Robotics Stack Exchange
Robotics Stack Exchange

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1500 questions
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2 answers

State estimation of mobile robot

For a mobile robot - four wheels, front wheel steering - I use the following (bicycle) prediction model to estimate its state based on accurate radar measurements only. No odometry or any other input information $u_k$ is available from the mobile…
evolved
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How to speed up colcon build (notably slower than catkin/cmake) and or debug causes?

My team has a ROS2 humble docker image we use for development. It contains our dependencies along with a source installation of Humble targeting Ubuntu arm64 architecture on a Nvidia Jetson device. Building our source code takes a very long time (up…
user1433734
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Quadrature encoder signal from dc motor is very noisy

I'm starting out with robotics, got my first DC gear motor with quadrature encoder (https://www.pololu.com/product/2824): I ultimately plan to hook it up to a motor driver connected to a Tiva Launchpad. However, since I'm a noob, and curious, I am…
neuronet
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Power solution for Raspberry Pi robot

I am building a Pi car with 4 gear motors (190-250mAh each max). Now I want to use my 10000mAh USB power bank to power up raspberry pi along with the 4 gear motors. I can power up the raspberry pi directly but I want to use my power bank as the only…
Tanvir Rajeev
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What are good, low cost, actuators for a braille tablet to be controlled by arduino?

I want to basically make a pin matrix controlled either by spring, electromagnets or small motors(spring being the most viable option), something like what’s shown in the image. I'm pretty new to arduino and hardware in general so any input would be…
Aditya Krishn
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Localization of a Robot to find it Coordinates according to the Known Map

I am a third-year electrical engineering student and am working on an intelligent autonomous robot in my summer vacations. The robot I am trying to make is supposed to be used in rescue operations. The information I would know is the position of the…
Rabia Khalid
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3 answers

Addressing the sample impoverishment in particle filter

I have implemented a particle filter algorithm for the state estimation of a mobile robot. There are several external range sensors(transmitters) in the environment which gives information on the distance (radius) of the robot based on the time…
ZincFur
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quaternion implementation

I am trying to implement quaternions and i am using CC2650 sensortag board from TI. This board has MPU9250 from invensense which has Digital Motion Processor (DMP) in it. This DMP gives quaternion, but for my understanding i implemented my own…
Vinay
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2 answers

Cant see Kinect Data in ROS

I am working on this project that involves using the Kinect for XBOX 360S with ROS. I did all the steps mentioned in the ROS Tutorials to have Openni Installed and the Prime sense and other drivers. and when i go to Openni samples i see a output.…
Preetham Hegde
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looking for a miniature joystick, but in reverse

Does anyone know if small mechanical actuators exist which can be controlled electrically, sort of like a miniature joystick, but in reverse. Instead of it picking up mechanical movement and outputting electrical signals, I want it to generate…
Scott Stensland
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Is there a way to combine and sync two 2K cameras @ 90fps with ICs

I am searching for a way to minimize the size of a stereo vision module and cannot find any ICs that will combine and sync two MIPI CSI-2 (4 lane) data streams without an FPGA and too much code. there was one online (MAX7366A 3D Video…
Will
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Motor Choice given size constraint and load requirement

Good day everyone :) I am an undergraduate student working on a project involving the use of high torque small-sized DC motors for use in designing a person following trolley bag. Where in the problem is to use small sized motors but still maintain…
lyrad
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How to produce a continuous variation of a discontinuous function?

I have a differential equation that connects the "velocity" of a point in the FOV of a camera with the velocities of a robot's joints, that is $$\dot s=J(s) \dot q$$ where s is a vector with the $x$,$y$ coordinates of the point in the FOV, $J$ is…
Controller
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I'm looking for hands-on experience with different types of leg and hip designs for walking robots

I'm looking to find out, How do human-like legs compare to chicken legs and four-leg systems. In terms of cost, performance, speed, strength and accuracy. I'm interested in things like speed, agility, turning radius, complexity and cost. For a…
Sinpwnzorz
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How to split tasks between interrupts and the main loop on a bare metal controller?

I'm working on a robotics project where I have 3 services running. I have my sensor DAQ, my logic ISR (motor controller at 20kHz) and my EtherCAT slave controller. DAQ and EtherCAT run in the idle and the logic runs during an interrupt. The logic…
Ortix92
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