Robotics Stack Exchange
Robotics Stack Exchange

Most Popular

more tags
1500 questions
3
votes
2 answers

How to build a fast quadcopter?

I'm currently in a (risky) project that involves me building the fastest quad I can afford. I'm trying to get something close to this extremely fast warpquad After reading a lot about quadcopters, as I know I can buy all this and it should fit…
Nanoc
  • 107
  • 9
3
votes
2 answers

Quadrotor - Control system, where to begin?

I am starting to assemble a quadrotor from scratch. Currently, I have this: Structure; an IMU (accelerometer, gyro, compass); 4 ESCs and DC motors; 4 propellers; Raspberry Pi to control the system, and; LiPo battery. I have calibrated the ESCs and…
osuarez
  • 358
  • 1
  • 2
  • 12
3
votes
3 answers

Need help for a quadcopter PID

I'm trying to make a quadcopter with Arduino. I already have the angles (roll pitch and yaw) thanks to an IMU. They are in degrees and filtered with a complementary filter. I want to apply a PID algorithm for each axis but I dont know if the inputs…
Leyre
  • 31
  • 2
3
votes
3 answers

Is modelling a robot and deriving its Equations of Motions more applicable to a system that is inherently unstable?

As someone who is new and is still learning about robotics, I hope you can help me out. Let's say I have two systems: (a) Inverted Pendulum (unstable system) (b) Pole Climbing Robot (stable system) For system (a), I would say that generally, it…
goddar
  • 311
  • 1
  • 10
3
votes
2 answers

Using Gazebo installed on same machine in MATLAB

I am planning to use MATLAB and Gazebo for one of my course projects. However all the tutorials I have seen till now use Gazebo by using a virtual machine which has ROS and Gazebo installed. I have already installed ROS and Gazebo on this machine…
Anupu
  • 33
  • 3
3
votes
2 answers

Should the therotical parameters match the physical setup constraints when modeling a robot?

I'm working on modeling and simulation of robotic arm, after I obtained the mathematical model of the robot, I used that to implement some control techniques, to control the motion of the robot. The dimensions and masses of each links are taken from…
AlFagera
  • 241
  • 5
  • 19
3
votes
3 answers

Real-time video processing on video feed from a drone's camera

I am working on a project where I want to run some computer vision algorithms (e.g. face recognition) on the live video stream coming from a flying drone. There are many commercial drones out there that offer video streams,…
Mohamed Khamis
  • 133
  • 5
3
votes
1 answer

Accurate Wheeled Robot Odometry

I'm looking for a "good" algorithm/model for wheeled odometry estimation. We have encoders on the two back wheels of the tricycle robot, and IMU on the controller board. Currently we use MEMS gyro for angular velocity estimation and encoders for…
DikobrAz
  • 241
  • 1
  • 4
3
votes
2 answers

4dof or 5dof robot arm with stepper motors tool-chain for an hobbyist

In the past I built some simple robot arms at home, using RC servo motors or stepper motors (till 3dof). I would like to build a new arm with 4dof or 5dof with the steppers. Until now I used Arduino and A4988 stepper drivers and Gcode. For…
Alessandro
  • 31
  • 2
3
votes
1 answer

image processing

I am making a Robot goalie, the robot is supposed to detect whether a ball has been thrown in its direction , sense the direction of the ball and then stop it from entering the goal post. A webcam will be mounted on top of the goal post. The robot…
user10752
  • 31
  • 1
3
votes
2 answers

How to calculate the current consumed by a brushless motor on a quadcopter

I want to create a virtual quadcopter model, but I am struggling to come up with a satisfying model for the brushless motors & props. Let's take an example, based on the great eCalc tool: Let's say I want to know how much current is consumed by the…
Eric Leibenguth
  • 141
  • 1
  • 1
  • 6
3
votes
1 answer

Could anyone tell me what are these things in a Roomba robot and how to clean them, please?

I'm really in doubt whether it is proper to ask this question here, so I'm apologizing if it is not, I'll delete it. I have a Roomba robot which has worked for me for more than three years, and now while it is working it is producing some strange…
d.k
  • 133
  • 4
3
votes
0 answers

Maximum ball screw speeds

What is the maximum rotational velocity of miniature ball-screw (diameters up to 12mm) for approximately 1000 thrust cycles, and which type/brand would that be, if the speed is limited by the ball return mechanism? The fastest I could find was 4000…
JJM Driessen
  • 562
  • 3
  • 11
3
votes
3 answers

How to sumarize Kalman filter covariances for display?

I'm implementing an extended Kalman filter and I'm facing a problem with showing the covariances to the user. The covariance matrix estimate contains all the information we have about the current value estimate, but that is too much to display. I…
cube
  • 729
  • 6
  • 17
3
votes
2 answers

Simple Neural Network with hardcoded positions for walk optimisation

I'm building a quadrupedal robot that will learn how to walk. From the responses I got from asking if its possible to run a NN on a micro controller I realised I needed to think of a clever system that wouldn't take 1000 years to be effective and…
Jordan
  • 911
  • 1
  • 7
  • 18
1 2 3
…
99 100