0
votes
0answers
5 views

Arduino with two Linear Actuators, two ACS714 Current Sensors, and an L298N Motor Driver setup

I am using the L298N motor driver to drive two HAD1 linear actuators (12V each and a no-load drive current of ~950mA each) Linear Actuator: ...
0
votes
0answers
12 views

Which micro-controler/processor to be used for autonomous stereo vision robot system?

I am very new two robotics, however I have a working stereo algorithm which I want to combine with a SLAM algorithm. I am developing this system for an other application but I decided integrating it ...
1
vote
1answer
21 views

Calculate object distance with camera

Firstly I'm unsure whether this question belongs here or on another SE site (but I'll wing it for now). I've recently been given the job of connecting up a 'smart camera' to a setup where a robotic ...
0
votes
0answers
5 views

EKF Localization when robot is in parallel with a landmark.

I'm facing a real weird problem with EKF Localization. The filer gives me wrong error every time the robot is in parallel with a landmark. I've debugged the code many times but failed to solve the ...
0
votes
0answers
21 views

I need advice for mobile robot navigation

I have built my robot with two servo-motors (with encoders) and ultrasonic sensors , the mobile robot should navigate from its initial point to goal point without collide with any obstacles dependent ...
1
vote
1answer
28 views

Tilt-compensated compass - at my wits' end

I'm a bit at my wits' end here - I'm trying to build a tilt compensated compass for my autonomous sailboat (ardusailor!). I'm using an InvenSense MPU9150. Originally, I used the built-in fusion ...
2
votes
1answer
35 views

Kalman filter Issue - GPS Odometry Fusion

I am working on estimating a robots pose using Odometry and GPS. My first problem is that all kinematic model i have seen for a differential drive robot proposes using the displacement of the left ...
1
vote
1answer
18 views

sparse matrix in EKF SLAM

I've successfully done with EKF Localization Algorithm with known and unknown correspondences that are stated in "Probabilistic Robotics". The results make perfect sense,so I can estimate the position ...
1
vote
1answer
92 views

What type of mechanism is this?

Held and rotated by the knurled ends, one in each hand, the silver spokes rise and fall in order for the assembly to rotate. What is it, some companies' salesmen show tool? Found in an old building, ...
1
vote
2answers
37 views

What is the difference between screw and wrench in rigid body motion?

A screw is defined by a six dimensional vector of forces and torques. It can represent any spatial movement of a rigid body (as written here). But I don't get the following distinction between screw ...
0
votes
2answers
52 views

PD controller in C#

I am currently building a line-following mobile robot. I've done all my image processing work in C#, and now I am in the control phase. I am looking for a PD controller program written in C# to start ...
1
vote
2answers
63 views

Solenoid to launch a ping pong ball

I've been looking for ideas on how to launch a ping pong ball a small distance (< 1 metre) for a game. Solenoids look like they might be useful but I'm not 100% on what force/type I need. I can ...
1
vote
1answer
21 views

Are stereo camera calibration data standardized?

Is there a standard format of how stereo calibration data (various matrices, usually saved in XML) are stored? Can I load calibration data generated say from a OpenCV script in C to another OpenCV ...
0
votes
2answers
31 views

Determing limits of rotation in a robot workspace

How to determine the limit range of end effector orientation (Roll-Pitch-Yaw) at one specific point(XYZ)?I had derived Forward/Inverse kinematic. I'm making a program for 6DOF articulated robot arm so ...
0
votes
1answer
36 views

Visibility Graph Toolbox for Python

I'm searching for a python toolbox/library to do visibility graph based motion planning. I have searched on the internet, but couldn't find anything. I'm probably missing out... Is there any package, ...
2
votes
1answer
37 views

Stereo camera baseline not needed for calibration?

I am doing stereo camera calibration as described in this blog post. I wonder I do not need to input camera baseline for the calibration. The fact probably goes back to some very basic mathematics of ...
-2
votes
1answer
33 views

PC controlled quadcopter using telemetry

Is it possible to control a quadcopter via a computer, using 3DR radio telemetry to connect them?
0
votes
2answers
24 views

IMU based acceleration parameters for differential drive robot

I have a differential drive robot whose motors are virtually quiet while driving on a completely flat surface, but the motors make a lot of noise when on a incline. This is likely due to the ...
1
vote
0answers
21 views

Software to simulate mechanics of production line

Is there any software where I can simulate production line elements (joints, motors, springs, actuators, movement)? For example I want to simulate mechanism to unwind paper from big roll to weld it ...
0
votes
1answer
29 views

Tilt-compensated motor output to keep altitude for quadcopter

The propellers of a multicopter produce thrust. Unfortunately the thrust is the smaller, the more the copter is tilted. I was currently wondering whether there is an established method to calculate ...
1
vote
1answer
31 views

Good method for Retuning a PID After Detecting Oscillation

Given a PID controller with an anti-windup, what are some practical ways to retune the controller once oscillation has been caused and detected? I have access to the magnitude and period of the ...
0
votes
2answers
35 views

I need a software that will help me track passage and identify fish in clear water

I am in charge of studying passage of different species of fish (six species) between lakes in Patagonian Andean range. We've been thinking of deploying video cameras underwater, but we'd need ...
2
votes
3answers
47 views

Robot interaction language

Is there any well documented robot interaction language? I would imagine something like taking a user's speech in English, parsing it using some natural language processing like NLTK or Stanford NLP ...
1
vote
1answer
34 views

Designing compatible spur gears for a robot gearbox

I'm trying to increase the torque on the output shaft of my robot's gearbox. I have a motor with a pinion attached to it with 8 teeth. I want to create a gear with 33 teeth that will mesh with the ...
0
votes
1answer
44 views

Up to what force is a servo motor a reasonable choice as an actuator?

I'm working on an application where I need to apply a linear or angular force to operate a linkage mechanism, but I don't (yet) know what amount of force I will need. I anticipate that it will be less ...
0
votes
1answer
28 views

Android Vibrating based on Arduino devices

I want to make a simple device that causes my cellphone to vibrate for 30 seconds when my phone is 10 feet away from it. How would I go about doing that. How small could I make the device?
1
vote
6answers
61 views

Finding a Hydraulic Actuator to be controlled through a MCU

I'm researching potential actuators I can use on a project i'm doing. I'm designing a creeper (platform for rolling under vehicles) that can lift you up just like the operation of those hospital beds. ...
2
votes
2answers
46 views

Predicting the impact point of a moving object

Suppose we have a moving object (a horizontal projectile motion as one of the most basic examples). Is there any way to predict where it will hit finally? Please note that I'm looking for a machine ...
0
votes
0answers
6 views

How to match Nao head and torso

There are lots of Nao robots here. But everyone randomly swaps around the heads and torsos for no reason. I want to restore them. Is there any way to know what heads and torsos 'belong to each ...
2
votes
0answers
42 views

Repairing non-lubricated linear actuator

I have a Chinese CNC mill (CNC3020T, though several different devices go under this name), and its Z axis was very imprecise, often being randomly off position by as much as 0.5mm. I've disassembled ...
1
vote
1answer
39 views

Is this gear design feasible?

I came up with an idea and am working with a mechanical engineer to design and prototype the idea but I keep sketching out my own ideas in the process and I just came up with this.. I'm quite sure ...
0
votes
1answer
37 views

Why production lines are so huge and power hungry?

I'm thinking of starting my adventure in area of professional manufacturing. When I started to look onto machines I figured out that they are build somehow like in the 70s: huge footprint, big 3kW ...
1
vote
0answers
16 views

Can active sensor data be fed into an Autodesk Inventor Simulation?

I'd like to drive the position of various components within a virtual assembly based on sensor data being collected in real time from an external device. Does Inventor support such a setup? The goal ...
1
vote
2answers
53 views

Electronic Speed Control Concepts

I am a programmer who has never worked with electronics before. I am learning the concepts and hoping to build a quadcopter, with the control software entirely written by me. Motor control seems to be ...
0
votes
3answers
31 views

Best microphone for speech recognition tasks

I made several tests with different setups in order to achieve an acceptable speech recognition quality. It works well when I push a button to activate it but now I want it to be automatically ...
1
vote
1answer
25 views

Current-limiting stepper motors for RepRap

I have been working on a robot project for a while. Now I am tired of finding parts that just does the job, so it is time to do create parts. A 3D printer will do the trick for many parts, but 3D ...
1
vote
3answers
61 views

Manipulator link applied torque

I want to implement a manipulator link using a phisic library. I can only apply some torque to the center of mass, but, i guess, the torque should be applied at the beginning of the link. Shifting a ...
0
votes
0answers
24 views

Please send me to the right site online

I am just looking for a good pdf or site online that will teach me in depth about an RC receiver and how the "motherboard/encoder" works if thats what it is called in the receiver and how it then ...
0
votes
1answer
21 views

Where to go to purchase parts for XY Plotter [closed]

I am trying to build a 2ft square an XY Plotter. I have seen three designs so far: 1)Rack and Pinion 2)Threaded Screw 3) belt-driven. all these use a stepper motor to drive the system. Each one has ...
0
votes
1answer
50 views

Open source autonomous car project

The trend of autonomous cars is on the rise with many professional projects currently underway (to name few - Google driverless car, Mercedes S 500 Intelligent Drive, CMU's Autonomous, few German ...
0
votes
1answer
44 views

Adding external magnets to a DC motor

Is it possible to strengthen permanent magnet DC motors by simply attaching extra magnets on the outside of the motor casing - adding to the magnetic field? If this is not possible, the question ...
0
votes
0answers
46 views

How to calculate robot hand positions using Roll, Pitch angles

i want to calculate humanoid robot hand position with given shoulder roll, pitch angles and elbow roll angle. I'm able to calculate elbow position using rotation matrix which includes shoulder ...
2
votes
3answers
65 views

Controlling a system with PID that resists backdrive

I'm controlling the angular position of a pendulum using a DC motor with a worm gearbox. Mechanically, worm gears are impossible to backdrive. Using a PID controller on a pendulum system with a ...
0
votes
2answers
55 views

Velocity Control via Vibration

I am working on a robot that has an accelerometer. This accelerometer measures the vibration of the robot. When the robot hits a certain vibration, I would like it to slow down in order to reduce the ...
0
votes
1answer
15 views

Making a Gripper Changer for a Robotic Arm [closed]

How do you make a gripper changer for a robotic arm like this? I don't see how you could connect power/control wires or what you use to hold the gripper to the arm.
1
vote
1answer
43 views

Path comparison

Problem: the cartesian position of an end effector (no orientation) of a robot arm is recorded, say, every millisecond (the time steps can not be changed), during a motion. The robot arm is commanded ...
2
votes
2answers
43 views

Maximum likelihood estimator (ML Data Association) EKF

This question is an extension to my previous problem (Data association with ekf). My problem here is in the line 16 in the aforementioned link. 16.     $ j(i) = ...
1
vote
1answer
35 views

Autodesk Inventor 2013: Rounding only at specific edge

I am using Autodesk Inventor 2013 and I need to round a component of a device. I want to round the green marked edges, but not the red marked. But when I click "round", then the bottom edge will ...
0
votes
1answer
17 views

BS2 inconsistant pin state when connected to wire?

I have a BS2 mounted on a Parallax Board of Education Rev D. I was trying to use a wire to determine whether a control was pressed. however, whenever there's a wire connected the state seems to ...
0
votes
1answer
36 views

iRobot Create without ROS?

Is it possible to control the Create without using any ROS whatsoever? I know it has all these serial/Digital I/O pins that connect to ROS which controls it using drivers/libraries. But how hard would ...

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