Questions tagged [mobile-robot]

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

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Multiple robots performing a set of tasks (Optimization)

Consider a situation where you have a 'm' number of robots and 'n' number of tasks. Each task is at a different location. What optimization algorithm should I use in order to assign a set of tasks to ...
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36 views

Searching for an idea to enhance robot chasis strength

Hello every one I am working on a robot and I am using kinda big motors and I made the body from 5mm plastic sheet and I found that its not strong enough to hold the robot as you see in the pic there ...
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177 views

Suitable D star variant is for non-holonomic motion planning of mobile robots

I am working on a non-holonomic motion planning problem of a mobile robot in a completely unknown environment. After going through some research papers, I found that D-star algorithm is widely used in ...
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193 views

Solar panel set rotation: How to achieve both vertical and horizontal rotation?

How can we achieve this kind of rotation to enable maximum trapping of solar rays during the day?
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80 views

How to approach an object

My question is more on a basic/conceptual level. I'm looking into a way to approach an object in map, that I have detected earlier. My robot is localized in a map using SLAM. And object position is ...
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247 views

Low power to motors — motor power jumper issue

I'm currently working on my first robotics project using the Initio kit from 4tronix powered by Raspberry Pi. The setup was fairly simple, and I've been testing it out over the last couple of days. ...
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174 views

Difference between planetary and precision gear motors

i'm working on a building a rover and would like some advice on selecting motors. In particular, i want to understand the difference between precision and planetary gear motors. My robot will way ...
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1answer
86 views

Extended Kalman filtering for IMU and Encoder

I am trying to fuse IMU and encoder using extended Kalman sensor fusion technique. how do I fuse IMU pitch, roll with the orientation data I obtained from the encoder. Also, how do I use my position x ...
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1answer
57 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 ...
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30 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/...
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89 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}=...
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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 ...
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What robotic skills can I develop when working as a robot operator? [closed]

I find myself very interested to work in the field of robotics though my background is not robotics, I had a degree in Physics, master 1 in Hydrodynamics and this year I have studied just one semester ...
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43 views

Path planning with potential field

Can shortest path be computed using potential field path planning algorithm? Or is it just for obstacle avoidance and navigative towards goal? As i studied potential field deals with attracrive/...
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788 views

Self balancing robot: PID Control Algorithm

I am working on a hobby project for self balancing robot. My robot balances quiet well, so my next step is to start moving it. I saw in some blogs that they used a cascade control algorithm as shown ...
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122 views

What is the front mechanism of this robot's track called?

What is the mechanism on the front of the tracks of this robot called? They are also tracks, but they are able to be moved by the operator, and they are able to function as tracks. I've only seen ...
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28 views

Will a change of motor driver improve motor performance?

I have this motor, from datasheet it works on the 6-12V range and has a no load current of 0.52A, and a stall current of 20A. I want to test the motor before buying an expensive motor driver. I have ...
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86 views

Relation between GraphSLAM and Iterative closest Point algorithm

I have lots of doubts about GraphSLAM, The GraphSLAM Algorithm with Applications to Large-Scale Mapping of Urban Structures. When I practically implement it I get matrix singularity error. I taken ...
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130 views

Matrix is singular error in GraphSLAM

I have gone through The GraphSLAM Algorithm with Applications to Large-Scale Mapping of Urban Structures. I implemented the code for GraphSLAM. The fundamental formula of GraphSLAM is $$\mu = \Omega^...
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43 views

Bluetooth Controls instead of R/C Controls for simple Holonomic robot

I am new here and with little experience in robotics. I have assembled this holonomic robot: https://shop.wickeddevice.com/product/omniwheel-robot-complete-kit/ It has 3 Omni-wheels, 3 gearhead ...
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143 views

How often does a robot perform A* (A star) path planning in an unknown map?

I have read through lectures/ tutorials on A* but they have all been via computer simulations. I have an autonomous wheeled robot that is traversing an unknown map (essentially, it'll be a tabletop ...
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402 views

Can the A* Algorithm be implemented on an Arduino easily?

I am not very experienced in working with C++. Working with Python is much more easier for me because of the large number of built-in mathematical functions present such as multidimensional array ...
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122 views

How to build big robots(Material/Method)?

I am interested to know, if I want to build middle/big size robots(50*50*150 cm^3), which material and which method is better to use? I mean, when I want to build a robot with this size(20*20*20) I ...
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49 views

Inconsistent robot behavior

I am working on a robot project in which I use an arduino mega as the main processing unit, L298N h bridge module as the motor driver and motors like these in a differential drive configuration. I ...
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1answer
40 views

Motor Controller Power Supply

I have an Orange Pi which I would like to use as the computer for a robotic project. It supplies around 15 mAh power directly from the board, barely enough for a single LED so I will have to use ...
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117 views

Permanent Magnet DC Motor Calcuations

I have to determine speed and torque suitable for my combat robot. I've done some calculations and I need to know whether they're right or not (because they don't seem to be right). Suppose I have ...
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27 views

How is Topology-based representation invariant to certain change in environment

The article of Topology-based representation (page no. 13, line 5) says that, topology-based representation is invariant to certain changes in the environment. That means the trajectory generated in ...
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199 views

2D Robot Motion

Good day, I have a robot with an IMU that tells Yaw Rate, and Magnetic heading. It also tells Xvelocity and YVelocity at that instance of the vehicle, on the vehicle frame. (So irrespective of ...
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1k views

How can I measure the actual speed and distance traveled of the robot with an external setup? [closed]

Good day to all. First of all, I'd like to clarify that the intention of this question is not to solve the localization problem that is so popular in robotics. However, the purpose is to gather ...
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70 views

Is it possible to design robot software or AI to function in different devices? [closed]

so i'm really interested in robotics.. I'm not really a robot expert as i have no experience on creating one. I just like them. Anyway, I am always wondering if its possible to build a robot that can ...
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73 views

Arduino mobile robot

Is there a way I can control my arduino robot from anywhere in the world. The robot goes out of range of my home wifi so my wifi shield can't help. Is there a way to make sure the robot is always on ...
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1answer
85 views

Formationing Algorithm for Multiple Robots

I'm looking for an algorithm for formationing multiple robots in 2D simulation. Can you suggest resources about this topic. Also I need suggestions and comments about these topics: Can I recruit ...
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1answer
111 views

How to determine the trajectory reference on the real robot trajectory tracking

I know that we can use some algorithms like LQR, MPC, or even PID to make the robot follows the trajectory references. In the simulation like MATLAB, I usually specify the trajectory reference by a ...
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56 views

Fingerprinting/ model matching algorithms for localization

This paper mentioned the fingerprinting/model matching case. But I could not find an image based algorithm. Any suggestion about image based localization
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890 views

Looking for a cheap(ish) micromouse that I can program with C/C++ [closed]

I'm looking to buy a micromouse (i.e. a small single-board unit with wheels and IR sensors that can move around freely). I've done a lot of searching but have only found resources relating to building ...
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1answer
118 views

Which is more useful? Instantaneous rate of change of displacement or Average rate of change of displacement?

Instantaneous rate of change of displacement is given by, v(t) = (s(t + dt) - s(t))/dt, where dt tends to 0 while average rate of change of displacement is given ...
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95 views

Open source “sci-fi”-like robot projects IRL [closed]

I'm looking for a robot that is capable of moving around and has arms that can get objects in one place and drop in another. Something akin to what we see in most sci-fi movies, though much simpler. ...
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How to avoid false encoder counts due to vibration in robot?

I have a couple of motors on my mobile base other than the drive motors, and they tend to create vibration in the robot. When these motors are turned on, the wheel's encoder ticks increase without any ...
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HTTP requestes for Robot Teleoperation

I'm new to this forum so I apologise if I disrespect some rules. I am considering using HTTP requests to control a robot remotely. The design problem I am trying to solve is that I would like to ...
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1answer
12 views

AC Motors vs Hydraulic motors for skid-steering robot

I'm designing a mobile robot with tracks and skid-steering driving system and I am evaluating whether an electric motor would be better than a hydraulic one. I did some calculations, the total weight ...
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1answer
73 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 ...
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51 views

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

Can I use experience in Game AI development to develop autonomous driving robots? How much similar this areas?
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1answer
30 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 ...
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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 ...
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1answer
44 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 ...
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Free Multibody Dynamics Software?

I'm working on modelling a feller buncher, its end effector consists of a saw to cut trees and claws to bundle them together. I'm looking for a free/open source software that can simulate dynamics of ...
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2answers
668 views

IMU and encoder fusion

I'm trying to simulate data fusion for a 4-wheeled mobile robot using ekf and am using IMU and wheel encoders as sensors,where IMU measures linear acceleration and angular velocity and encoder ...
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1answer
37 views

How can robots communicate, locate and identify each other?

I'm planning to build some simple robotic boats. They will be travelling some distance alone but should also be able to group and physically connect together to form one boat. When they are near each ...
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If you move the RGBD camera to other places on a Turtlebot, same orientation, create a map, does ROS navigation stack with AMCL still works?

I got a Turtlebot, and I’m thinking of putting the RGBd camera to other places. If you move RGBD camera to other places on a robot, same orientation, create a map, does ROS AMCL still works? I am ...
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1answer
247 views

Omni vs mecanum wheels for drawing robot

I'm designing a mobile robot which will have to draw some lines (straight and/or curly) on the floor while it moves. The floor will always be flat with almost no obstacles. The robot will have four ...