Questions tagged [uav]

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3D path planning for coverage of a given surface

I have a 3D model of a complex object. I have been able to generate all possible points that are around 1 m away from the surface of any part of the object, so the collision is not possible: Now my ...
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How to decide the drag constant of motors?

Hi I'm current working on building an AUV, and I'm calculating the allocation matrix for my dynamic system. But I don't know how to model the drag momentum of motors. I know in UAV, they model it by ...
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Why are Euler angles used for drones

I know this question is asked before, but the reason why was still not clear to me. If you've a 6-DOF IMU, the gyroscope measures is degrees/s or radian/s. Why do we want to convert the body rates to ...
308 views

Air Resistance Drag Force Calculation For Quadcopter

Hello there. Hope you are all doing well. I have created a dynamic quadcopter model on Simulink and designed a controller for it. So far, everything is going well. However, since I am going to be ...
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hope you are all doing well. We are doing a project where a quadcopter is controlled by an ordinary joystick. We have constructed the Control Algorithm and the joystick to move the quadcopter in ...
• 306
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What autopilot options are available for nano helicopters?

I am new to the world of drones and UAVs. While there are a ton of resources available online for quad-copters and multi-copters in general, I am really struggling with finding resources on ...
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Communication method between drone swarm members

I am a doing my FYP in drone swarm anti collision algorithm. The project aims to develop an algorithm to fly a minimum of 3 drones and here are the requirements: 1-the drones can identify the ...
59 views

Universities offering courses about Drones (Unmanned Aerial Vehicles [UAVs]) [closed]

I am trying to gather some information about university courses offered about drones (or Unmanned Aerial Vehicles). At the beginning, I thought that I would have found way more than what I found and ...
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Survey path planning for UAV with high turning radius

I want to perform rectangular area survey. The sensor can either work with very narrow FOV or with wide FOV but requiring very high overlap. My plane's turn diameter is much greater than required ...
46 views

ROS sensor implementation

From this page, there are lots of sensors to be used in ros robots. http://wiki.ros.org/Sensors But, I could not install any of them to the robots in my simulations. For example, I want to install the ...
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1 vote
133 views

Tuning a cascaded attitude and attitude rate PID controller

Assume that I have an object in 3D, and I want to have a controller that stabilizes its orientation (also referred to as "attitude"). To be sure we are clear: attitude is measured in "degrees" or "...
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Proper Joystick Inputs for UAV Quadrotor Control

I am working on the adaptive control of quadrotor UAV in MATLAB/Simulink environment. I prepared some trajectories for the UAV to follow in $x$, $y$ and $z$ directions. I would like to implement these ...
1 vote
45 views

Intel Realsense Cameras for Object Avoidance and SLAM to go to destination

My goal is to make a UAV which can search an area while avoiding obstacles. I figured I would navigate using the SLAM and Intel Realsense D435i (a stereoscopic camera with an IMU built in), but all of ...
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Drone or UAV Platform for deployment of Deep Learning / Reinforcement Learning

Good day, It has been a while since I last posted. I would just like to ask if anyone part of a lab or company doing research on aerial robotics has any suggestions of a good platform for deploying ...
67 views

Why do we connect pins 2 and 3 on APM to enable PPM

Why is it necessary to connect signal pins 2 and 3 via jumper on an APM2.8 board to enable PPM. I am using flysky fs-ia6b receiver with the APM mentioned above. Pins 2 and 3 control pitch and ...
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We all know that the fly time of a quadcopter is proportional to its weight (and the propellers size, etc), and a high capacity battery is heavy, but also a high capacity battery would make the fly ...
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Checking for external compass in mission planner

How can I check whether the external compass is really selected for my APM 2.8 using mission planner. The primary purpose of using the external compass is to have less electro magnetic interference ...
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112 views

Will a 2.4ghz controller work with a 5.8ghz video transmitter?

I’m building an fpv racing drone and I accidentally ordered a 2.4ghz controller and a 5.8ghz video transmitter. Will they work together? I have 5.8ghz fpv goggles so I assume they will work.
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What are the some of the best practices for placing the components (including battery, GPS, flight-controller, wires, receiver etc.) on the air-frame of an 'X' quad-copter to ensure the minimum power ...
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Why 3DR Power Module has two 5v and GND output

Why are there two 5V and GND output in 3DR Power module (https://www.instructables.com/id/Safetly-use-CLONE-APM-Power-Modules/) (https://www.youtube.com/watch?v=M6OSp05Y5b8). Can we power up an APM 2....
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Autonomous quadcopter: How to transform setpoint into motor inputs?

I would like to know how to transform a setpoint to inputs for the motors of a quadcopter. I would like a function like that: ...
267 views

Are all drone propellers compatible with all brushless motors?

I want to build a drone using these motors SunnySky X2212 KV1400 Brushless Motor For RC Drone FPV Racing Multi Rotor and these propellers DYNAM 2X RC Model Airplanes 9x5 Inch Nylon Propellers ...
57 views

How to identificate uav's roll and pitch model and control to track object?

I'm building a drone distance controller for parrot mambo. I need to track a colored page with given distance and given heigth. I can get the yaw information from parrot mambo with 0.5 sec. Since I ...
885 views

How is the IMU used in the PixHawk?

Looking at 3DR's Pixhawk hardware on GitHub the FMU and IMU are treated as different pieces of hardware. On the schematics for the FMUs (example) there is limited reference to the IMU. So, is the IMU ...
6k views

what is the algorithm to get position (Linear displacement and linear velocity ) using IMU (Like MPU6050)?

So I have been working on a drone project for a very long time, now I decided to work on Kalman filter which is used widely nowadays like Ardupilot. I looked at the source code so basically understand ...
199 views

How to implement a novel control algorithm for a drone

I and my research team are working on a novel drone design based on trirotor. The difference between this design and a trirotor is that it has an extra propeller to generate additional thrust, ...
1k views

How many independent control inputs does a hexarotor have?

6, because a rigid body has six degrees of freedom 4, since it is similar to a quadrotor, except with more motors 6, because there are six motors I was taking an online quiz, and I thought option 3 ...
110 views

Position-Attitude Kalman filter with Quaternions

I want to design an EKF to estimate the position of a UAV. If I were doing this with Euler angles then I would have a state vector that would look like \begin{bmatrix}north&east&down&...
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how to write a uav teleop code?

I'm currently working on a teleoperation code for crazyflie. I'm not using a joystick, but I'm using leapmotion and I'm trying to understand how they code for a joystick in order to implement the same ...
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549 views

Generate a coverage path given a polygon region

I'm making an app which controls a drone (DJI) and takes photos. In one particular feature, the user can draw a polygon (let's keep it a convex quadrilateral for now) and the app should generate a ...
293 views

Generation of a trajectory (position,velocity,acceleration) from velocity

I would like to generate a trajectory for a quadrotor UAV and I am using an architecture which allows to do so only by specifying position, velocity and acceleration. I only know that I want to do a ...
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How to convert raw Pitot tube readings to air speed in m/s?

I'm building a kite flying robot, for which I want to measure air speed. So I combined a Pitot tube with an ADC and connected it to my Raspberry Pi using this tutorial. It seems to work perfect, in ...
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How to measure pull force on a (kite) rope?

I'm building a kite flying robot, in which I've already got some sensors built in. I now also want to measure the pulling force on the rope which is attached to the kite. So I thought of attaching a ...
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1 vote
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Possible stabilize Crazyflie 2.0 drone autonomous flight without additional sensors?

I just bought the Crazyflie 2.0 drone. This is my first drone, and it is my first time programming a drone. My first goal is simple: Make the drone hover in place stably for 10 seconds. I found a ...
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1 vote
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How does Amazon ensure its drones are not shot down or captured when in service [closed]

If Amazon plans to deliver packages using drones, how does it ensure the drones reach their destination safely and come back? Won't thieves be able to easily steal packages and drones by shooting them ...
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Utilizing the inertial sensors in an AR Drone

I'm trying to figure out how to use the inertial sensors in an AR Drone to perform a rough version of dead reckoning. I want to move the drone around a room (without flying it) and using the velocity ...
1 vote
70 views

How to precisely land a copter in a defined place? [closed]

Say, I have a flat square landing place for a copter, made of e.g. aluminium or plastic, with marks on it making a square, looking like this from the top: ...
382 views

Will this pseudocode work as a basis for a flight controller?

I'm programming a flight controller on an Arduino. I've researched how other people have written theirs but without notes it's often so obfuscated that I've decided it will be easier and better to ...
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CC3D PWM control signal characteristic (to be simulated by Raspberry PI)

My goal is to control drone by Raspberry PI. The Raspberry PI uses camera and OpenCV, sends control commands to AVR microcontroller which will generate the PWM control signal. Meaning that it will ...
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Estimating the displacement of a drone in three dimensions

Assuming a drone is in two dimension, it has to predict its future position by calculating its future displacement: For a real quad-rotor, why should we not only estimate the displacement of a robot ...
1 vote
2k views

Holonomic and Non-holonomic UAV's: Gliders vs Quadcopters

Good day I would just like to ask if a fixed wing aircraft such as a glider(without thrust capability therefore needs external forces such as air flow to move constraining its movement) can be ...
120 views

Fixed Wing UAV: Do inherently unstable systems desire to be stable for all cases when a closed loop control is implemented on them?

As we all know fixed wing vehicles are designed to have inherent instability which is what enables all fixed wing vehicles to fly. However does this apply to all cases? Do inherently unstable ...
141 views

Vision-based Position Estimation for a quadrotor

As a subtask inside a main project I need to compute the position (x,y,z) of a quadrotor using an homography. To do this I will use a camera (attached to the quadrotor) pointing down to an ...
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How to estimate the position of multiple static ground targets captured from a down facing camera?

An aerial vehicle captures images of the ground using its down facing camera. From the images, multiple targets are converted from their pixel position to the camera reference frame using the pinhole ...
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CC3D - Replacing RC emitter with an RPi

I am trying to control a quadcopter using te OpenPilot CC3D board and a RaspberryPi. The main idea was first replace the signals from the RC emitter to the CC3D RC receiver for an RPi connected ...
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1 vote
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PixHawk or Naza M V2 for Aerial Imaging of Small Study Area with Hexacopter [closed]

I have a project that is going to involve capturing ~80 images of a 35m x 50m agricultural study area for image processing. I am wondering whether to use a NAZA v2 or PixHawk controller to outfit my ...