0
votes
0answers
2 views

Free of charge Robot Magazine, Journal, Newsletter or similar

What free of charge Robot Magazine, Journal, Newsletter or similar publication are available? Either geared toward technical professionals or the general public.
0
votes
0answers
9 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
10 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
39 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 ...
4
votes
0answers
27 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
36 views

Motor control using arduino/raspberry pi

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
35 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
24 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
38 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
31 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
28 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
42 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
14 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
38 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
42 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
61 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
18 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
10 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
31 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
16 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
21 views

Robot's parts materials

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
22 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
22 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
22 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
18 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
39 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
92 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
1answer
45 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
33 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 ...
2
votes
1answer
22 views

Denavit-Hartenberg parameters for SCARA manipulator

I'm going through the textbook Robot Modeling and Control, learning about the DH convention and working through some examples. I have an issue with the following example. Given below is an image of ...
2
votes
1answer
33 views

Mechanical or electrical engineering for robotic and automation?

I have decided to pursue a career in automation and robotic. At the moment, I am being torn between Mechanical and Electrical Engineering. I know that both of them relate to my choices of career, and ...
1
vote
1answer
26 views

Natural frequency computation (for PID gains computations)

I am currently trying to parametrize the low-level gains of a robotic arm. This arm uses a classical PID for each joint. I am trying to use a method based on computation rather than a ...
1
vote
0answers
19 views

DIY Laser cutter for small Acrylic robot baseplate

Need help to choose desk top, low cost, DIY/High school grade laser cutter for making base plate for DIY robots, about maximum A4 paper size, as this photo. Idea, comment, advises, even if only ...
0
votes
1answer
14 views

Device to roll a mat

I'm looking for some direction on how to create a device that does the following: Imagine you have a yoga mat, I want a device that can roll it up and unroll it without a human intervening in the ...
0
votes
0answers
17 views

Torque calculation

I've got a platic dome (pure semi-spherique) that I want to rotate at a speed rotation of 180 degree by second. It has a diameter about 10cm. I want to use a servo motor like this one HS-422. How ...
1
vote
0answers
17 views

BeagleBone uart/spi/i2c latency

There seems to be consensus here that the BeagleBone Black has 1ms+ latency while toggling gpio pins due to the fact that gpio is handled outside of the cpu. Are the uart/i2c/spi lines equaly slow, or ...
0
votes
2answers
46 views

how to plot a line between two centroids in matlab

I am able to locate centroids of each blocks, but i am unable to join two blocks with a line segment by avoiding the obstacle as shown in the figure. Please need help how do i achieve this using ...
0
votes
1answer
52 views

Matlab for moving a robot towards the detected block

the matlab code is used to detect red colored object, but i want to control a bot to move towards the detected object. just need a simple algorithm or idea, controlling the servo i will be able to do ...
0
votes
2answers
30 views

Position Control of an Omni Wheel Drive Robot

I want to create a robot that will navigate on a desired path! That path can be a straight line or a circular path with a given radius. I will use 3 or 4 omni wheel drive platform and for ...
2
votes
4answers
90 views

How to machine aluminium on a low budget? [closed]

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 ...
1
vote
1answer
29 views

Best technique to built an ejectable drawer? [closed]

I want to build a closet with ejectable drawers. On the top should be 4 buttons, each eject opening one of the four drawers of the closet. I am looking for ideas on how to accomplish this. What kind ...
2
votes
0answers
23 views

Is there a rule of thumb for actuator torque overhead?

When installing a servo or other actuator, I measure the force needed to perform whatever action is needed and find an actuator that can generate more than the necessary force. However, I recently ...
1
vote
1answer
101 views

Exoskeleton Drive System Help [closed]

I am currently working on an exoskeleton. The exoskeleton is going to help kids with cerebral palsy learn to walk 4 years sooner than traditional therapy. Currently we are using 2 Ame 226-3003 with ...
3
votes
2answers
76 views

Cascading PID DC Motor Position & Velocity Controllers

I'm trying to build a robot with a differential drive powered by two DC Motors. First I implemented a PID Controller to control the velocity of each motor independently. Estimated the TF using the ...
1
vote
0answers
21 views

Compact design - building from off-the-shelf components [closed]

I want to build a small cylindrical arm, with a main 360º angular servo on the longitudinal axis, and a secondary angular servo with variable speed in a trasversal axis that rotates with the main ...
4
votes
3answers
79 views

PID Integration over not constant dt (∆time)

Is integration over not constant dt (∆time) a possible thing? Let's say you have a PID loop with differentiating frequency, can the integral part of it still work? (Assuming you know the dt from the ...
1
vote
2answers
91 views

Cheapest centimeter accurate GPS

I am looking for a cheapest possible GPS setup with a centimeter precision without much HW hacking. I am not able to produce my PCB or do any soldering (though I would do that if there is no other ...
1
vote
1answer
31 views

What is the difference between the two different types of Mecanum wheels?

While looking at Mecanum wheels, I noticed that there are two different designs that are popular. One type holds the rollers in between the wheels frame, and the other holds the rollers from the ...
1
vote
1answer
26 views

Stepper does not turn

I always wanted to have a CNC to make PCB quickly at home. Finally, I got a 7x7 kit from zentools recently and put it together. I attached a battery powered screw driver to 2nd shaft of the stepper ...
0
votes
1answer
75 views

autonomous obstacle detecting quadcopter [closed]

Is it possible to build a quadcopter which can detect obstacles and thereby avoiding them in order to reach its destination? If so,how could it avoid the obstacles and how can the destination be set

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