Questions tagged [errors]

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ros2 on qnx # error unknown multiarch location for pyconfig.h

while building ros2 on qnx, i am getting the below error: ...
Syed Afroz's user avatar
0 votes
2 answers
100 views

Trying to install ROS2 on Ubuntu Jammy, but I'm running into some errors

I have ran into an error whilst trying to install ROS2, not sure what to do. Some background: I'm running ubuntu version 22.04.3 using a virtual machine. I'm trying to install ROS 2 Iron (...
Error100's user avatar
0 votes
0 answers
41 views

MoveIt2 problem to install moveit_configs_utils package during binary downloading

I'm attempting to install MoveIt2 binary on the ROS2 Humble platform, but I'm having trouble installing the moveit_configs_utils package. Before that, I tried to install MoveitIt2 from the source ...
Tomáš Karel's user avatar
0 votes
0 answers
41 views

Gazebo installation problem on Windows

I'm trying to install Gazebo on Windows 10 following these steps: https://gazebosim.org/docs/harmonic/install_windows_src I have completed all the steps in the "Install dependencies" section ...
George Karafotias's user avatar
0 votes
1 answer
44 views

display.launch.py --share on ROS 2 tutorials is not working - Windows 11

I have installed ROS 2 (Humble Hawksbill) on windows 11 and trying to follow URDF tutorial. When I run the folllwing command: ...
Ros wizard's user avatar
0 votes
1 answer
120 views

fatal error: rclcpp/rclcpp.hpp: No such file or directory

I already build some others packages without errors, but now i'm trying to build a library now and i have this error: fatal error: rclcpp/rclcpp.hpp: No such file or directory 10 | #include "...
Donca's user avatar
  • 11
0 votes
2 answers
166 views

cannot launch node of type [gmapping/slam_gmapping]: Cannot locate node of type [slam_gmapping] in package [gmapping]

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kostas T's user avatar
1 vote
1 answer
43 views

{spawn_model-5} process has died

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keke kurwa's user avatar
0 votes
1 answer
119 views

Gazebo-Garden : [GUI] [Err] [VisualizeLidar.cc:251] Lidar pointer is not set

When running gz-sim/examples/worlds/visualize_lidar.sdf (link), I get an error message ...
TanguyTheOtter's user avatar
-1 votes
1 answer
42 views

Value Error: module PIL Image is not a class [duplicate]

This is the node I've written in rospy. It opens a socket connection and then converts the received image to < ndarray > and then < sensormsg.Image > and publishes it ...
SM5's user avatar
  • 9
0 votes
0 answers
71 views

How to fix ValueError: module PIL Image is not a class?

This is the node I've written in rospy. It opens a socket connection and then converts the received image to < ndarray > and then < sensormsg.Image > and publishes it ...
SM5's user avatar
  • 9
0 votes
1 answer
184 views

catkin_make not creating a catkin workspace for ROS through Robostack (Conda) environment

I've recently been encountering an issue when trying to create a working catkin workspace for ROS through RoboStack. Robostack is utilized to create a working ROS environment installed in Conda. When ...
omar7439's user avatar
0 votes
1 answer
196 views

colcon build exception

I am getting this error when using the colcon build command. I don't know how this occurred and everything was working really fine. ...
Jishnu's user avatar
  • 81
3 votes
4 answers
1k views

SetuptoolsDeprecationWarning in ros2 Humble

I was trying to follow this tutorial in the official documentation of ros2 Humble for Integrating launch files into ROS 2 packages and ran in to the below given error after doing trying to perform a ...
Jishnu's user avatar
  • 81
2 votes
3 answers
1k views

VS Code C/C++ extension Issue with ros program header file

Recently, when I was trying to compile a ROS programm written in C++ (with C/C++ extension installed in VSCode) I ran in to a problem with the header files included in the program (...
Jishnu's user avatar
  • 81
1 vote
0 answers
96 views

PID controller error calculation when the setpoint and the process variable both grow over time

Suppose I have a robot which can perform some work and be rewarded with a point 50-70% of the time. I want a different number of points to be collected every hour of the day. This is modelled using a ...
Lee A.'s user avatar
  • 11
2 votes
3 answers
789 views

Spdlog linker error with ROS2 packages

Good afternoon! We are a company that has a pretty big robotic framework and we are currently working in a transition into ROS2. We are first creating the structure that all of our packages will ...
Jorge Playán's user avatar
1 vote
2 answers
575 views

roslaunch exit code 2 error

I am implementing a simple roslaunch file but I am getting an exit code 2 status I have pasted the exact log below any idea what would cause this and how I can rectify it. ...
NOVA1323's user avatar
0 votes
1 answer
195 views

Unable to figure out the source for the bad_alloc error

I am getting a bad_alloc error when I try to use the costmap_2d::Costmap2DROS::getRobotPose function inside the ...
skpro19's user avatar
  • 314
1 vote
1 answer
283 views

Caculate/Specify the covariance matrix for a omniwheel robot

I have an omnidirectional robot (x, y and rotation around z), which I would like to use the SLAM-algorithm from ROS. But the odometry from the robot has a drift, which makes some error. To improve the ...
Marki2112's user avatar
0 votes
2 answers
2k views

/odom topics not matching ERROR

I have an existing ROS workspace which was built in C++. I am trying to implement a node built by The Construct in python which reads distance travelled from the ...
neerbasu's user avatar
4 votes
2 answers
436 views

Calculating Error of Arm Manipulator

How can we calculate the error position of arm manipulator? Let's say we have a Transformation Matrix: $$\begin{bmatrix} R_{00} & R_{01} & R_{02} & x\\ R_{10} & R_{11} & R_{12} &...
Michael Iskandar's user avatar
2 votes
1 answer
55 views

How does structural/installation errors have to be modelled in a gyroscope IMU?

I have the model for a gyroscope from an IMU given by $$ \omega_{meas} = (I-S)\omega_{true} + \beta + v $$ $S$ is the scaling and misalignment of the sensor, which I understand is a parameter I get ...
Luis's user avatar
  • 163
0 votes
1 answer
68 views

State of the art trajectory for fine precision robots

Which kind of trajectory would one use for a fine precision robot? I know trapezoidal and cubic trajectories, but errors get very high when stopping at every configuration and when speeding up to ...
kassio's user avatar
  • 35
2 votes
1 answer
2k views

Process noise and Measurement noise in Kalman filter

I am doing the robot localisation project. Now I stuck on the effect of measurement and process noise in Kalman filtering. Could you please explain what impacts they have while estimating the position ...
Nekromant's user avatar
6 votes
3 answers
8k views

Camera selection for long range stereo vision system (up to 100 meters)

I want to implement a real-time stereo vision system for long range (up to 100m) depth estimation. I know that there are some general considerations as described in this SOV post. I have seen some ...
Mr. Nobody's user avatar
3 votes
0 answers
747 views

real-time stereo vision system for long range (up to 100m) depth estimation

I want to implement a FPGA-based real-time stereo vision system for long range (up to 100m) depth estimation. Also, I want to use two ip cameras in the system. I have calculated depth error using the ...
Mr. Nobody's user avatar
1 vote
1 answer
447 views

Illegal position data with Mitsubishi Melfa RV-2F-Q robotic arm

I have a project where I have to move a Mitsubishi Melfa RV-2F-Q robot to a position/orientation from an external source, so there are no pre-defined points available. The problem I keep running into ...
icguy's user avatar
  • 111
0 votes
2 answers
154 views

Is there any error analysis of Irobot Create 2?

I am curious about the travelling distance/turning angle accuracy of Irobot Create 2. E.g., if the program let Create 2 go forward for 10 m, will Create 2 go forward exactly 10 m? What is the ...
Yubing's user avatar
  • 1
1 vote
1 answer
1k views

How to compute the error function in graph SLAM for 3D poses?

Given a pose $x_i = (t_i, q_i)$ with translation vector $t_i$ and rotation quaternion $q_i$ and a transform between poses $x_i$ and $x_j$ as $z_{ij} = (t_{ij}, q_{ij})$ I want to compute the error ...
morph's user avatar
  • 197
11 votes
1 answer
4k views

Ambiguous definition of Error-State (Indirect) Kalman Filter

I am confused by what precisely the term "Indirect Kalman Filter" or "Error-State Kalman Filter" means. The most plausible definition I found is in Maybeck's book [1]: As the name indicates, in ...
sebsch's user avatar
  • 649
4 votes
2 answers
2k views

the uncertainty of initializing new landmark in EKF-SLAM

In EKF-SLAM (based-feature map) once the robot senses a new landmark, it is augmented to state vector. As a result, the size of the state vector and the covariance matrix are expanded. My question is ...
CroCo's user avatar
  • 2,453
3 votes
1 answer
315 views

Dynamic tracking precision of UR5/10

I am willing to use a universal robot arm (UR10) in a path following mode. i.e. I have a desired trajectory for the robot's effector and I would like the effector to follow it as close as possible. ...
arennuit's user avatar
  • 609
2 votes
3 answers
263 views

Gears in Autodesk Inventor are looking weird

I use Autodesk inventor professional 2014. I design my gears using the design accelerator. However, whenever I create gear trains, parts of certain gears become transparent. This seems completely ...
Sonarbuddy's user avatar
5 votes
2 answers
3k views

Accelerometer calibration - how to get cross-axis sensitivities

I've already asked a related question (accelerometer bias removal) here on robotics and got a bit better results on corrected accelerometer output. To get even better results I found the calibration ...
c0dehunter's user avatar
3 votes
2 answers
4k views

Accelerometer bias removal

I found a good explanation on how to remove accelerometer bias (when on flat table only one axis should show values, the other two should be 0). I've calculated S and B factors (page 3): Record $...
c0dehunter's user avatar
-2 votes
2 answers
350 views

What are some common mistakes that robots make? [closed]

Is there a taxonomy of errors that are common in robotics? Things that come to mind but I don't have names for are: Getting stuck in a stable infinite loop Going into an unstable feedback loop (A ...
Ian Danforth's user avatar
24 votes
4 answers
19k views

How should emergency stops be wired?

Emergency stops are obviously a good idea on most robots, how should they be wired? What systems should be killed immediately, and what should stay working?
Felix's user avatar
  • 1,307