0
votes
0answers
6 views

Mahalanobis distance between two orientations

I am performing bundle adjustment and besides minimizing the reprojection errors I have a GPS/INS system providing me input which I want to use as constrains. So far I have added the positional ...
0
votes
0answers
4 views

Using Quaternions to feed a quadcopter PID stabilizing controller to avoid Gimbal lock

I am trying to control my F450 dji quadcopter using a PID controller. From my IMU, I am getting the quaternions, then I convert them to Euler's angles, this is causing me to have the Gimbal lock issue....
0
votes
0answers
10 views

Starting out: Arduino vs Raspberry Pi drone [duplicate]

For my dissertation project, I will have to use a drone. What it will do is look for an object in a closed space. What I will most deffinately need are: A camera Sensors to avoid collision PC ...
0
votes
0answers
10 views

What is LIADAR alternative for indoor RC CAr [duplicate]

I am new to robotics and working on autonomous RC car for indoor purpose only. I was wondering how can I detect expected collision (I am planning to put dummy cars near by RC car). Please guide me if ...
0
votes
0answers
11 views

Create2 incremental encoder rollover method

I have never yet had the Create2's incremental encoder rollover but want to write my code to be prepared for this to happen and test it. When the encoder rolls past 32767 (14.5m), does it rollover to -...
0
votes
1answer
27 views

Can a robot or mechanical part be programmed to exert a specific force

So I was thinking about projectiles that don't need a propellant like gunpowder I've seen coils gun but that's a little out my way. I was wondering if I know the force required to propel a object ...
1
vote
2answers
40 views

Proper naming of PID regulators

I was wondering either there is any special naming for regulators that: Outputs unit is the same as inputs, ie. velocity [m/s] as input and velocity as output [m/s]. Outputs unit is different than ...
0
votes
0answers
11 views

starter kit for learning control systems for quadcopter [on hold]

I'm interested in learning how to code the control systems for quadcopters. There are a lot of systems out there, and I would like to ask for some pointers on a suitable kit with open source code that ...
0
votes
0answers
6 views

SVN repo filtering based on file extensions [migrated]

We have a repository thats been in use for a long time with 23,000 revisions. We have to move this repo to another instance of ours.And during this repo move we have to get rid of certain files due to ...
0
votes
0answers
10 views

Magnetism has north magnets moving to south [on hold]

Its mentioned that north magnetic particles move to south and vice versa. If this be true.what is the proof for it?
1
vote
2answers
26 views

Switch activated by a microcontroller

I'm working on a project where I'm using a voltage that is higher than what most microcontrollers can handle. I'm looking for a kind of switch that will connect a power source to an electromagnet and ...
0
votes
0answers
15 views

Any hardware to support sending 2 way 1080p, 60fps video feed in local WIFI network with low latency

In my robotics, I need to stream 2 way of 1080p, 60fps camera feed in H.264 to the local WIFI network ( for example a mobile phone receives the camera feed), the requirement for the latency between ...
1
vote
2answers
46 views

Covering Up Ultrasonic Sensor

I'm using a basic trig/echo Ultrasonic Sensor with an Arduino Uno. I get accurate readings until I cover the sensor at which point I receive very large numbers. Why is this? Program ...
0
votes
0answers
17 views

L3G4200D gyro raw data to degrees/sec conversion? [on hold]

I've been looking for a formula to convert the raw data from the L3G4200D gyro, connected to my Arduino, to dps but I've not been able to find any formula that has a convincing explanation as well. I'...
1
vote
2answers
40 views

What are the prerequisites for learning ROS?

It is helpful in robotics to first learn about "Linux kernel development" or "device driver development in Linux" before I start learning ROS? I know C and JAVA! In brief, I want to know any ...
0
votes
0answers
11 views

Getting I2C sensor output from Ardupilot to Arduino

I am trying to get the airspeed for ArduPlane from Erle Brain 2 ( Ardupilot) through its I2C port, and send it to Arduino. What I have discovered: There already exists I2C_driver.cpp, and I can use ...
0
votes
1answer
54 views

iCreate 2 with Arduino (Just getting going)

I am new to the iRobot Create 2 but I do know a thing or two about the Arduino (don't assume too much though). However, in this case, I am beyond stumped over what I am sure is something simple but is ...
0
votes
0answers
14 views

Selection of Robotics kit for implementing ROS [closed]

I want to use ROS for pick and place robotics application. I have studied basic architecture of ROS. I have implemented basic publisher and subscriber application. Now I want to start development ...
0
votes
0answers
14 views

IRobot Create 2 wont turn 90 degrees! (JAVA) [closed]

Robot turns 90 or at least close to 90 for the first turn but the more "90" degrees turns it makes, the less accurate it gets. It can turn 90, 100, 80, etc. I am aware of the possible reasons why it ...
0
votes
1answer
50 views

Bldc motors erratic behavior with Arduino program

I've been making my own quadcopter flight controller using Arduino Mega. This is the sample code I wrote in order to test the esc timers and motors: ...
0
votes
0answers
6 views

APM 2.6 response only once after REQUEST_DATA_STREAM

I am trying to get mavlink messages from APM 2.6 via telemetry that is connected to my Ordoid U3 USB port. I am able to read messages when I send the REQUEST_DATA_STREAM message, but it sends them ...
0
votes
0answers
17 views

Controlling arm with hydraulic [closed]

I have an arm controlled using steppers and arduino mega, due to high torque requirement I was thinking of hydraulics, how could I achieve the same with hydraulics with precise positioning and control....
1
vote
1answer
19 views

How does ODE determine contact points in Gazebo?

I was looking at the contact points for the Atlas in the DRCsim package. Each foot has 4 contact points at each vertex of the rectangle. I'd like to know how these points are determined. I've tried ...
0
votes
0answers
23 views

What's new about drone technology? [closed]

In recent years, we've heard a lot about drones. What new technology is enabling these new devices? Why are they making news? When I was a kid, we used to call those things (similar to what we now ...
0
votes
1answer
28 views

Which parts are needed to build a hexapod? [closed]

I want to build & program a hexapod robot which should of course be able to walk (later autonomously, too). My biggest problem is not the programming part, as I have already programmed robot ...
0
votes
0answers
25 views

Which microcontroller should I buy? [closed]

I am an experienced java programmer and I wanna take my coding to the next level by doing some robotics. Which microcontroller should I get? I'm looking for one that preferably is coded by java and a ...
0
votes
0answers
21 views

Regular Web Camera for UV Light? [closed]

I am currently working on a robotics project on odometry using cameras. The prototype I have planned uses webcams and a LASER. But the issue is that LASER can't always be differentiated from the ...
1
vote
1answer
40 views

iRobot Create2: Granularity of drive control?

I own an iRobot create2 on which I am planning to implement a control algorithm. After playing with the different drive commands, I noticed that changing the desired velocity values marginally doesn't ...
1
vote
1answer
18 views

What is the best way to plug in more than 3 stepper motors into a Arduino Uno board?

I'm developing a 5 axis robotic arm with stepper motors and I am getting around to ordering most of my parts. I plan on using 5 EasyDriver shields to drive all of my motors. I am also planning on ...
0
votes
4answers
67 views

Detect physical touch/hit

I'm making a target to an outdoor robot competition. The target should detect if some of the robot got touched or got an hit automatically. and the target can get hit 360 degree. I'm searching ...
0
votes
0answers
24 views

Disable MAVLINK Heartbeat Using Telemetry

I am using an APM 2.6 that is connected to an Odroid USB via Telemetry port (UART to USB). I am trying to get MAVLINK messages without the need to keep sending a HEARTBEAT message. If I switch to ...
5
votes
3answers
96 views

PID with position and velocity goal?

I'm trying to design a control system for a robot that tracks moving object. Thus I want to robot to match the position and velocity state of the object. I don't want robot to simply to arrive at the ...
1
vote
1answer
50 views

What kind of torque is needed for a small 5-6 axis robotic arm?

I'm new to robotics and I'm looking to make a 5-6 axis robotic arm out of stepper motors but I honestly dont know how much torque I should have for each part. Below I have described in more detail ...
1
vote
2answers
34 views

How to create a model for temperature control?

I have a heated compartment, inside which, there is another object heated up by independent heater. I want to control temperatures of both chamber and the object. I could achieve this by simple PID (...
0
votes
0answers
25 views

How to decide the torque of the motor and the gearbox ratio for a robotic arm? [duplicate]

How to decide the torque of the motor and the gearbox ratio for a (say 6 DOF) robotic arm, having a 5 kg payload capacity for instance. I am mainly concerned about the inertial mismatch. How do I ...
0
votes
0answers
14 views

How to preprogram iRobot Create 2 [duplicate]

I want to program a set path for the iRobot to follow without having to be tethered all the time to my computer. What is the best way to do that?
1
vote
0answers
32 views

SLAM - odometry motion model

I am making a project with a 4 wheeled differential robot to make visual SLAM using a stereo rig. I have some encoders to measure de displacement and the steering angle of the robot and I want to use ...
1
vote
0answers
57 views

Visualizing raw accelerometer and gyro data

I have an arduino wired to an MPU6050 breakout board. The arduino continuously collects accelerometer and gyroscope data from the MPU6050 and calculates angle and velocity. Simply plotting the ...
0
votes
1answer
46 views

How to use the opcode to start?

I am new to robotics.Recently came into contact code.So the teacher let me use the Serial port app for Android to enter the opcode.But the robot did not have any reaction. I use the Communications ...
1
vote
1answer
12 views

Is there a way to combine and sync two 2K cameras @ 90fps with ICs

I am searching for a way to minimize the size of a stereo vision module and cannot find any ICs that will combine and sync two MIPI CSI-2 (4 lane) data streams without an FPGA and too much code. ...
0
votes
2answers
59 views

Ultrasonic Sensor through a column

I am trying to measure the height of water inside a column. The column is 50mm in dia and 304mm long. I have mounted the sensor just above the column. To measure the accuracy of the sensor, I ...
0
votes
0answers
7 views

Hubsan x4 drone camera recording black

I'm unsure if this is the correct community to ask this question (vs StackExchange Electronics or Aviation, for example), but I recently purchased a Hubsan x4 HD video drone from Amazon. This is my ...
0
votes
0answers
22 views

Storing a 3D map

I am trying to build a 3D map using two cameras. I have found the coordinates of all the objects. What is the best way to store this data.I would also like to display this map later. My range will be ...
0
votes
1answer
26 views

How can I charge a 11,1 volt LiPo akku?

I didn't found any modules to charge my 11,1 volt LiPo akku, only for 3,7 volt with 5 volt power supply. How can I handle that with a micro-USB connector on my robotplatform?
1
vote
3answers
147 views

Arduino or Raspberry Pi?

I want to make a object tracking quadcopter for a project. While I'm using the Arduino Mega 2560 as the flight controller, I was thinking of using an additional offboard microcontroller/board for ...
0
votes
1answer
18 views

Locking the yaw direction of a laser pointer

I have a laser pointer on a handle grip and I'm trying to keep the laser pointer's yaw direction, which can rotate at around 10deg/s. So I have the laser pointer on a stepper motor and an ...
0
votes
0answers
16 views

Send Quad copter control signals from Arduino or Raspberry PI to receiver on Open pilot CC3d

I have open Pilot CC3D attached to a receiver which can accept signals from a RC transmitter after configuration through GCS .. Objective is to - Send these control signals ( YAW/THROTTLE/ROLL/...
3
votes
1answer
49 views

Task space to joint motion space conversion

I am the moment trying to read and understand this paper Task Constrained Motion Planning in Robot Joint Space but seem to have a hard time understanding the math. The paper describes how to ...
0
votes
3answers
49 views

How are industrial robotics components purchased?

For hobbyists, you go to a store to buy products. The prices for these products are all clearly listed in the store catalog, and you can easily search for parts by lowest price or read customer ...
0
votes
0answers
6 views

problem with vex updating

Hi I am having a problem with my vex robot updating system. Right now I am using VEX IQ Firmare Update and my mac states that everything is up to date. However when I look online there is a new ...

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