Read about drone | 18 Discussions | Page 1

  1. Y

    Non-linear PID

    Hello, I'm working on a project controlling a UAV (quadcopter) I'm trying to understand non-linear PID controllers. I know that a linear PID is given by: and a non-linear PID the konstant terms are replaced with functions My question is: how to i find these function and tune the paremeters, i...
  2. Y

    Drone position controller

    Hi guys We have a problem we we are building a flight controller for a drone, but fail to understand how to construct the position controller. It takes the x, y positions and the angle in between them which we call yaw. How to compute the angles roll and pitch for the desired x and y positions...
  3. F

    Solving the Rocket Pendulum Fallacy?

    I have been researching the rocket pendulum fallacy and have gotten into some spirited debate on the subject. If I understand correctly... 1. if the thrust is perfectly in line with the centerline (and no outside forces act on the craft other than gravity) it does not matter where the source...
  4. K

    Misc. Generating as much suction with as little weight as possible

    Hello all, as my final project to attain my bachelors, I have tasked myself with designing some sort of device to collect insects from the canopy of soybean plants that can be suspended under a UAS (quad copter/drone). What I am trying to do is essentially build some sort suction device. The...
  5. prashantakerkar

    Calculators Smartphones apps for accessing Quadcopter Drones

    Is it feasible to design and development Smartphones apps which will access,control & monitor quadcopter Drones operating at 2.4 GHz & 9.8 GHz wireless frequencies? Thanks & Regards, Prashant S Akerkar
  6. U

    Blades/propellers - power optimization - drone hovering

    I wonder what is the best figures for blades/prepellers - assuming I am trying to optimize battery life and my main usage for the drone is hoovering. I can not play with the arm length. I do consider 4 blades over 2 blades at the same propeller - not sure if it will help. Any feedback or idea is...
  7. B

    I The total moment when rolling

    Hey, everyone, I have a question regarding quadcopters, when the set of the arms is of configuration X, to roll we increase the velocity of the two motors on the left/right and decrease the other motors on right/left, the question is when doing so the total angular velocity is zero that means...
  8. Joel Graff

    PID control for drone rotations

    Hello, I'm playing around with simulating drones (quadcopters) in Gazebo (an open source robotics simulator). The control system is made up of six PIDs (one for each degree of freedom) and I'm encountering trouble tuning the pids for pitch / roll control. In this case, the linear x / y and...
  9. A

    Air Flow Control Valve System

    Hey, I'm working on a project to build a drone which is powered through air jets. The drone needs a valve control system which can control the flow rate (hence the thrust) going to each nozzle in order to adjust it's altitude and stabilty. I need to set up a circuit which can electronically...
  10. G

    Technology behind camera drones with "follow" function

    Hi. Most modern camera quadcopters (drones) have a "follow" function, allowing them to follow and film a person. The DJI Phantom 4 does this by optical tracking, most other brands require that the person carry a smartphone or other wearable. How does this work? I assume the smartphone or...
  11. S

    Equations of motion for 4 dof

    Hi all, I'm working on a project to control the angles of a beam(purple) with a quadcopter(orange),see figure below. The angles for both the ground-beam and beam-quadcopter will be measured with joysticks, so only roll and pitch angles will be measured and the yaw rotation is fixed. To obtain...
  12. Redbelly98

    New drone is quadcopter-plane hybrid

    I saw this on Yahoo news earlier today. http://news.yahoo.com/belgian-drone-mixes-plane-quadcopter-technology-120407999.html?bcmt=1453122222785-ab7269f0-75d2-46ff-a4ad-24a433f07605&bcmt_s=u#mediacommentsugc_container From the article: The article is sadly lacking any photos of the drone, but a...
  13. S

    XT90 Connector Switch Problem

    I have a battery that connects to a drone via XT90 connection male/females. I want to make a switch to keep the current from transferring to the drone from the battery until I say so (i.e. a physical on/off switch). What would be the best way to do this?
  14. Daren Zomerman

    Airflow on/around quadcopter drone

    Hello, I'm a journalist interested in using an air-quality sensor on a drone, and I'm wondering how the airflow will affect the readings. This would be assuming that I will use a DJ Phantom 2 quadcopter with a GoPro underneath, the drone specs can be found at this link. For the project, we...
  15. C

    Writing: Input Wanted Designing drone army defence for a loosely populated planet

    Setting info - take it as granted. Strategy - treat it as an open issue, if you see an alternative solution, please suggest it. Setting - natural conditions Planet to defend - Earthlike, tidal locked around red dwarf, water world, cold, 3 atm Main weakness point - gates - that allow...
  16. L

    Water/land detection/differentiation from a quadcopter

    Hello, I want to have a quadcopter drone type set up which can tell how far from land it is. I would go for GPS but I want it to take into consideration the tide, and in general I'm only talking a distance of 50-200m (within shore fishing distance). The ideal system would be a drone that can...
  17. M

    Propeller's Thrust

    I would like to know how does the general equation about propellers thrust look like. How should I calculate the force to be big enough for a lift off? The object (a drone) is located in a spacecraft, which means the gravitational force is 0. Are there more variables that I should concern about...
  18. Borg

    News Drone crashes at White House

    Like the Secret Service needs another headache. :oldeyes: http://news.yahoo.com/spokesman-secret-recovers-device-white-house-095128139.html [Broken]
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