Robotics Stack Exchange
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1500 questions
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Connecting a 6 pole motor to a motor driver?

We are trying to power this motor with this motor driver , using a 11.1V 2.2Ah lithium-ion polymer battery. (We're in over our heads with this and really need the help) We checked with the company (E-flite) and the motor is definitely DC -- we're a…
Olly the idiot
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Controlling multiple Arduinos wirelessly

I am designing a experiment of controlling 6 small wind turbines wirelessly. For each wind turbine, I need to measure power time series (or voltage or current time series) from the generator, and control blade pitch angle, yaw angle, and generator…
Jinkyoo Park
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Is increasing gyro , accelerometer sensor range is good or bad ? how does it affect the accuracy

I've been using mpu6050 IMU unit ( gyro + accelerometer ) I found that I can set acc range to +/- 2g or 4g till 16 g and same for gyro +/- 250 deg/sec , 500 deg/sec and so I know that they are low cost and full noise , so which settings to the…
RoboMan
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the uncertainty of initializing new landmark in EKF-SLAM

In EKF-SLAM (based-feature map) once the robot senses a new landmark, it is augmented to state vector. As a result, the size of the state vector and the covariance matrix are expanded. My question is about the uncertainty of the new landmark and its…
CroCo
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For robot wheel control : Brushless DC motor or Servo Motor?

Simply, when to use brushless dc motor and when to use Servo Motor ? what are the differences , specially when adding an encoder to the dc motor you can have the position and it will be similar to Servo Motor ?
RoboMan
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Quadrature Encoder Counts

Actually , I have been since two weeks looking for convinced and final solution for my problem , actually I am completely lost , I am working on mobile robot (Rover 5) with 2 motors , 2 encoders . the controller that designed to the robot needs to…
Maria88
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Choosing motor for a tricopter

I'm a newbie in RC field..I am planning to construct my first Tricopter ever. Can anyone help me to find the power rating to select the motor for a tricopter? I am at the beginning stage of construction. Arm length of frame: 50cm each. I need a…
Shiv Ram
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Pulse Position Modulation as used in RC controls

How are several channels multiplexed down to a single physical wire? If two channels are transmitting the same value in the same frame, wont there be an overlap of the pulses?
RaGe
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Is there any advantage to velocity motion models over odometry motion models for SLAM?

I've seen several examples of SLAM algorithms (EKF SLAM, Graph SLAM, SEIF SLAM) written in terms of the velocity motion model. I have yet to see an example of any SLAM algorithm utilizing the odometry motion model. I wonder if there is an inherent…
Paul
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Comprehensive comparison of SLAM algorithms

I'm looking for a research paper or series of papers that compare the performance of various simultaneous localization and mapping algorithms for rovers in a variety of real world environments. In particular, i'm looking for computational speed,…
Paul
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How to machine aluminium on a low budget?

For my robotic projects I need some aluminium parts. Currently I am looking for a way to build a chassis including simple gear box. So I need relatively high precision. Which options do I have to machine aluminium without investing in expensive…
danijar
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Which micro-controler/processor to be used for autonomous stereo vision robot system?

I am very new two robotics, however I have a working stereo algorithm which I want to combine with a SLAM algorithm. I am developing this system for an other application but I decided integrating it on a robot first and testing it might be a good…
Svenja Woicke
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Tilt-compensated compass - at my wits' end

I'm a bit at my wits' end here - I'm trying to build a tilt compensated compass for my autonomous sailboat (ardusailor!). I'm using an InvenSense MPU9150. Originally, I used the built-in fusion support on the sensor to get a quaternion, pull the…
kolosy
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What is the difference between screw and wrench in rigid body motion?

A screw is defined by a six dimensional vector of forces and torques. It can represent any spatial movement of a rigid body (as written here). But I don't get the following distinction between screw and wrench: The force and torque vectors that…
Milla Well
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IMU based acceleration parameters for differential drive robot

I have a differential drive robot whose motors are virtually quiet while driving on a completely flat surface, but the motors make a lot of noise when on a incline. This is likely due to the correction required to maintain speed with the high…
Pototo
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