0
votes
2answers
10 views

How to calculate Altitude from IMU?

How to calculate Altitude from IMU ? Mathematical equations
0
votes
0answers
8 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
0answers
5 views

Servo controlled valve

I am not sure if the robotics group is right for this question. If not, please kindly direct me to the right one. I am trying to build a servo-controlled water valve. Max pressure 150 psi , valve ...
0
votes
0answers
4 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
8 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 ...
0
votes
1answer
11 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
15 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
16 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 )
0
votes
0answers
17 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
3 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 ...
0
votes
2answers
10 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
31 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
36 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 ...
0
votes
0answers
17 views

What On Line Robot forums, etc. for professional, research and DIY? [on hold]

As a fact question, not opinion on which is good or bad, what are popular On Line Robot forums, teaching site, popular youtube posters, etc. that you yourself watch regularly (fact) for different ...
2
votes
4answers
60 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
0answers
10 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
17 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 ...
0
votes
0answers
14 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
24 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
7 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
45 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 ...
0
votes
1answer
36 views

Free of charge Robot Magazine, Journal, Newsletter or similar [closed]

What free of charge Robot Magazine, Journal, Newsletter or similar publication are available? Either geared toward technical professionals or the general public.
0
votes
2answers
61 views

How to filter vibration programatically?

I'm working on a quadcopter. I'm reading the accelerometer and gyro data out from the MPU6050 and using complementary filter to calculate the roll and pitch values. When the quad is on the floor, and ...
0
votes
1answer
25 views

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 ...
3
votes
2answers
68 views

Why models are not perfect to represent robotic environments?

Sebastian Thrun says in his paper on Particle Filters that - no model however detailed fails to represent the complexity of even the simplest of robotic environment. What does he means by this? Can ...
5
votes
1answer
50 views

Virtual Testing Environment for Drones

Does anyone know of a robotics developer environment ideal for testing AI programs for drones (e.g. quadrocopters, planes, helicopters, etc.)? I would like something like Microsoft Robotics Developer ...
-1
votes
1answer
44 views

Motor control using arduino/raspberry pi [closed]

I'm new to robotics. I would like to know if 56 output lines can be taken from an arduino or raspberry pi?
0
votes
1answer
42 views

Arduino Power Supply

I want to power my Arduino Uno and I know I can do that either by connecting it with USB to PC or with DC power supply.But I want to connect it with a battery source(kindly see the image below) and I ...
0
votes
0answers
27 views

Programming the Odometry of Rover 5

I have started in the programming stage of my project , and my first step is to made and test the odometry of my Rover 5 robot on Arduino Uno by using encoders to determine position and orientation . ...
1
vote
0answers
54 views

Quadcopter: Stabilization along the z-axis (for holding altitude)

I recently spent some work on my quadcopter firmware. The model is stabilizing its attitude relatively well now. However I noticed, that it is changing its altitude sometimes (maybe pressure changes, ...
1
vote
1answer
35 views

Expression used with Rotary Encoders

While I am reading and collecting information about rotary encoders , I faced some troubles about the meaning of some expressions concerned with encoder ,which make me to be confused and stray, these ...
2
votes
1answer
30 views

What laser power for cutting and engraving wood and Acrylic robot baseplates?

Need to buy a DIY/High School grade laser cutter/engraver How much laser power is needed for wood, acrylic (3 to 6mm thick), cutting and decorative engraving? What parameters I need to take care ...
2
votes
1answer
51 views

Machine Vision vs Computer Vision?

I'm trying to understand the core differences between the two topics. Is one simply a newer term? Connotations of automobile vs automation? Something with a screen vs without? I've only ever heard ...
2
votes
0answers
19 views

ROS NavStack with Skid Steering robots

I am migrating from a differential drive design to a skid steering design for my robot, and I want to know how easy would it be to use the NavStack with skid steering. Would there be any problems in ...
1
vote
1answer
40 views

Counts of Quadrature Encoder

Simply ,I had Rover 5 with 2 DC motors and 2 quadrature encoders , I just want to use encoders to measure the distance of traveling for each wheel , In the start, I just want to determine the total ...
2
votes
1answer
46 views

Single-shaft vs Double-shaft motors

I am trying to make a line follower robot and I need help regarding the type of dc motor to use. So we have a single shaft BO Motor and a double shaft BO Motor. Can anyone help me understand what is ...
1
vote
3answers
69 views

Is a Genetic alogorithm suitable for mobile robot path planning?

Regarding my project work, I have to write an algorithm for mobile robot planning. For that, I have chosen Genetic algorithm. Is it good for mobile robot path planning? If it is, then where can I ...
1
vote
0answers
20 views

EKF SLAM and Mahalanobis distance?

So far I have done EKF Localization (known and unknown correspondences) and EKF SLAM for only known correspondences that are stated in Probabilistic Robotics. Now I moved to EKF SLAM with unknown ...
0
votes
0answers
11 views

How to Improve Gait Sequences in an 8 DOF Quadruped? (Video Included)

I am developing an 8dof quadruped with a "mammal" style leg organization, but am having trouble sequencing the servos to create movement with simple patterns. In order to progress forward I need to ...
0
votes
1answer
36 views

it's worth to make a line follower using a raspberry pi and a web cam?

I wonder if this would be a competitive robot compared with one made with a traditional approach using a microcontroller and infrared sensors. I suppose that raspberry can perform an edge detection to ...
0
votes
1answer
22 views

translation the shaft encoder data

I am designing a robot in real world and i want to plot everything in X,Y (Cartesian) coordinates I just want to use the encoders of wheels to determine the current position of mobile robot and its ...
0
votes
1answer
23 views

Robot's parts materials [closed]

I learned some electronics and built some cars but now I want to build something new, I thought about a tiny robot. The first problem I have is it's body. For example, when I build a car I didn't put ...
1
vote
1answer
23 views

Mechanism to oscillate a needle like object in vertical motion

I need to pop out a needle like object(toothpick,matchstick,etc) from a hole in a surface and push it back in automatically.I need to make a array of such needles in which each needle's position can ...
2
votes
0answers
24 views

Torque control and monitoring of servo

I am trying to control the servo motor operation by torque control by interfacing the sensor to an avr , which will continuously monitor the torque value from the sensor and control the torque ...
0
votes
0answers
25 views

ports with std::vector type in Rock (branch master)

I'm trying to attach a port reader in a ruby script to an output port that provides /std/vector < /double >. The output port connects without problems to an input port of the same type, but reading ...
2
votes
1answer
24 views

Dynamic tracking precision of UR5/10

I am willing to use a universal robot arm (UR10) in a path following mode. i.e. I have a desired trajectory for the robot's effector and I would like the effector to follow it as close as possible. ...
2
votes
2answers
40 views

rock/syskit: How to add multiple instances of same component into a network

I've been going through Syskit tutorials at rock-robotics.org. In the tutorials e.g. First composition, there are two different components declared with: ...
1
vote
2answers
114 views

Artificial Potential Field navigation

I've been working on my two-wheeled mobile robot I've been trying to perfect my obstacle avoidance algorithm which is Artificial Potential Field method . Also i use Arduino Uno kit . The basic concept ...
3
votes
2answers
81 views

PID in a system with pole at origin

I've seen in a lot of places some methods of tuning a PID controller. Most of them will say that one should apply a step input to the system and based on that response you can tune the PID parameters ...
0
votes
0answers
36 views

Fast C++ Math libraries for SLAM with many landmarks (simulation done in OpenGL)

I'm using Eigen Library for localization problem so far and planning to move to SLAM soon. I'm not really happy with the performance of Eigen specially, with many landmarks. What are the libraries do ...

15 30 50 per page