Questions tagged [mobile-robot]

A robot which is capable of moving from one place to another, usually of its own volition.

Filter by
Sorted by
Tagged with
1
vote
0answers
19 views

How to find the optimal path for a line following maze robot?

First let me explain the problem. This is a maze made only out of black lines on a white surface. The robot has only a few IR sensors which can sense the position of the line. No other sensory input ...
-3
votes
0answers
42 views

What is the Extraordinary Real Fast Robots in 2020?

What is the Extraordinary Real Fast Robots in 2020? I read this article at this blog site techtokmunch. If anyone have other information about fast robots in 2020, please share. Thank you.
0
votes
1answer
38 views

Advantage of Kalman filter in differential drive planar robot

We need to estimate the position and orientation of differential drive robot by using encoders and imu sensor. For this specific case, is there any advantage of using Kalman filter than taking the ...
-1
votes
0answers
20 views

Lego Ev3 Brick Speed with Python code

If programming EV3 brick with Python is the speed reasonable for mobile differential drive robot? I mean if we use sensor fusion for encoders and imu, and also do PID speed control of wheels, and with ...
1
vote
2answers
59 views

Arduino for mobile robot

Is it possible to drive the whole mobile differential drive robot with single arduino? Sonar sensor, servo motor, two encoders, two motors, imu, etc. I mean would it give a reasonable performance or ...
1
vote
1answer
45 views

Controller algorithm implementation in ROS/Gazebo

I am doing some robotic simulations in ROS/Gazebo and wondering what is the best way (programming-wise since I don't have a CS background) to implement a robot's motion controller. Here are the ...
0
votes
0answers
29 views

Use Camera Calibration Matrix without Toolbox

I am doing this little project where try to calibrate a Raspberry Pi Camera. I use Matlab and I do not want to use the Calibration Toolbox (!). The algorithm I use is the direct linear transformarion ...
1
vote
1answer
46 views

How to drive mecanum wheels robot: code or algorithm

I have a robot with four mecanum wheels and I would like to make it move correctly by using a RC transmitter (my controller has two sticks and several buttons, each stick has a proportional range of [...
1
vote
0answers
34 views

Are rotary encoders necessary for holonomic mecanum drive?

I'm making a robot which is going to have a holonomic mecanum drive. The doubt that I'm having is that should I use rotary encoders for doing so. The bot will be manually controlled so would it be ...
0
votes
1answer
23 views

Forward kinematics of spherical parallel manipulators with revolute joints

I found an article that can help in my investigations. Forward kinematics of spherical parallel manipulators with revolute joints The problem is solved for the following system of vectors, which is ...
0
votes
0answers
21 views

Ceiling Camera & robot - SLAM still neded?

I've got a question regarding the topic of SLAM. My composition consists of a mobile robot and a top down looking 2D camera with wide-angle lens. It is comparable to a survaillance camera mounted on ...
0
votes
1answer
52 views

Collaboration of mobile robot and survaillance camera - classic localization (still) needed?

Just started with the topic of mobile robotics.. so I'm still into concept making and little programming, but have not setup everything or tested at all. I got a (differential) mobile robot (lego ...
1
vote
1answer
35 views

How does scan matching find overlapping regions in two scans?

I have been reading about scan matching and so far I have gathered that scan matching tries to find the transformation (rotation and translation) which leads to the best match between overlapping ...
0
votes
0answers
31 views

Robot-telescope prototype controlled by a PC

Has anyone developed mechatronic systems for DIY-telescopes running a PC? Please share your experience, knowledge and nuances (how you acquired current sensors, speeds, electric motors, about ...
0
votes
1answer
67 views

Modeling of Robots

There are mainly two approaches for controlling robots (mobile robots and static robots): 1) working with kinematic equations, controlling joint or wheel speeds , 2) working with dynamic equations and ...
0
votes
1answer
49 views

Can I apply a common voltage to a high speed running DC motor to stop it? Will it damage the DC motor?

I decelerate the velocity of my robot very quickly by applying a common voltage (eg. 24V to both the terminals using Motor driver) to the DC motors. Given, the motor is running at a very high speed ...
1
vote
0answers
22 views

How do I say if a system is differentially flat?

I am studying mobile robots, and I have encoutered the concept of differentially flat systems. I have seen that if a system is differentially flat, we can identify flat outputs, thanks to which we can ...
0
votes
1answer
30 views

Doubt on artificial potential field

I am studying motion planning, and I am focusing on artificial potential fields. I have seen that it consists in having a repulsive field for obstacles, and an attractive field toward the goal. But ...
1
vote
0answers
48 views

When do I do motion planning?

I am studying mobile robots, and I am focusing my attention to the unycicle. I have a doubt concerning the motion planning part. In particular I don't understand when the motion planning is done and ...
2
votes
0answers
26 views

Choosing right motors for self-balancing robot [closed]

I’m looking for right motors for my first self-balancing robot. Design assumptions: robot height: around 120-200 mm robot weight: around 600-800 grams wheels: 80x10 mm or 90x10 mm battery voltage: ...
1
vote
3answers
47 views

I wanna make a raspberry pi car using an RC car. I would like to know if the servo multiplexer is necessary?

So I'm working on a project and it involves making a raspberry pi car, be it from scratch or with the help of can rc car. I chose the latter. Now the problem is I don't really have servo multiplexers ...
0
votes
0answers
19 views

robot movement steps

What does term "number of movement steps" mean in multi-robot exploration?. It is a performance metric for comparing results like exploration time and energy consumed by robots during exploration.
0
votes
1answer
40 views

Robot localization in a known map without knowing its initial position in that map

Firstly I would like to say that I'm no expert in Bayesian Filters such as Kalman Filter and Particle Filter, but I've used the EKF before in a robot that has both wheel encoders and an IMU to ...
2
votes
2answers
46 views

What's the difference between Pose Measurement and Position Measurement?

I have read a robotic related paper called Estimating SE(3) elements using a dual quaternion based linear Kalman filter, and the author proposed that the equation of position measurement is denoted as:...
0
votes
1answer
38 views

Can I use experience in Game AI development to develop autonomous driving robots?

Can I use experience in Game AI development to develop autonomous driving robots? How much similar this areas?
0
votes
1answer
77 views

How to find inverse kinematic equations for a quadruped robot to make it walk?

I have made a model of quadruped robot (sprawling/spider type and not dog type) in V-rep and now I want to make it walk by using creep gait. (i.e moving 1 leg at a time) As I understand, I have to ...
0
votes
3answers
82 views

Robotic arm servo motor- Not enough torque

I require your help regarding a problem I’m encountering. I am a beginner in robot modelling. I am designing a robotic arm for agricultural use and I am having issues with the motors. I am using ...
0
votes
1answer
29 views

How to calculate the right needed Power?

Me and my team are building a robot and I need to calculate the Power of the motors. Through my research I found that I must know the needed torque for every motor and then convert it to electrical ...
0
votes
0answers
14 views

Integrating Arduino Cloud Platform into ROS

I have an existing ROS framework used for an autonomous driving vehicle. I am working on tests to understand how localization is affected by light. My existing hardware does not have a lux measurement ...
1
vote
1answer
50 views

How to calculate battery capacity for my robot system

I am part of a team and we build a robot. I know how many watts all the subsystems of the robot will need and I also know how much time we want to operate it. Our system will need 323.344 Watt and we ...
0
votes
0answers
33 views

Path planning for a unicycle

I am having some troubles understanding a concept regarding the path planning for a unicycle. Suppose I want to plan a path that brings a unicycle from the origin to the point $\begin{pmatrix} 1\\ 1\\...
0
votes
1answer
28 views

What is the Control mixer block that is usually found in control schemes?

There is usually a control mixer block in control schemes in robotics. What is it and what is the functionality and where can I read more about it. Reference to the paper: https://giuseppesilano.net/...
3
votes
1answer
58 views

how to use ROS navigation stack with 4 wheeled robots

I have a 4 wheeled toy car, with 5 motors, one on each wheel and one is used for steering. How can I use ROS navigation stack with this robot since navigation stack is used with differential drive ...
2
votes
1answer
26 views

Angular Velocities of CoM in Global Coordinate

The block diagram of the robot is shown as above. Here, $\phi$ is the angle between $X_v$ and $X_0$ (Yaw angle of the robot), and $\psi$ is the angle between $Z_b$ and $Z_v$ (pitch angle of the robot'...
0
votes
0answers
54 views

feedback linearization for a quadrotor

I am trying to develop a controller for a quadrotor using dynamic feedback linearization technique, but I am not sure I am doing thigs correctly. I know that for designing such controller I have to ...
0
votes
0answers
37 views

What is the ~tf_prefix parameter does?

I have a TurtleBot3 Robot and when I’m trying to do this command to start the nodes (The ROBOT is real) roslaunch turtlebot3_bringup turtlebot3_robot.launch I’m ...
0
votes
2answers
72 views

how to implement a wall following controller for a TurtleBot3? (ROS - python)

I want to implement a wall following controller for my TurtleBot3 (with ROS system). sensors which I have on the robot: lidar(360) and optional 2 ultrasonic sensors on the side (1 on left and the ...
-1
votes
1answer
18 views

rtk-gps faster (60Hz) and cheaper?

The below rtk-gps measures position to about 1.5inches for $1500 and an update rate of 5Hz on gps, and it measures 12.6mm x 4.6mm so that it would easily fit inside of a 20mm-diameter tube-shaped ...
0
votes
2answers
56 views

Localize a Mobile Robot on a Mirror

I am currently busy with a project which requires me to construct a robot capable of cleaning a heliostat (movable mirror used to redirect sunlight). Heliostats are basically large flat mirrors that ...
0
votes
0answers
34 views

Mobile Antenna question

I have a rocket-shaped (tube-shaped) mobile 20mm in diameter. From a base-unit, 600yards away, I want to be able to send two floats (call it x and y) every 1/60th of a second (60Hz data rate [or ...
2
votes
3answers
136 views

How to control the velocity of a mobile robot?

I have a differential drive robot whose linear velocity and angular velocity is to be controlled. The current strategy for doing that is: A high level path tracking module spits out the reference ...
0
votes
1answer
71 views

How does it get a bizarre term in triangle law of vector equation in a paper

I am reading the paper "Motion control of wheeled mobile robots" at page 5, as we have the equation (34.7), i wonder how it contains $− dc(s)\dot s$ in side. As the triangle law of vector: $\vec{OP}=...
0
votes
1answer
60 views

What is the cheapest 20mm-diameter roll-angle-sensor (+/-10deg, 60Hz update) you have come across? [closed]

What is the cheapest roll-angle-sensor (10degree accuracy, 60Hz update) you have come across for airborne mobile robots that have a 20mm diameter, shaped like a rocket? (The robot is shaped like a ...
0
votes
1answer
37 views

Does Vehicle Yaw angle measures same at every point on it? If not, how to translate yaw rotation to COG of the vehicle from different point?

I am using an IMU to measure the yaw rotation angle of a car. I need to translate the rotation measured to COG of the vehicle. I can ignore roll and pitch as I am driving it on a flat surface. So, ...
0
votes
1answer
197 views

teleop_twist_joy with Logitech F710 Joystick force feedback error

I am using a Logitech F710 joystick game controller in ROS Kinetic Kame. I was able to perform jstest testing, and can see my joystick works well. But when I try ...
0
votes
2answers
66 views

Variables that Improve SLAM

I have a general question regarding SLAM as I am not an expert on the topic. What are the variables that can improve map generation? The ones I can think of are: A higher resolution camera ...
3
votes
2answers
94 views

Why is behavior-based robotics not as popular as deep learning or reinforcement learning?

I am a master student in Germany and one of our professors is doing robotics research but with a different paradigm - the behavior-based robotics based on Subsumption Architecture developed by prof. ...
0
votes
0answers
7 views

2 NAO robots and a human interacting and exchanging an object

I need to solve the following scenario between 2 NAO robots and one human. Maybe you have advice which NAO accessory or builtin sensor is accurate enough to measure such a distance of 0,5 meters and ...
0
votes
1answer
53 views

Plot a map using wheel encoder and IMU data

I want to plot a map( with matplotlib or any other library ) using a wheel encoder and IMU data. Eg:- For every 10cm robot moves it should draw line (in a graph) and draw angles depending on the data ...
2
votes
0answers
85 views

In SLAM loop closure, What does a sim3 matrix do?

I am confused between 3D rigid affine(with scale, without shear) transformation and Lie group's sim(3) matrix. 3D affine would be [sR|t; 0 1]. we rotate, scale and then translate a 3D point using ...

1 2 3 4 5 12