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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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193 views

Adding ROS to Raspberry Pi car and teleoperation

I just completed a Raspberry Pi car setup shown in the image below. With my car now assembled, I can run a simple Python script put the necessary GPIO pins HIGH or LOW and moves the car around ...
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2answers
126 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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0answers
19 views

GNSS-aided IMU calibration

I have a physical system that consists of a GNSS receiver and an inertial measurement unit (IMU) with accelerometer and gyroscope. I would like to determine to some level of precision the angular and ...
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29 views

Need help with drivetrain system for a 4-wheeled mobile robot Arduino and Ros

Looking at all these great, specific question in robotics stack exchange, I'm afraid I am a complete beginner at creating a robot and with ROS and arduino. My aim in the long term is to learn how to ...
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0answers
22 views

Updating the covariance matrix with limited amount of corrections

I am doing small experiment with mobile robot wall following and EKF SLAM with only one short range laser. The robot starts to predict its position directly when its founds the first landmark and its ...
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2answers
82 views

Robot heading uncertainty values

I'm tracking the state of a robot using an EKF defined by: $$(x,y,\theta)$$ where $x$ and $y$ are the coordinates in the ground-plane and $\theta$ the heading angle. I initialized the covariance ...
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2answers
102 views

How to implement reference control signal for robot heading?

Some time I found that some robot controller uses a critically damped reference control signal such as in Autonomous Surface Vehicle (ASV) heading controller. My question is how do we implement this ...
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3answers
60 views

Are there any open-source congnative planing frameworks for robotics?

I have seen a lot of academic papers, but no framework that I can download and use. There are even projects, such as OpenCog, which might be usable in a few years. I would like to know of the ...
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115 views

loop closure detection in visual SLAM

A robotic system is moving a getting its current location using visual odometry (incremental estimation of rotation and translation). To correct its localization, a loop closure technique may be added....
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92 views

How does one setup an ESC to drive a wheel-hub motor?

I have 2x 350W wheel-hub motors taken from a self-balancing scooter, or hoverboard. My intention is to use the two of them to drive a homemade R2-D2. However, some difficulties have been encountered ...
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0answers
158 views

How to simulate water/ pool for underwater vehicle in Gazebo/SimScape?

I have tried SimScape and gazebo but I did not get a solution for simulation of a swimming pool. Can somebody help with the same? Do I have to create the whole swimming pool using simple rectangular ...
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2answers
61 views

Are there any big size open source robot project(servant like robot maybe)

I am trying to build a big size robot (150CM height) like this: But I don't have mechanical engineering knowledge for that. Also it's only a prototype to show how the robot will act(it's more relies ...
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318 views

Iterative Closest Point for 2-D LIDAR Data

I have two 2-D point clouds obtained from LIDAR (Light Detection And Ranging) scans at two different poses (positions and orientations) inside a circular structure, where a small object (vertical ...
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1answer
200 views

Wheel odometry simulation using ground truth

I'm tracking the state of a robot $X=(x,y,\theta)$ where $x$ and $y$ are the ground coordinates and $\theta$ the heading angle. I have the ground truth states $X_{gt}=(x_{gt},y_{gt},\theta_{gt})$. I ...
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1answer
53 views

Programming the Formula Allcode to run a circuit

In our engineering science lesson, my class has been tasked with programming the Formula Allcode buggy to run a pre-specified circuit with smooth turns. The issue we are having is that we do not know ...
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1answer
117 views

good laser scanner/ lidar for 4 wheel robot? [closed]

i was wondering what could be a good laser scanner can someone get for as much as 180$ ? i am planning to use it from SLAM to build a map, so this is why i wanted to ask here ? have anyone tried ...
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1answer
47 views

How do i figure out how much thrust an 150cc Size Brushless Outrunner Motor will output with propellers? [duplicate]

I need to know this as i'm trying to figure out if two of these could lift approximately 170 pounds of wheight. And that's includig batterys and the motors.
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1answer
14 views

are these two logic level shifters are doing the same job

I am just in need of a level shifter and I want to ask if these two are doing the same job without any difference, if there is a difference I need to know 1 : https://www.sparkfun.com/products/12009 ...
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2answers
68 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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1answer
68 views

Sex Robotics for everyone male and female [closed]

How much would a sex robot cost, and is it ethically correct?
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1answer
28 views

Connect to e_puck, Could not connect to com3 at 115200 ERROR!

So I have an E-puck robot, and I'm using Tiny Bootloader from this website: http://www.etc.ugal.ro/cchiculita/software/picbootloader.htm I've paired the robot up on my laptop's bluetooth. It appears ...
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1answer
30 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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1answer
41 views

How Do You Program the SR04 Ultrasonic Sensor?

Dear Robotics Community, I am participating in a Robotics tourney that will start in a few weeks. The challenge I signed up for is to deliver and dump ping pong balls to a box. I already have my ...
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1answer
4k views

Quicktron company - Mobile robots (Equivalent of Kiva Systems?) [closed]

Since some months on many websites, I read and I have seen images of the Alibaba (the Chinese e-commerce giant) warehouses. One example is the following article: http://www.dailymail.co.uk/news/...
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1answer
74 views

How's robot vacuum cleaner back to charger when battery is low? [closed]

What's technology robot vacuum cleaner used to locate it's charger when battery is low ?
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1answer
41 views

I am looking for some basic mechanical parts to build structures(prototypes)?

I am looking for something like this part in these photos: to make my robot ideas as prototype. But I don't know it's name! Also if there are better options I will happy to know.
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108 views

Beginners guide to Inverse Kinematics for biped robots? [closed]

I'm building a LynxMotion Scout biped and believe that IK are the best way to develop an effective gait. I'm a mechanical design engineer - I currently have minimal skills / experience with ...
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2answers
450 views

Nuc, custom pc or raspberry pi?

For our Minor “Robotics and Vision” we need to use ROS to create a system that can navigate to and from a coffee machine. The available hardware consists of a robotic platform from "Dr Robot", and a ...
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1answer
117 views

Robot Position Control on Treadmill

Previous Question Hello, In continuation of my question above, I have another question. I have managed to control the speed of the treadmill using a PID and StevO mentioned to me how the scaling from ...
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1answer
44 views

Are there any Open-Source bricks projects for robotics?

I mean some bricks like Lego/Meccano with a community like Instructables site, those share their models and robots with others. Also the 3D models of bricks(in solidworks format for example) are free ...
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1answer
78 views

How many robots is considered to be a robotic swarm not a group of robots?

Does the literature on swarm robotics define the smallest number of robots required to make a "swarm". Is it 10, 20 or 100 robots, or does the name depend on something other than the number of robots?...
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1answer
25 views

Question about terminology of robotic architecture

Most home or entertainment robots I see are either manual human remote control or have the processor on-board and are completely self contained. Contrast to this robots which are neither, but are ...
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2answers
238 views

IR pattern projector

I am currently working on a robotics project in which I wish to integrated a depth/object scanner. Now my focus is currently on an IR camera in combination with some sort of IR pattern projector. ...
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1answer
42 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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2answers
60 views

Is there a formal name for translating poses into robot states?

I've been working on a module that takes in planar poses $\begin{bmatrix} x_{t_{k}} & y_{t_{k}} & \theta_{t_{k}}\end{bmatrix}^{T}$ and spits out expected robot states $\begin{bmatrix} x_{t_{...
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1answer
294 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 ...
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0answers
121 views

Controls Project, Inverted Pendulum. Design issues

I am developing an inverted pendulum that uses a differential drive robot as base. The goal is to create a benchmark to practice my control using ROS, so I can implement what I learn on the Modern ...
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1answer
258 views

How to eliminate motion blur with realtime performance

I have a robotic system to develop, in first phase of the project I need to track an object. So I placed a geometrical marker on the object to estimate it's pose (rotation, translation). It all works ...
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2answers
120 views

explanation of kalman filter

I have gone through my lecture notes but I can't seem to figure out the five different steps of a Kalman filter and how these steps are Divided into prediction and correction and how the state and ...
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0answers
58 views

AmigoBot - Laptop connection via usb port Linux

I want to control the AmigoBot in Linux operating system. I wrote C++ code ARIA and tested it in MobileSim simulator. Now it works fine in simulator, but I cannot manage to connect robot to my laptop ...
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2answers
69 views

Localizing two points using self position and angle between this points

my question is about localizing points in 2D space. I know exact position (x,y,alpha) of my robot in some room. In room there are two points of unknow location. Robot can find angle between he and ...
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0answers
118 views

Kalman filter localisation equations

I am doing mobile robot localisation as a project. Now I stuck in obtaining the equations of EKF localisation. My robot moves straight for 10 seconds parallel to x-axis and robot equipped with 2 ...
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2answers
435 views

What's the diffrence between $H_2$ and $H_\infty$ controll?

There a two controllers named $H_2$ and $H_\infty$. Can someone explain if: They have have guaranteed stability margins? Do they have a Kalman filter? Are they for both SISO and MIMO systems? Can I ...
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1answer
337 views

Mobile robot pose estimation

I want to plot the path of a vehicle via the estimation of egomotion based on essential matrix. Everything was fine with openCV and the following function. ...
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0answers
20 views

Issues with the dual VNH2SP30 motor carrier and 131:1 metal gearmotor 37Dx73L mm w/ 64 cpr encoders

For a while now I have been trying to build my own robotic platform, kind of like a turtlebot. However, I have kept running into an issue with controlling the motors. My main controller for sensor ...
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0answers
74 views

Quadrapod vs Hexapod [closed]

I want to build a robot, but I don't know if I want to build a quadrapod or a hexapod. I would like to use three servos/leg. Can you tell me what are the pros and cons of quadrapods compared to ...
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1answer
37 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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2answers
168 views

Grid based SLAM using BeagleBone Green Wireless and RPLIDAR

I've written a grid based DFS algorithm with a PID-based steering system to maneuver a 30cm2 square-grid maze all in Python. The robot is a 4 wheel drive with an approximate size of 20 cm. The ...
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1answer
49 views

Why the bldc motor not able to move my water boat?

I have a 1100kv brushless motor from dys with a propeller as shown. I have attached this motor to two pvc pipes joined together as shown and packed the electronics inside polyform to protect from ...
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1answer
104 views

Calibrating a laser scanner to a line camera

We have a high-resolution Riegl laser scanner and mounted atop it a Resonon Pika L, which is a hyperspectral camera which records one spatial column at a time, using the second dimension of the sensor ...