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votes
1answer
11k views

Water depth arduino sonar sensor [closed]

Just like a fish finder finds the depth of the water directly beneath it, Im trying to find a sensor that I can purchase for the Arduino that does the same. would like it to check up to 20 ft at least,...
5
votes
2answers
273 views

Kinect for Xbox: SDK selection

My application is basically about sound source localization and visual servoing. I selected Kinect as the main hardware. I already know the basic differences between Kinect for Windows and Kinect for ...
2
votes
1answer
354 views

Maximum angle between the camera pose to correctly estimate homography

I want to capture two views of same scene. The scene consists of a set of objects kept on a table. From the two views, I wish to calculate homography for image matching. I want to know what is the ...
3
votes
5answers
548 views

Using vision for Monte-Carlo localization

From each step of my vision code I am able to get around 400 coordinates of where the robot thinks the walls are I want to integrate this into Monte-Carlo observation step. I'm storing the map of ...
2
votes
3answers
940 views

Compensating for Yaw in Lateral Quadcopter Movement

I'm trying to make a quadcopter move laterally at a certain angle. I've been able to find the proper roll and pitch angles for this (that work with a yaw of 0°); how would I adjust these values to ...
16
votes
2answers
3k views

covariance matrix in EKF?

I'm struggling with the concept of covariance matrix. $$ \Sigma = \begin{bmatrix} \sigma_{xx} & \sigma_{xy} & \sigma_{x \theta} \\ \sigma_{yx} & \sigma_{yy} & \sigma_{y \theta} \\ \...
1
vote
1answer
3k views

How to: Attach wheel encoder to motor?

I have a couple of these DC motors http://www.pololu.com/product/2202 Which have an extended motor shaft that sticks out the back and is 1mm diameter. I'm having trouble trying to think of the ...
2
votes
2answers
476 views

Building a mobile camera platform

I have zero experience with robotics, but I need to build a mobile platform for a streaming camera. The idea is that I'll plug in my Android phone into the pan/tilt unit on my wheeled robot and then ...
2
votes
2answers
374 views

Actuator to control steam valve

I have a steam radiator at home and it has a valve similar to the picture below. Please note that the valve doesn't have grooves on top to attach things to. I want to build something to turn it on ...
0
votes
1answer
193 views

Explanation of the Kalman Filter [closed]

I am a beginner in robotics, and I am learning about the Kalman filter. I do not seem to get it, though. I am a mathematician, and so it would be helpful if the Kalman filter could be explained in a ...
5
votes
1answer
529 views

Cons and pros of wireless technologies for rescue robot

robotics enthusiasts! I'm a member of a team which has to develop a mobile rescue robot to cooperate with firemen (e.g. on earthquake sites). The problem we have is connection of a commander post ...
0
votes
1answer
10k views

Line follower robot program [closed]

I am working on a line follower robot as part of my Microelectronics project, and am confused over what sort of code to use to program the "pic18f" microcontroller I'm using. Can someone give me ...
6
votes
1answer
736 views

Electronic noses for detecting dog urine

I have very limited experience with sensors or robotic components at all, and I hope you will excuse the lack of detail in this Question. I want to set up posts around my yard with electronic noses ...
2
votes
1answer
5k views

What motor to use for reciprocating (reversive) movement [closed]

I want to make a copy of this machine Fisher Price Soothing Motions™ Glider and I'm wondering what motor to use? Simple DC motor with appropriate gearbox (slow rpm) or stepper motor? Here is another ...
2
votes
0answers
239 views

The costs of using existing 6 axis kuka/abb robots and existing vision systems in picking and placing tasks

I would like to use a Kuka/abb 6 axis robot and a machine vision system to pick and place a variety of metal drill bits in size ranges from 0.5mm (ascending up 0.5mm per cylinde) to 13mm in metric and ...
0
votes
0answers
391 views

Simple web interface with beaglebone black

This is actually a very simple question, but I'm lost at the moment. I was using a beaglebone black for a school project. It controls a bunch of motors and actuators,etc. We wrote everything in C++, ...
5
votes
1answer
6k views

How do ultrasonic range finders detect objects at an angle?

As far as I can tell, an ultrasonic rangefinder works by reflecting inaudible soundwaves off of objects and timing their return. But if the object has a flat surface and is angled with respect to the ...
8
votes
1answer
443 views

Monte-Carlo Localization

I'm implementing Monte-Carlo localization for my robot that is given a map of the enviroment and its starting location and orientation. Mine approach is as follows: Uniformly create 500 particles ...
1
vote
0answers
67 views

learning (embedded) electronics [closed]

I am an aerospace engineer (currently in grad school) and I really want to get into (embedded) electronics. But I have this problem: I understand the theory fairly well, I took an edX course in ...
-4
votes
2answers
91 views

What is the Kalman Filter in the basics of its aspects? [closed]

My question is very broad. However I would like a complete description to the very last detail in a way that a foreign exchange student would understand. I want to try my best to master the way the ...
0
votes
3answers
756 views

Is it possible to achieve fully autonomous route following using PX4FMU module?

I have a quadcopter equipped with PX4FMU board. You may download its datasheet from HERE. I wonder whether it is possible to program the quadcopter to autonomously follow a path like circular motion ...
1
vote
2answers
153 views

problem with simulated sensor in Matlab?

I'm simulating a sensor in 3D. The sensor should determine ($p, \theta, \phi$) from the origin where $\theta$ is the rotation about z-axis and $\phi$ is the rotation about x-axis. The sensor is given ...
4
votes
2answers
3k views

Kinematics of a 4 wheeled differential drive robots

I have a 4 wheeled differential drive robot, like the Pioneer 3-AT. There are only two motors, one for left wheels and one for right wheels. I want to send velocity commands to the robot, I'm using ...
2
votes
2answers
1k views

What can be the rating and specifications of dc motor used for making a quadcopter?

I want to make a quadcopter for my final year project and I am willing to use DC motors as the four rotors of the quadcopter. Can any one guide me about the ratings for proper motor selection for my ...
0
votes
1answer
979 views

Tracking 2D positioning with IMU Sensor [duplicate]

I am using a miniature car and I want to estimate the position. We can not use GPS modules and most of the tracking systems that I saw, are using IMU senson with the GPS module. In our car we are able ...
2
votes
1answer
541 views

JSP container for embedded systems

There is this project I am working on which is using a BeagleBone and we need a JSP container to run on it. I was thinking of Tomcat but wanted to know if Tomcat is suitable for embedded systems. Is ...
5
votes
1answer
416 views

Overcorrecting Kalman Filter

I'm trying to get an extended Kalman Filter to work. My System Model is: $ x = \begin{bmatrix} lat \\ long \\ \theta \end{bmatrix}$ where lat and long are latitude and longitude (in degree) and $\...
1
vote
3answers
2k views

System for determining occupied seats in an auditorium [closed]

I need an app that can do live monitoring of whether each seat in an auditorium is occupied, so visitors can load the app and see where to sit. The auditorium has a relatively flat ceiling 4m ...
3
votes
1answer
252 views

Where to start for the software side of Robotics? [closed]

I am a Computer Science student entering my last year of college. I'm pretty sure Robotics is what I want to eventually be doing based on my interests in AI and embedded systems. I've seen a lot of ...
5
votes
2answers
2k views

How much accuracy could I get position tracking with a 3-axis accelerometer and gyro sensor, and compass, and how would I do it?

Given a 12' x 12' field (4m x 4m), a reasonably cheap 3-axis gyro sensor and accelerometer, and compass, I plan to design a device capable of tracking its position to sub-centimeter accuracy for a ...
13
votes
3answers
18k views

Quadcopter PID tuning

In continuation of the question I asked here: Quadcopter instability with simple takeoff in autonomous mode ...I'd like to ask a few questions about implementing a basic PID for a quadrotor ...
1
vote
0answers
90 views

Power Model for humanoids

I am in the process of creating a Power Prediction Model for the Hubo Robot. The Robot has 38 Degrees of Freedom and has a computer some sensors and motor boards. The motors are powered through Motor ...
2
votes
2answers
705 views

KK2.0 Quad Stablility

I'm running a kk2.0 + 4 20A Multistar ESCs + 4 EMax GF 2215-20 motors + 4 Slow Fly Props After about a foot off the ground, the entire quadcopter starts wobbling like crazy (no auto-level). Any ideas?...
1
vote
0answers
156 views

Dynamics of parallel manipulator

My task is to apply forces to control 3-dof parallel manipulator. Forces are applied to linear actuators, friction is neglected. End-effector of a robot is supposed to follow generated path; for ...
0
votes
1answer
110 views

Emulation of an Orrery

Orrery is a clockwork model of the solar system. I am trying to emulate one in 2D. Now, to emulate, I need to know what goes on inside. Can someone please explain the basic principle behind the ...
4
votes
3answers
1k views

2D path following robot, converting XY axis path to input on wheels

at the moment I am creating an android program, that will steer my simple, 3 wheel (2 motors, 1 for balance) robot to move online following the path drawn by user on his screen. The robot is operated ...
3
votes
1answer
125 views

Once you understand motors, what's the next step? [closed]

I've gone through tutorials on how to build circuits and control dc, stepper, and servo motors. I may not understand everything about them internally, but i have a good basic foundation. Now i'm ...
2
votes
1answer
225 views

Workable low-resolution object/target recognition pattern and library?

I've spent quite some time researching this, but most of my Google search results have turned up academic research papers that are interesting but not very practical. I'm working on a target/pattern ...
7
votes
1answer
3k views

Unwanted Arduino reconnect: Servo + Arduino + Python (Raspberry Pi)

I am having difficulty sustaining a connection between my Raspberry Pi (Model B running Raspbian) and my Arduino (Uno) while sending signals from the Raspberry Pi to a continuously rotating servo (...
5
votes
3answers
13k views

Quadcopter Position Measurement (Accelerometer, GPS or Both)?

I previously thought that an accelerometer on a quadcopter is used to find the position by integrating the data got from it. After I read a lot and watched this Youtube video (specifically at time 23:...
1
vote
1answer
1k views

How to choose WiFi signal strength detecting sensors

We want to create robot that will localize itself by the signals of wifi routers. Which sensors should we buy to detect strength of 3 WiFi signal? Which of following is necessary for us? http://www....
10
votes
7answers
14k views

Are Artificial Intelligence and Robotics Different?

I need help in differentiating between AI and Robotics. Are AI and Robotics two different fields or is robotics a subject in AI? I want to pursue a career in AI and Robotics. So I need your valuable ...
2
votes
1answer
86 views

How to gyroscopically measure number of rotations on one axis when there is concurrent random motion on another axis

Can a gyroscopic sensor (comparable to the type that are typically used in smartphones) that is embedded in this black object that is rotating around the X axis measure the number of rotations ...
2
votes
1answer
326 views

Flipping an old manual switch (physical one) [duplicate]

I Have an old audio amplifier that has those switches to turn it on. I'm looking for the simplest motor/robotic arm (or any other relevant component) to control this switch - eventually via Raspberry ...
13
votes
2answers
6k views

Difference between Rao-Blackwellized particle filters and regular ones

From what I've read so far, it seems that a Rao-Blackwellized particle filter is just a normal particle filter used after marginalizing a variable from: $$p(r_t,s_t | y^t)$$ I'm not really sure ...
4
votes
5answers
853 views

Finding inverse kinematics algorithm for a specific manipulator

I need to find a way to solve invrese kinematics for Comau SMART-3 robot. Could you give me a few hints where to start looking? I have no idea about robotics and I couldn't find an algorithm for this ...
6
votes
2answers
358 views

Kalman Filter and the state noise vector?

I'm reading Probabilistic Robotics by Thrun. In the Kalman filter section, they state that $$ x_{t} =A_{t}x_{t-1} + B_{t}u_{t} + \epsilon_{t} $$ where $\epsilon_{t}$ is the state noise vector. And ...
7
votes
2answers
4k views

How to know the desired orientation of a quadcopter?

I am trying to simulate a quadcopter model on Simulink. I want to implement a PID controller for each of X,Y,Z and phi,theta, psi angles. PID gets the error, as input, which is to be minimized. For ...
7
votes
2answers
709 views

ComputerCraft (Minecraft mod) navigation: Collision avoidance and path planning/finding in 2D/3D space

I'm programming Lua for controlling computers and robots in-game in the Minecraft mod ComputerCraft. ComputerCraft has these robots called Turtles, that are able to move around in the grid based(?) ...
1
vote
0answers
36 views

Zero crossing events in trapezoidal commutation [duplicate]

I would like to ask a question about zero crossing event in a trapezoidal commutation on a brush-less DC motor. Here is the waveform that shows that the zero crossing event occurs every 180 electrical ...

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