0
votes
1answer
6 views

PD Algorithm for a Quadrotor [Simulation]

I have a big problem trying to stabilize a quadrotor with a PD controller. The model and the program has been written in C++ and the model dynamic has been taken from this source in internet: Well, ...
0
votes
0answers
7 views

Reverse lift mechanism

I have made a RC robot from a wheelchair and I'm planning to attach a snow plow. I'm wondering if there is any mechanism that would be able to lift the plow when reversing. I have only 2 channel ...
0
votes
0answers
8 views

Using kinect for medical application but without computer. Is it possible?

I have to use kinect for an application. However, the final work must be mobile: it means no computer. Consequently, I thought using a microcontroller to handle data from kinect. But is it possible? ...
-1
votes
1answer
31 views

How to make a robot which will sense badminton shuttle cock?

I am designing a badminton playing robot which will have 4 wheels....how to sense the badminton shuttle cock so that it will detect and hit it back.which motors and electronic circuit should i use to ...
0
votes
1answer
38 views

What are the calculations for a badminton robot and mechanisms?

I am designing a badminton robot but i am very confused about mechanisms needed for a badminton robot and various calculations needed for millisecond response.I am also confused about calculations ...
0
votes
0answers
14 views

How to control an Arduino Board with wireless PS3 controler?

I'm currently building a hexapod bot, composed with an Arduino Mega board and an USB SSC-32 (from Lynxmotion). But now I want add a PS3 wireless controller to move my hexapod, I have made some search ...
0
votes
0answers
24 views

Odometry of mobile Robot

Before any thing I am beginner in Arduino field , I am working on mobile robot (Rover 5) with 2 motors , 2 encoders . the controller that designed to the robot needs to know the odometry of mobile ...
0
votes
1answer
24 views

How to make automated toys?

I'm not sure this is the right place to ask this question, but I have joined this page as my search was ended with "Robotics" subject. I asked google the meaning of this word and it said, see the ...
0
votes
0answers
13 views

Velocity derivatives using Quaternioins

I am interested in the velocity derivatives of Quaternions. I am new to this area. I have studied the algebra of Quaternions but unable to understand how to compute velocity derivatives.
1
vote
2answers
23 views

Can we use this line sensor as a proximity sensor?

Basically, i have this sensor (link to the model given below). It is designed to distinguish black and white lines. It detects white surface and gives me digital 1 as output and 0 in case of black. ...
2
votes
1answer
20 views

Yaw angle calculation for drone PID from two distance sensors

I'm building a control system with a Parrot AR 2.0 drone where I have access to thrust controls for up/down (z), left/right (y), forward/backwards (x), turn left and turn right (yaw) through a Ruby ...
0
votes
2answers
21 views

12V Arduino Dual Bridge to supply at least 5A

I am looking for a 12V Dual Motor Controller that can supply at least 5A per channel for two 12V motors, and that can be used with an arduino. Do you know of any product with those specs? Thanks
1
vote
1answer
29 views

Purpose of programming an Esc

I am planning to buy an esc for my tricopter setup. What is the purpose of programming an esc? I am cost effective and is it really necessary that I should necessarily buy a programming card to ...
1
vote
1answer
51 views

PID Tuning Quadcopter Problem

I am tuning PID for quadcopter, the problem i have is that with different base Throttle, i seems that i have to adjust different PID gains in order for the quadcopter to balance!
2
votes
0answers
21 views

Ensemble Kalman Filter SLAM

I know that there is an extended kalman filter approach to simultaneous localization and mapping. I'm curious if there is a SLAM algorithm that exploits the ensemble kalman filter. A citation would ...
1
vote
0answers
18 views

Correcting GPS track with visual odometry (sensor fusion)

I am trying to build low cost and precise outdoor positioning. I explored NS-RAW with RTKLIB - this would be doable but probably will need either a base station to get the correction data for rover or ...
0
votes
1answer
47 views

How can one create a robot which respondes to input following a flowchart?

What are the most basic skills and components needed for creating a robot which gets two "yes" or "no" inputs with two push buttons, and goes down the defined flowchart and plays the relevant audio ...
2
votes
1answer
42 views

Pledge algorithm for maze solving robots

i saw this maze, and tried to apply pledge algorithm on it. But i am not able to solve this maze using this algorithm. what am i missing? i want to ask, what i am doing wrong? PLEDGE ALGORITHM: in ...
3
votes
2answers
64 views

Whats the logic to implement a particle filter for a robot with range sensor?

I am trying to implement a particle filter for a robot in Java. This robot is having a range sensor. The world has 6 obstacles - 3 in the top and 3 in bottom. I am calculating the distance of the ...
1
vote
0answers
23 views

Euler Angles from 9DOF IMU

Using the Adafruit 9DoF module I Need to convert the Accel + Magneto + Gyro into Euler Angles for a motion capture application. Any hints on where to start? Managed to get X,Y,Z when the IMU is ...
1
vote
1answer
18 views

which type of camera should be used for detecting road lanes for good processing in matlab

What are the parameters which should be selected to choose camera for lane detection system.What parameters should be kept in mind (like picture quality,frame rate,cost e.t.c). Which camera will suit ...
0
votes
0answers
16 views

How to implement linear movement with string

How to implement linear movement with string, like here. I'm wondering how it's possible that the friction on the wheel on motor's shaft is enough to move the (heavy) camera?
1
vote
1answer
61 views

Quadcopter cannot balance!

I am bulding a quadcopter using these compenents: Microcontroller: Tiva C Lanchpad (ARM Cortex M4 - 80 MHz), but running at 40MHz in my code MPU 9150 - Sensorhub TI ESC - Hobbywing Skywalker 40A I ...
1
vote
1answer
36 views

Robot Loud Alarm

We are working on a project where we want to sound an alarm if somebody is messing around with our Robot (e.g., the Robot is being shaken abruptly or the cameras/LIDARs are blocked). I am using "loud ...
3
votes
1answer
28 views

How to get pure end-effector translation through Jacobian?

I have a 7 DOF arm that I am controlling with joint velocities computed from the Jacobian in the standard way. For example: $$ {\Large J} = \begin{bmatrix} J_P \\J_O \end{bmatrix} $$ $$ J^{\dagger} = ...
4
votes
1answer
52 views

DC motor control - speed-torque curve

I am having some trouble understanding how to practically use the speed-torque curve of a DC motor. I understand that the gradient of the speed-torque curve is defined by the design of the motor, the ...
1
vote
1answer
32 views

How to calibrate an IMU unit?

Simply , how can I calibrate IMU unit ? I read some papers about this topic and was wondering if there are any standard methods.
1
vote
2answers
60 views

What's the most adapted programming language for Robotic and principally AI? [closed]

I'm currency a Web programmer and I'm very passionate by robotics and specialty for Artificial Intelligence. I have already make some C++ program for Microship and Arduino for little robots and ...
1
vote
3answers
29 views

Relative Navigation Systems

Im trying to develop a system that autonomously navigates a large outside space, where accuracy is vital (GPS is too inaccurate). There are a number of options but have largely been used inside, has ...
3
votes
0answers
45 views

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 ...
0
votes
2answers
39 views

How to calculate Altitude from IMU?

How to calculate attitude from IMU ? For example, mathematical equations
1
vote
0answers
60 views

Quadcopter one beep and blink problem

I have just built my first quadcopter, and have run into a bit of a snag. When I plug in the power, I only get one beep and a red blink from the flight control board, and nothing else happens. When I ...
0
votes
1answer
29 views

Servo controlled valve

I am trying to build a servo-controlled water valve. Max pressure 150 psi , valve size 1/2". Can anyone recommend a suitable 1/4-turn valve, either ceramic, ball valve, or anything else that is easy ...
2
votes
1answer
8 views

how to make Mac detect AVR board using USBasp and burn program to it?

I am new to Embedded, starting with AVR programming using C. I am working on Mac OS 10.9.4, so far I am using avrdude and xCode as IDE. It works very well, for now I am testing my code using Proteus. ...
0
votes
0answers
15 views

single motor for multi operation

Suppose I want to perform two tasks, move my robot and rotate one different independent part on robot. What is the minimum cost way to drive both system by single motor at different time. (I mean when ...
1
vote
2answers
30 views

image size vs image resolution

I read somewhere that in the case of photoshop for example, the size refers to the number of pixels an image contains, but resolution involves the pixel's size, I don't know whether this definition ...
1
vote
2answers
24 views

Need to clear some concepts: AHRS - Attitude - Yaw,Pitch and Roll - MARG sensors -INS

it's been while since I started reading about INS, orientation and so for quadrotors . I faced the following terms : AHRS - Attitude - Yaw,Pitch and Roll - MARG sensors I know for example how to ...
0
votes
1answer
20 views

What's the difference between Yaw and Attitude in Quad Rotor

I have a big miss conception between Yaw and attitude ? Isn't both represent "how far is the quad from earth ?" Also if you could post how to calculate them from IMU (gyro +accele + magent )
1
vote
1answer
50 views

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 ...
0
votes
0answers
5 views

Influence of the number of octaves on the features description

In the field of computer vision and more specifically in the subject of local features detection and description, most of the times the pre-processing phase involves the construction of the ...
2
votes
2answers
30 views

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?
1
vote
2answers
42 views

Assumptions about the nature of landmarks in SLAM algorithms

I'm trying to understand the role of landmarks in SLAM algorithms. I've glanced over a few books concerning landmark based SLAM algorithms and I've come up with a rudimentary understanding which I ...
2
votes
3answers
46 views

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 ...
3
votes
4answers
106 views

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: ...
1
vote
1answer
23 views

Finding changes in environment using 2d laser

I have known map of the environment (2d occupancy grid map). I am trying to find if anything changed in environment using 2d laser while navigating by using maximum likelihood of laser with known map. ...
1
vote
0answers
22 views

Raspberry Pi finer servo control

I'm usig RPI and Servoblaster to control servos. I've set the --step-size to 2 us, but I'd like to decrease it to 1us. I've tried to set the ...
5
votes
2answers
41 views

computer vision using the FREAK local features descriptor - why overlapping fields?

I am currently studying the FREAK descriptor and I read the article published by its designers. It states that the aim was to mimic the retinal topology, and one of the advantages that could be gained ...
1
vote
1answer
28 views

What would be a good heuristic to solving this?

The aim is to guide a bot from Source S to Goal G while passing through all the checkpoints ...
0
votes
0answers
8 views

How to operate al422b

i want to use Ov7670 cmos with fifo with my mega. But a little bit confusing to operate the Al422b. I'm always get the same data when doing read operation. Can anyone teach me how to use al422b ...
0
votes
0answers
52 views

Fuzzy Logic Controller

I want to design a Fuzzy logic controller to control two DC motors of Rover robot , actually I made a simulation for the controller in matlab/simulink and it worked successfully , now I want to ...

15 30 50 per page