# All Questions

4,704 questions
Filter by
Sorted by
Tagged with
101 views

### How Can A Total Beginner Become A Skilled Roboticist?

Say the only computer skill you have is programming in C/C++...what all things would you have to learn in order to be an adept full stack roboticist, one who can single-handedly build an autonomous/AI ...
24 views

### How do you control the end effector of a rigid body system using keyboard keys?

So in my lab, I am to create a rigid body tree robot that has an end effector that can be teleoperated by keyboard commands. I found a function called waitforbuttonpress that allowed me to give the ...
51 views

### Mapping of dynamic environment

I want to do path planning in dynamic environment in which obstacles keep changing. Could you suggest me good path planning algorithm for this? . Is D* algorithm suitable for me to achieve this in ...
26 views

### I want to actuate a motor based on a wav file, but it has too many samples per second

I am trying to actuate a simple DC motor based on a wav file. At the moment I am using the "cat vs dogs sounds" from Kaggle. One of the wav files in this DB looks like this: These audio files are ...
34 views

### Avoid to hit corners on diagonal steps using A* algorithm

I'm using ROS melodic with Gazebo 9.9.0 on an Ubuntu 18.04.2 LTS. I'm implementing an autonomous node that uses A* algorithm to move a robot from one position to another. The robot will be on a ...
11 views

### disparity error to x and y accuracy

This question talks about the depth error ($\Delta$Z) as a function of disparity error ($\Delta$D). I want to do the same for X and ...
21 views

### Why was the Shadow robot hand been utilized for teleoperation?

With a deep neural network it's possible to convert a camera signal into the movement trajectory of a dexterous robotics hand.[1] In contrast to previous attempts in teleoperation, which are working ...
7 views

### Should I uninstall the WinUSB driver from my Flight Controller in order to flash it properly?

https://hyperion-world.com/download_files/manuals/HP-FCF3EVOB2-MAN.pdf (page 8-10) I'm following this manual to flash my F3 Evo Brushed flight controller, but I went too far ahead and replaced the ...
35 views

### Mapping of unknown environment

My question is how do obtain occupancy grid map given sensor data of a robot? . I searched a lot and concluded that by using proximity sensors (rangefinders, sonar) and putting that data in occupancy ...
16 views

### Sourcing catkin workspace populates ROS_PACKAGE_PATH with individual package paths

When creating a new catkin workspace, building it and then sourcing devel/setup.sh, the ROS_PACKAGE_PATH is populated with paths ...
22 views

### Gazebo: SetPosition() function in the Joint class doesn't set the joint position and returns false sometimes

I am trying to initialize the positions of my robot using Gazebo Plugins. SetPosition() function of the Joint class is supposed ...
34 views

### Force Controller for robotic manipulation

I want to implement a force controller but I don't understand some concepts here. I saw some books that say the output torque command of the force controller and the impedance controller will be ...
17 views

### ROS packages for *pre-planned* path navigation rather than path generation? (Turtlebot3/ROS)

I am working on a project in which users will create paths fully constrained in terms of position (using a separate piece of software), and a robot will periodically follow those paths. We are using a ...
30 views

### IMU outputs data to Arduino Serial Monitor but ROS hangs when waiting for IMU to boot?

I am trying to use an IMU in a robotic car. Specific IMU: https://learn.sparkfun.com/tutorials/9dof-razor-imu-m0-hookup-guide?_ga=2.87322972.515701132.1562620054-1210936642.1562620054 Specific ROS ...
27 views

### Native ROS vs ROS compatible via API

I am looking to buy a cobot for a research project (budget about 20k€). I happened to see some cobots (e.g. Mara) that claim running ROS natively, some others (e.g. Aubo i5) that is compatible with ...
25 views

### How to get a wired live feed from camera to phone

I need a clear video live feed from a camera to an android phone. The connection does not have to be wireless because i have to use it without any internet. The camera and phone will be 2 or 3 meters ...
9 views

I have a requirement to handle Mavlink v2 messages using Typescript / Javascript and in the mavlink official page i could see that Typescript / Javascript support is provided with the help of the ...
25 views

### Can Swedish wheels be used in two wheeler configuration?

Can we use any of the Swedish 90°/45° Omni or Mecanum wheels in two wheeler configurations?
21 views

### e6 Stock to Create Platform?

Can a new iRobot Roomba e6 (WiFi enabled, scheduling robot) be hacked like the iRobot Create, while allowing it to do a bit of vacuuming during non programming time?
43 views

### solving for unknown 2d rotation + translation

This is a continuation of the question I asked here. I thought I'll ask a more concrete question. So far, this is what I have done to transform from a feature point detected by camera sensor in to a ...
38 views

### Artificial Intelligence and Open source pipeline for automated design, simulation and analysis of robotics systems

I have heard about open source 3D printed robotics projects (https://www.poppy-project.org/en/ is somehow obsolete example). My question is - are there open source holistic/integrated frameworks of ...
27 views

### How does structured light improve accuracy in stereo vision?

In my understanding, in order to improve accuracy for the estimation of depth with a stereo vision camera, patterns of light are projected into the scene, because the resulting texture makes it easier ...
19 views

### CMA Net - How to export all statistics ? (In Excel/XLS)

On the lower-right of the screen, there is an "Archive" button, from which I go to the dialog box/window where there are Delete, Delete all, Export and Load options, but there is no "Export All" ... ...
45 views

### Is This A Colour Sensor?

Hi Iam new to robotics and stack exchange and Iam 13 years old,this is a IR sensor, can you tell me that is this thing have a colour sensor on it?
34 views

### What should i do to rebuild robot salto from Berkeley uni as a mechanical engineering undergrad?

What are the main components of robot salto? What are the necessary skills and knowledges to reproduce it? Also as you can see, i am a mecheng and i want to reproduce this robot as finishing project ...
46 views

### Multiple machine ROS image transmission error

I'm currently trying to establish communication between my Raspberry Pi based robot and a Cluster which are on the same network. Although I am able to ping and SSH one device using the other, I'm ...
34 views

### building a grid map from gps trajectory poses

I am trying to create a feature grid map with Images from camera mounted to the top of the car. Novatel ProPak RTK gps poses Beforehand, I've checked to ensure that the standard deviations of the ...
35 views

### Multi robot exploration

I am implementing 2d slam for multi-robot exploration for my university project using GMapping package of a ROS and vrep sofrware. But I also have to implement the following three algorithms in ...
15 views

### How to calculate the mean of an unsymmetric distribution (Particle Filter)

I'm attempting to implement a variant of Monte Carlo localization in a 2D space with obstacles. While the object is moving around the obstacles the particles flow around the obstacle like in images ...
84 views

### Inverse Jacobian to find joint angles

I am trying to implement a joint space control with the UR5 in MATLAB/Simulink and have programmed the forward kinematics of the same. Now, I want to find out the joint angles of the manipulator using ...
43 views

### What is the relation between FOV, Focal Length and Sensor size in a Pin hole Camera Model?

I aim to recreate the camera parameters of my camera in the Unity rendering system, which has the following variables: 1) I tweaked the focal length and saw that the Field of View is changing (...
23 views

### Effiecient computation of coriollis matrix

I want to perform kinodynamic motion planning on a 6DoF hybrid manipulator. I calculated mass matrix, coriollis matrix etc using the lagrangian method. The coriollis matirx was calculated symbolically ...
10 views

### Remove jittering from head pose estimated via dlib face detector

I am using dlib’s face detector with openCV to measure head pose and then use these values to render a Vr scene in unity 3D. The only problem is the jittering in the values estimated via computer ...
32 views

### Specification calculation for choosing a proper stepper motor for Ball Lead / Screw system

I'm trying to build a motorized stage which moves in one direction as below picture based on this article. Desired characteristic properties are: 1. screw length = 150 mm 2. screw diameter = 14mm ...
25 views

### How do I set all objects in my scene to be aligned with respect to the camera in Unity 3D?

To elaborate further - How do I fix the camera as the origin of the 3D world? The context is I am trying to create some synthetic image data for a robotics project, and I have the coordinates of the ...
49 views

### Robotic arm for university student [closed]

Can anybody recommend a robotic arm to be possibly coupled with VR to be used for educational purposes for university students within a bucket of about 15000€?
33 views

### 3D template for irobot-create [duplicate]

Does anyone know where I can find the template of the face plate for the Create 2.0? I would like to print or laser-cut.
50 views

### Occupancy grid mapping

I want to construct 2D occupancy grids for mapping of an unknown environment. Could you guide me how can I achieve it? What I have researched is that robot can construct its map given sensor data ...
60 views

### How to build map for unknown environment? [closed]

In order to create a map for unknown environment, we have two solutions: The size of the area should be given (grid-based maps) so simply we create 2D grid and have our robot to move discrete ...
22 views

### Differences between strapdown inertial navigation and motion models

In a state estimation scheme with a simple IMU/GNSS setup using EKF, I have always thought the prediction step would be done using a motion model and all sensor measurements would be incorporated via ...
16 views

### Trajectory tracking problem for non-holonomic mobile robots

Currently, I am working on the trajectory tracking problems of autonomous ground vehicle and a little confused about the applicability of control theory for different types of wheeled mobile robots. ...
25 views

I made a quadcopter with an Arduino and all connections are fine. When I arm it, the motors spin without props but when I connect the props and arm it, the motors spin for a second and stop. Can ...
44 views

### How to render a robotic arm in Unity?

As part of a research project, I'm creating synthetic data, using the Unity engine. I have the final pose of a robotic arm (6 params: 3 for orientation, 3 for location/position), and also a .ply file ...
21 views

### How to determine x-axis if the two z-axis are parallel in Denavit Hartenberg representation

I have problem of determining the DH table, specially finding x axis when two z axis are parallel to each other
43 views

### EKF SLAM : SLAM specific Jacobians for new landmarks

I am currently trying to understand the books SLAM for dummies and Simulataneous localization and mapping with the extended Kalman filter to implement slam. I have understood steps 1 and 2 SLAM for ...
16 views

I am new to programming Bluetooth modules with Arduino UNO and would like to read a light sensor remotely and turn lights on remotely. Can I put an address of a HC-06 or HC-05 into the BTserial.read() ...
35 views

### Can drone fly in predefined fixed trajectory without GPS

Is it possible to make a drone to fly in fixed altitude and move in fixed trajectory without GPS. (Drone has to move in fixed path which is already defined). I am saying without GPS because drone has ...
19 views

### Best way to turn large “lazy suzan” bearing with stepper motor [closed]

I'm designing an automated object capture turntable (take photos -> photogrammetry) where the platform the object sits need to rotate, driven by a stepper. The catch is the base is glass as I need to ...
48 views

### How does 3D Lidar work

It is a beginner question for most of you, I had Google this question but I didn't reach any satisfied answer . What is the returned raw data from lidar,difference between 2d and 3d lidar ? How we map ...
25 views

### g2o Graph optimisation, What edge to use for a distance constraint?

//cross posted from stackoverflow. If that is not ok, I will delete! I have an optimisation problem that I am trying to solve with g2o I have a data set which is N noisy Poses (XYZ), and known (less ...

15 30 50 per page