though you have added source /opt/ros/kinetic/setup.bash to your .bashrc, the fact you get a "command not found" error ...
xperroni's user avatar
  • 1,296
5 votes
Accepted

What is the Point of Monocular SLAM

I would say true scale actually doesn't really matter. A good way to reason about this is actually video games. If you play a racing game(or really any kind of 3D game) do you care that the world has ...
edwinem's user avatar
  • 1,721
5 votes
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Is using a robotic operating system still considered bare-metal C?

Bare metal programming is defined by not using any abstractions that might be provided by an OS and working directly with the hardware. Wikipedia Technopedia. ROS provides an even higher level ...
Tully's user avatar
  • 1,767
5 votes
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cartesian velocity control loop implementation

The orientation error is not simply subtraction of your current pose and the desired pose. Given $\mathbf{R}_{a}, \ \mathbf{R}_{d} \in \text{SO}(3) $, where $\mathbf{R}_{d}$ is your desired ...
domo_arigato's user avatar
4 votes

Hector SLAM, Matching algorithm

Imagine someone put you in a wheelchair and blindfolded you, then let you reach your arm out and touch a wall. You could tell how far away the wall was, but as long as you were pushed parallel to the ...
Chuck's user avatar
  • 15.8k
4 votes
Accepted

Using Gazebo installed on same machine in MATLAB

The MATLAB tutorial doesnt cover this aspect well about when you have matlab and gazebo running on the same linux machine with no virtual box. Change your linux ethernet interface ip address ...
Themarkofaspur's user avatar
4 votes

How to use SLAM with simple sensors

The actual implementation of SLAM won't care about whether you are using high fidelity laser range finders or cheaper ultrasonic sensors. Both are providing range measurements with the biggest ...
Brian Lynch's user avatar
  • 1,377
4 votes
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Suggestion for relevant non-complex simulator

just use matlab or and python with a set of fixed features in space represented as points. Don't do any vision processing. At this point any vision processing would be overkill. you are making this ...
holmeski's user avatar
  • 1,833
4 votes
Accepted

Integrating GPS into Graph SLAM (how orientation fixed?)

You can use a very low information matrix value at the orientation elements of your state, given that the information matrix is the inverse of the covariance matrix. The covariance matrix ...
Ricardo Achilles's user avatar

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