Robotics Stack Exchange
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1500 questions
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3 answers

Tracking Landspeed Underwater

I am hoping someone might be able to nudge me in the right direction (apologies for the long post but wanted to get all the information I have gained so far down. Basically I am after a solution to record the path my vessel took under water for…
OllieRoberts
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Dealing with position inaccuracy and latency in PID Loop

Background: I am new to PID, for my first PID project I am using a simple P-Loop and 300 degree linear potentiometers for position feedback. I am using the roboclaw 2x60A motor controller. The motor controller has 64 speeds between. Sometimes the…
Joel
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Pose estimation, how to populate set of known edges and points?

I am building an estimator that solves for the camera pose relative to a reference frame which contains a known set of features and edges. Currently, the system works with an unscented kalman filter with four known points (red leds) in the reference…
holmeski
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2 answers

Interfacing high-resolution image sensors with ARM Board

I'm working on a project requiring HD (Stereo) Video Processing. Most of High Resolution (5MP+) Sensors use MIPI-CSI interface. I managed to get a board with an Exynos5 SoC. The SoC Itself has 2 MIPI-CSI2 interfaces, the problem is that the pins to…
Roosembert Palacios
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How can I power a wheel but let it spin freely when not under power?

How can I power a wheel but let it spin freely when not under power? I saw the question How can I modify a low cost hobby servo to run 'freely'? but I'm more interested in knowing if there is some sort of gearbox that disengages ( moves to 'neutral'…
cwd
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What is the maximum payload weight for create 2/can I use old create accessories with the Create 2?

I'm attempting to build a heavy platform on the Create 2 but am worried about weight on the platform. What is the maximum weight for the platform and is there an optimum? I have an old create and want to know if any of my existing cables and…
Master Chief
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How to find a solution for quadcopter PID control

I've built a quadcopter and a rig to safely test it on. I'm working on the PID for controlling the roll pitch and yaw. I understand how a PID works on a more simple plant like say a robot with wheels and I'm just really in the dark ( i believe )…
Aage Torleif
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Robot safety standards for software

I am looking for possible ISO standards for robot safety specifically for software. I have come across this presentation that mentions many ISO standards and it's not very clear which exactly applies to software. The most probable ones are: ISO…
Shahbaz
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Choosing motors for 2 wheel drive robot

I am making a 2 wheel drive robot. Suppose I know that my robot is going to weight x kg when finished and I know the diameter of the wheels y (geared motors will be connected directly to the wheels). I can choose from several geared motors and I…
JuliusG
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Is there a place for posting "look at what I did" videos?

Robots are somewhat videogenic, and the old saying "show me, don't tell me" is especially applicable. But of course, a video is not a question, so it doesn't fit the Stack Exchange format. Maybe video links would be more suitable in a CodeProject…
Paul Williams
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Submarine screw and the isolation from the water

How does the submarine prevent water flow through the screw mechanism? The mechanism rotates the screw so there should be a little gap, how come the water doesn't come through this gap in to the submarine?
Developer Marius Žilėnas
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Developing a Quadrotor using ROS

I suppose who know ROS and how it works (at least most of you) I have some question regarding the implementation of a quadrotor in that framework. 3D movements: A quadrotor has 6DOF and moves in a 3D environment. Looking at the various ROS…
Wilhelm
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How to control PID Yaw

My yaw angle varies from -180 degree to 180 degree. -170 170 -135 135 -90 90 …
Earthgod
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Scan Matching finds right rotation but false translation

I'm currently developing a SLAM software on a robot, and I tried the Scan Matching algorithm to solve the odometry problem. I read this article : Metric-Based Iterative Closest Point Scan Matching for Sensor Displacement Estimation I found it really…
PinkPR
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Parameter $r$ of Denavit-Hartenberg

By watching this video which explains how to calculate the classic Denavit–Hartenberg parameters of a kinematic chain, I was left with the impression that the parameter $r_i$ (or $a_i$) will always be positive. Is this true? If not, could you give…
shamisen
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