# What is Uav: Definition and 21 Discussions

An unmanned aerial vehicle (UAV) or uncrewed aerial vehicle, commonly known as a drone, is an aircraft without any human pilot, crew or passengers on board. UAVs are a component of an unmanned aircraft system (UAS), which include additionally a ground-based controller and a system of communications with the UAV. The flight of UAVs may operate under remote control by a human operator, as remotely-piloted aircraft (RPA), or with various degrees of autonomy, such as autopilot assistance, up to fully autonomous aircraft that have no provision for human intervention.UAVs were originally developed through the twentieth century for military missions too "dull, dirty or dangerous" for humans. As control technologies improved and costs fall, their use in the twenty-first century is rapidly finding many more applications including aerial photography, product deliveries, agriculture, policing and surveillance, infrastructure inspections, science, smuggling, and drone racing.

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1. ### Understanding and Tuning Non-Linear PID Controllers for UAVs

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. ### How Do You Convert Drone Position Errors into Roll and Pitch Angles?

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. ### Second opinion needed at UAV Exercise

Homework Statement We're driving with a Uav of 80 km/h The duration Δt is 2 h 45 min On a rainy day, our Uav' is 65 km/h If the distance is the same, how much more is the duration of the drive? So, technically we want the result of Dt = Δt' - Δt Homework Equations Uav = Δx / Δt The Attempt at...
4. ### A Does Kutta Joukowski Theorem applies to Coanda effect (UAV)?

Hi everyone, I am currently working on a Coanda UAV and I am aware that there's no mathematical model to express the lifting effects of Coanda. It is more of a physical description of airflow movement. Correct me if I am wrong! Thus, I am using the generic expression of lift to describe the...
5. ### Coaxial Rotor UAV Helicopter Hover Performance

Hi Guys! I'm doing a conceptual performance calculation and analysis on co-axial rotor UAV helicopter on hover. However, I'm having conflicting results and if anyone can help me, it would be very great. The design constant of the helicopter are as follows: MTOW = 20 kg κ = 1.15 (Induced Power...
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### Where Can I Find a UAV Community Membership with Discounts and Newsletters?

Please can anyone advise of a UAV community that offers a membership where i will receive discounts and newsletters? This is currently a hobby of mine and i don't mind paying fro the service. Thanks in advance.
7. ### Designing a Kite for a Truck Adventure

Hey, I am embarking on a drive to the arctic circle. I have spent a bit of time googling looking for a kite to pull behind my truck to film the adventure and can't find much useful information. Is there anyone that could design or point me in the direction of a place to design a decent kite to...
8. ### Need help on designing a conceptual HALE UAV

Hi everyone, I am a High School student (final year) and am doing an extra-curricular project. Having complete autonomy on what we do the project on, I choose to design a High-Altitude Long-Endurance (HALE) UAV, such as the QinetiQ Zephyr [http://www.airforce-technology.com/projects/zephyr/] or...
9. ### V-Tail and Aileron-Less Design

Hi Physics Community, I'm working on the design of an aileron less and tail engine small UAV (Wing span 800mm) but I got stuck in Stability and Control. I recall from a teacher that a V-tail design is good for those configurations. However, I cannot find references to calculate/estimate neither...
10. ### Can I Build a UAV Drone with an Arduino Uno Board for a High School Competition?

I am building a uav drone for a high school competition and I have the arduino uno R3 board but other websites said I need the ardupilot board. Can I build it with the arduino uno and do you know the materials I would need for the mechanical and electrical aspects of the drone? And if you also...
11. ### Design Mini UAV: Detect Powerline Hotspots- Sensors & Cost

Hey guys. I want to design a UAV that can do mission such as detection of powerline's hotspot. I've no idea what is the best sensors should i use for this mini-uav? I've been looking at FLIR, but it's so expensive. so i think i should create my own sensors or use a cheaper one. Any idea what ir...
12. ### Stability of FuzzyLogic Controller UAV

Hello, I've designed a FLC controller for an UAV and I want to analyze its dynamic stability. In all "Flight dynamics and control" books I've read, the analysis is based on transfer functions of the aircraft (and exemplified on a specific aircraft like Cessna 172) and of the pilot (human or...
13. ### Helicopter UAV - Required Power

Hey guys, I'm currently doing conceptual performance analysis of a UAV helicopter in hover. I'm having some conflicting results however, and if anyone could help me out, that would be great. Here are some of the basic design constants I'm working with: GTOW: 95kg κ = 1.15 (induced power...
14. ### Navigation System of Autonomous UAV

Autonomous UAV usually employ GPS systems for navigation purpose. However, the accuracy of GPS systems lie between 1 to 10 m. If the autonomous UAV has to be employed in applications where the positional accuracy should not exceed 0.5 m, what are the best navigation assisting options available...
15. ### Some questions about a VTOL UAV design

I'm working on a VTOL UAV with some upper classmen and I'm wondering if the design so far will be able to lift off the ground, and how much power (battery power that is) it'll need to hover at about 10 feet for 20 minutes. My concern is with ground effects and the amount of raw power needed to...
16. ### Where to start? Modeling a UAV Control System in Simulink

Hi, I have a small project coming up, based around modeling (and perhaps building) a small Micro UAV system. Its a small device with contra-rotating blades (for stability), and I want to perhaps model the control system using simulink but I really don't know where to start! The aim is for the...
17. ### Practical control parameters for UAV?

Hi, Anyone has had experience with UAV control/signal design can tell me what is the typical flight speed (surveillance UAV), control range, link speed and control delay like? (Sorry, I am not a very good engineering student, furthermore control and signal not my discipline... I can only...
18. ### Designing a UAV: Airfoil Selection Criteria

hi, i am a mechanical engineer currently working on the design of a UAV. Our rough sketch kind of resembles Burt Rutan's Long-EZ or Velocity. I am attaching a couple of sketches of the aircraft which my team and i have constructed using XFLR 5. We will also be using XFLR 5 and Profili for...
19. ### Calculating Variable Acceleration for UAV Recovery

Im trying to calculate the variable acceleration of UAV being recovered on a patrol boat. I have the inital velocity, the final velocity, the mass. In the long run i need this acceleration to calculate the recovery distance. I can iterate a time step for the recovery so time is also known. can...
20. ### UAV Fluid Systems - Question for News Article

Trying to get some background for a potential news article about engineering challenges for aircraft fluid (primarily fuel and avionics cooling) systems – focusing on contrasts between designing for UAVs vs. manned aircraft. Engineers I already talked with have mentioned: designing...
21. ### Launching a UAV - Ideas & Tips

Launching a UAV... Hey guys... Can someone help me to come up with some ideas on how to launch a UAV... Is air pressure launching a better idea than bungee launch? The aircraft weighs around 15 pounds. Is there a better idea? If its pressure launched...woudnt it be air that's used...