Robotics Stack Exchange
Robotics Stack Exchange

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1500 questions
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2 answers

I want to control a sewing machine motor; need help with choices

I've got an industrial sewing machine (think "can sew with thread that looks like string, and has no trouble pounding through 20 layers of Sunbrella fabric"); it's got a 1 HP motor to power it. (I've got a smaller machine as well, w/ a 1/2 or 3/4 HP…
John
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Why can't i use different ESCs together on a multirotor?

I'm working on a diy quadcopter build from scratch and have bought a 4pack ESC from Castel Creations.While i currently have my quad up and running(sort of), from what i've read on the various sources and forums on the internet, i am not able to/ not…
Kenneth .J
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How to tune the PID parameters using Fuzzy Logic?

I previously used the Ziegler method to tune the parameters of my PID controller to control my robot's position. I then implemented fuzzy logic for self-tuning the parameters. I have two inputs to the fuzzy logic controller; one is the position…
Moayad Hani Abu Rmilah
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3 answers

how to power extra usb devices for beaglebone black

I'm building a robot that uses a beaglebone black, however I have several different usb devices that I want to connect to it (microphone, usb sound device and some other things). Now I have heard that the usb output of the beaglebone doesn't power…
Thijser
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4 answers

Robot docking for self-recharging

I want to build a simple obstacle avoider robot, but this time I want it to be self-recharging so I am building a dock for this purpose, so I want it to be able to locate the dock and go for it when battery voltage is lower than a fixed value. I am…
Jihed Jaouabi
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7
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How to estimate yaw angle from tri-axis accelerometer and gyroscope

I would like to estimate the yaw angle from accelerometer and gyroscope data. For roll and pitch estimate I've used the following trigonometric equations: roll = atan2(Ax,Az) * RAD_TO_DEG pitch = atan2(Ay,Az) * RAD_TO_DEG and a simpified version…
UserK
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Position Controller for a Quadrotor

I have a question regarding the implementation of a quadrotor's position controller. In my Matlab model the quadrotor takes 4 inputs: a desired altitude ($Z_{des}$) and desired attitude angles($\Phi_{des}$, $\Theta_{des}$, $\Psi_{des}$) which…
Wilhelm
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Deducing single wing plane transfer function Aka Transfer function estimation through set of points

I'm trying to control a plane via roll using PID controller , I had a problem finding the transfer function thus I used the following method :- Fix the plane in an air tunnel change the motor that controls the roll in fixed steps and check the …
RoboMan
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What are some low cost alternatives for lidar?

It need not be as effective as lidar or it may have some disadvantages when compared with lidar. What are the probable alternatives? Edit: I'm intending to use it outdoors for navigation of autonomous vehicle. Is there any low cost LIDAR or is…
seetharaman
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Ackerman steering model

I am trying to create a simulation of a robot with Ackerman steering (the same as a car). For now I'm assuming that it's actually a 3-wheeled robot, with two wheels at the back, and one steering wheel at the front: Knowing the wheel velocity, and…
Rocketmagnet
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How much torque do I need for a CNC machine?

I have a handful of 31.2oz-in stepper motors (Mouser.com - Applied Motion: HT17-268D), and I was curious if they would be big enough to run a 3D printing/cutting/etching type (think RepRap) of machine. I had in mind to attach them via a simple gear…
Nathan Wheeler
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What is the technical name when robot wheels are aligned to perform spot turn?

I have a robotic simulator that enables a 6 wheel rover to perform spot turn. To prepare the rover to spot turn, I have to arrange/align the wheels in such a fashion: // \\ || || \\ // What is the technical name of…
ikel
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Cascading PID DC Motor Position & Velocity Controllers

I'm trying to build a robot with a differential drive powered by two DC Motors. First I implemented a PID Controller to control the velocity of each motor independently. Estimated the TF using the MATLAB's System Identification Toolbox, of the open…
rflmota
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Are inverse kinematics and reinforcement learning competitive techniques?

Are inverse kinematics and reinforcement learning techniques contending techniques to solve the same problem viz. movement of robotic manipulators or arm? By a glance through the wikipedia article, it appears that inverse kinematics seems to attempt…
Lord Loh.
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Learning Algorithms for Walking Quadruped

I'm building a 4 legged robot (quadruped) with 3 Degrees of freedom per leg. The goal of my project is to make this robot able to learn how to walk. What learning algorithms will I need to implement for it to work? I'm using an Arduino Uno for the…
Jordan
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