Questions tagged [errors]
The errors tag has no usage guidance.
27
questions
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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 ...
- 11
0
votes
1
answer
72
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.
...
- 49
1
vote
2
answers
440
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 ...
- 49
1
vote
1
answer
663
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 (...
- 49
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0
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63
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 ...
- 11
1
vote
3
answers
306
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 ...
- 21
1
vote
2
answers
414
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.
...
- 21
0
votes
1
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133
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 ...
- 195
1
vote
1
answer
242
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 ...
- 11
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2
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1k
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/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 ...
- 21
4
votes
2
answers
365
views
Calculating Error of Arm Manipulator
How can we calculate the error position of arm manipulator?
Let's say we have a Transformation Matrix:
$$\begin{bmatrix}
R_{00} & R_{01} & R_{02} & x\\
R_{10} & R_{11} & R_{12} &...
2
votes
1
answer
47
views
How does structural/installation errors have to be modelled in a gyroscope IMU?
I have the model for a gyroscope from an IMU given by
$$
\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 ...
- 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 ...
- 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 ...
- 31
6
votes
3
answers
7k
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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 ...
- 191
3
votes
0
answers
704
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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 ...
- 191
1
vote
1
answer
387
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 ...
- 111
0
votes
2
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152
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 ...
- 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 ...
- 197
11
votes
1
answer
4k
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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 ...
- 639
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 ...
- 2,453
3
votes
1
answer
308
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.
...
- 609
2
votes
3
answers
260
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 ...
- 21
5
votes
2
answers
3k
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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 ...
- 265
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2
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4k
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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 $...
- 265
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2
answers
334
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 ...
- 249
24
votes
4
answers
18k
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?
- 1,287