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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2answers
171 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
73 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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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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223 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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1answer
578 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
89 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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3answers
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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
409 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
130 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
186 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
108 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
17 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
197 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
82 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
43 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
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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
47 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
5k 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
119 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
51 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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172 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
1k 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
153 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
47 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
91 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
27 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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4answers
1k 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
55 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
71 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
1k 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
224 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
527 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
142 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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2answers
143 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
140 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
2k 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
556 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
27 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
153 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
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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3answers
303 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
77 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
158 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 ...
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3answers
332 views

Find the robot pose from three beacon measurement

At every timestep my robot gets sensor measurements from a scanner that finds three beacons with known poses $B_1 = (B_{1x}, B_{1y})^T, B_2 = (B_{2x}^T, B_{2y}) , B_3 = (B_{3x}, B_{3y})^T$ these ...
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0answers
462 views

Obstacle avoiding by Pi camera [closed]

I designed a mobile robot with my colleagues for our graduation project, the purpose of it is to detect mines (metals) in a specific area We are programming the robot using Python on Raspberry Pi 3 ...
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1answer
185 views

Software for mission planning in multi-robot systems

I am interested in mission planning for multi-robot systems. Given multiple robots and multiple tasks and an environment, I need to specify missions and software should plan for the robot team to ...
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0answers
42 views

How to choose a motor for water surface vehicle? [closed]

I am about to build a water surface vehicle (a kind of boat). I was looking for different type motors and ruled out the stepper and servo motors. But I got confused between brushed and brushless dc ...
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1answer
279 views

What is the intuitive explanation of using Jacobian of observation model while calculating Kalman gain in EKF SLAM?

The idea of using Kalman gain in EKF SLAM is to figure out how much we trust our motion model and sensor/observation model. As explained in The Extended Kalman Filter: An Interactive Tutorial for Non-...
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2answers
375 views

Will two 8-bit microcontrollers running in parallel perform similarly to a single 16-bit microcontroller?

Let's say I have multiple (8 bit) sensors which are sending signals to two microcontrollers simultaneously. In this case, I am looking to harness the parallel processing capability of the two ...
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2answers
133 views

Algorithm for Determining Mobile Base Positioning Given End Effector Pose

I have a 6 DOF arm robot with a mobile base, and a given x/y/z/quaternion vector that the end effector must match. I am to determine the most optimal position of the mobile base such that an IK ...

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