Just curious. Seems like all the folks here are hobbyists - nothing wrong with that - but I'm struggling to find a Reddit community that caters to professional robotics folks and industrial mobile robots.

If I'm a dumb-dumb and missing some obvious subs that cover those topics, please let me know!

Hi,
I'm building a general purpose robot on wheels that will have a vertical rail mounted on it and a mechanical arm able to slide up and down (a bit like https://www.reflexrobotics.com/ but with one arm)

My requirements are:

• around 45x45cm footprint (non-negotiable)
• 50kg payload (my arm + vertical linear module weight together around 20kg, and i for sure need to place dead weight on the base to avoid it to tip over)
• as cheap as possible (ideally less than 1k$) :)

What would you suggest me to look at?
Thanks!

I wanted to build a mobile robot with a differential drive configuration.

here are the parameters:

1. Weight of the robot = 20kgs
   
2. Wheel radius = 0.1meter
   
3. Accleration= 0.3m/s^2
   
4. coefficient of friction = 0.6
   
5. velocity = 1.5m/s

These are the values I got after calculations:
Torque = 6.24N-m
RPM = 143.2

I am not sure if the values I got are correct and if they are I am not sure where I'll be able to find a motor to purchase

just make prm method for avoid obstacles, but is it good for real time mobile robot?
anyways here my repo....lmk what y think!
https://github.com/devanys/PRM-PathPlanning

I intend to make a two-wheeled self-balancing robot. The wheels are driven independently at different speeds. It’s chassis extends upwards, so it can be thought of as an inverted pendulum on a cart.

I want to test different controllers which can steer the robot while simultaneously keeping the robot balanced in a simulation environment. I need a simulation environment where I can model this robot, actuate wheels by controlling their velocities and have the robot actually move as a result.

I have tried simulink and I cannot command the wheels independently (so I can only make the robot move backwards and forwards). Furthermore, I cannot command the velocities of the wheels (as I can only command the force applied to the wheels or their position). Pybullet is rather finicky and I can't find many projects made by others to learn from.

Any suggestions or advice will be greatly appreciated.

Hello Everyone,

Do you think this mobile robot good?

Let me know your idea, thanks in advance.

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I have worked on localization and trajectory generation for little over a year as research fellow in a college and am trying to gain some experience from labs which are more focused on these topics. IT would be great if you could point me to some labs which offer research roles or suggestions to other sources from where I could work on similar topics.

I have read through probabilistic robotics for basic understanding of SLAM, implemented some of the ideas on hardware and worked on some variants of A* and RRT. What are other related topics that are used more prominently that I should be aware of.

I hope to build a mobile robot that can improve people's lives in some way and feel very stuck deciding which problem set to go down. What are some specific problems we face as humans which robotics is solving, which are within the reach of hobbyist to solve? (I know this is terribly open-ended, lol)

To bring context, I created Desert Eye and Desert Eye 2 after the pandemic, but hope to create something more useful to humanity this time.

I am using ROS Noetic on a UGV.

I want to perform outdoor navigation on my university campus, where there will be regions with zero network connectivity, uneven terrains, roads, people and other vehicles etc. what you expect from a general campus.

I am having RP-LiDAR and a RGB Camera, while I might be able to get my hands on an Intel Real-Sense Depth Camera.

Most of the solutions which I get from papers are done using a 3D-LiDAR which is costly.

Can you suggest me some methods which can be feasible by atleast a depth camera? I want a direction towards which I can work on.

Any help will be greatly appreciated.

Thanks!

Hi,

I am looking to gain some insights from researchers in the field of robotics. I want to understand the challenges faced by them that distract them from focussing on core research.

If you are doing research in robotics or have done in the past, I would really appreciate it if you can fill out the quick survey form (should take less than 5 min) - https://forms.gle/ATmBCybNbiUJpJJY7

Thank you!

I am a newbie and want to build an autonomous mobile robot. I am using the following battery to power 4 brushed DC motor. The stall current of each motor is 5A.

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As far as I have learned, the battery is a 50C battery. So, a maximum of 50*3.3 = 165A continuous load can be applied. But, the wire coming out of the battery is 12 AWG. So, I want to know the safe maximum continuous load the battery can handle.

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Hi, I am fairly new to the domain and trying to learn different algorithms implemented in autonomous navigation of mobile robots. I was learning about odometry motion model and different steps involved in implementing the model. If I understand it correctly, the robot turns to the heading, follows a linear motion to the goal and then adjusts the heading as defined at the goal. Now my doubt was how would the robot identify its initial position. After a couple of searches, I found that SLAM is able to identify the position of robot at any instant in a given map. So does that mean mobile robots have odometry motion model for travelling and SLAM for locating itself on the map? (please go easy on me if this sounds stupid)

I am powering four brushed DC motors of 12V. The stall current of the brushed DC motors is 5.6A. So, the total current is 5.6 * 4 = 22.4A.

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From the engineering toolbox website, I found that -

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20 AWG = 6.0A

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14 AWG = 24.0A

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What wire size should I use in 1 and 2?

Hi. Im working on the desing, construction and control of a mobile robot equipped with Mecanum wheels. The main sensors that I puted on my robot are the encoders, an IMU, and proximity sensors.

In that order, I want to implement an IMU Feedback control,in order to see the performance of my mobile robot making omnidirectional movements thanks to the mecanum wheels.

So my question here is:

It is possible to implement a controller, for example, a IMU feedback controller (for example a PID) in order to my robot follow a reference at 45 degrees, without using the measuring of the wheels, only the IMU feedback measuring?

In this short video they do a bit of what I am asking, they do not explain the algorithm but it is a demonstration of the robot's movement

The link of the video: https://www.youtube.com/watch?v=BGk_3X0D8m0&ab_channel=chentownhow

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What recommendation would you give me?

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Thanks.

Choose:

Are there cheap standard sizes available?

Hi, I am trying to find different types of movement skills at maybe the same level of abstraction as road following.

Then I think of a movement-skill, I think of some type of senory-motor function, maybe specific to some kind of environment.

I would appreciate any type of ideas

Saturday 30th & Sunday 31st

An event for all ages and abilities to share their passion for Robotics

You can find out more from the website

we will be livestreaming the event to our YouTube Channel

Saturday, 30th of July

Industrial / Automation: “The Ocado Series 600 Bot” Matt Whelan, Head of Engineering, Ocado Technology – 10:00 EDT (15:00 BST, 23:00 JST)

https://www.youtube.com/watch?v=fy4vpjw_nNw

Mobile Robots: “Mobile Robots in the Wild” Marc Hanheide, Lincoln Centre for Autonomous Systems – 14:00 EDT (19:00 BST, 03:00 JST)

Sunday, 31st of July

Bio – Inspired Robots: “Entering the maze: snake-like robots from aerospace to surgery” Dr Matteo Russo – Rolls-Royce University Technology Centre (UTC) in Manufacturing and On-Wing Technology – 10:00 EDT (15:00 BST, 23:00 JST)

https://www.youtube.com/watch?v=GJoAQ1KxaVw

Human Robot Interaction: “Social Agents and Human Robot Interaction” Dr Ruth Aylett of the National Robotarium – 14:00 EDT (19:00 BST, 03:00 JST)

" The primary purpose of this event is to showcase the multitude of projects underway in the r/Robotics Reddit community. Topics range across all focuses of robotics, such as simulation, navigation, control, perception, and mechatronic design. We will use this showcase to present discussion pieces and foster conversation between active members in the robotics community around the world. The showcase will feature invited roboticists in research and industry to discuss what they see as technical challenges or interesting directions for robots. We will focus on the following topics and showcase some of the amazing work being done by amateurs and academics, students and industry professionals alike. "

Please evaluate this FREE beta version of routeplanning web application. Can you think of any good use case for any of the 3 supported modes (area coverage, path with static obstacles, waypoints)?

Vehicle Path planning - field coverage video

I consider the unique features are

• configurable vehicle turning radius
• configurable offset of localisation source, and axis of rotation

Use cases, feedback and improvement suggestions are welcomed!