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Questions tagged [uav]

UAV means "Unmanned Aerial Vehicle". UAVs, commonly known as drones, are either controlled autonomously by computers in the vehicle, or under the remote control of a navigator, or pilot on the ground or in another vehicle.

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How often is FPGA used for UAV flight control? [closed]

I need to design a flight controller for a UAV. I searched the internet and found that FPGAs are mostly used for communication (encryption, decryption etc.) and feature extraction. To me it seems that ...
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2answers
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UAV-towed gradiometer: magnetic signal decay with water depth

I want to use an unmanned aerial vehicle to tow an airborne gradiometer. Goal is to detect historic anchors buried in the sea floor. What is the effect of (sea)water depth on the magnetic signal? Any ...
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1answer
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Compensating for MEMS Gyroscopic drift

I'm new to IMUs and know that they are prone to high drift, which depends on Temperature, White Noise and Time, but the most uncertain drift is caused by time, and under certain circumstances, drift ...
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3answers
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Finding true north in UAVs

In my application, I need to find true north direction, for reference purpose. I am having a GPS enabled drone. I have searched over Internet and found that moving in the north direction while keeping ...
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1answer
273 views

How to implement a BLDC for variable torque in its phase (InstaSPIN, TI)

By chance I read this patented method to control the rotor pitch without a swash plate usually a helicopter, by adding two parallel hinges on each blade root. When add torque to spin it the pitch ...
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1answer
681 views

Electronic hit detection

I'm building various r/c vehicles like warplanes, tanks, auto-turrets, etc. and I want to fit some of them with some kind of a weapon. I've decided an air soft gun is a good choice. So, mounting and ...
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2answers
719 views

Quad copter - from PID values to motor power

I am struggling with a completely self built/written quad copter I am working on. I am working on the PID controller for balance, right now just with a P value and it only reacts on ROLL and PITCH ...
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1answer
68 views

Can you implement a control algorithm and send the inputs via xbee?

I know this question is little bit vague, but let's say that I have a robot or a quadrotor to control. I want to implement the control algorithm (PID, robust, or LQR) in the PC not in the robot/quad, ...
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1answer
256 views

Will this ESC work with these motors?

I am looking in to making a UAV quadcopter and I don't know how to calculate what ESC to use with the motors I have picked. I am looking at buying the HobbyKing Red Brick 10A ESC and the Turnigy ...
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2answers
637 views

How do IR rangefinders accomplish centimeter precision without high speed / high cost parts?

I'm currently working on a system that requires an RF rangefinder with ~15 cm precision, over a range of about 50 meters. My research into the field has shown that I'll need complex and expensive ...
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1answer
820 views

How can an experieced programmer get into embedded programming and robotics [duplicate]

Possible Duplicate: How to become an embedded software developer? I would like to know what is the best method to begin learning embedded programming and electronic skills? I am already very good ...
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1answer
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Arduino + gyro/accelerometer == flight controller …?

Can I use the combination of an Arduino Mega + MPU-6050 gyro/accelerator module instead of a flight controller? Is there something else needed? It is said that the gyro/acceleration can be used to ...
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2answers
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Extracting images from a camera in real-time

Me and a group of students are building a UAV and we want to put a high quality camera in it (i.e. a decent ~100mm zoom lens) and interface the imagery with on board processing. I have looked around ...
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674 views

Hacking the ArduCopter Software

I'm interested in using software from diydrones.com specifically written for UAV helicopters called ArduCopter. However, the instructions on the website assume that you've bought the specialty ...
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7answers
5k views

How do I implement accurate distance measuring (to ground) on a plane-like UAV for heights over 10m?

How do I implement drone-to-ground distance-measuring for autopilot landings for heights over 10m? I found ultrasonic to be too inacurate, let alone GPS. Maximum height is 1000m, Vmax is 100 km/h, ...
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2answers
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How accurate are altimeters?

I'm building a quadrocopter and would like to prevent drift using a down facing camera. To do this properly, I need to get the height of the drone from the ground. Obviously the ground can vary, so ...
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3answers
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Stopping drift in hovering quadrocopter

I will be building a 4 propeller quadrocopter drone at some point. I want to make it relatively easy to fly by getting it to hover still when the controls are not touched. Can someone offer some ...
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3answers
552 views

Want to make a UAV

I've been inspired by the guys at DIY Drones and I'm toying with the idea of making a UAV. To transmit the sensor data, I was thinking I'd go with a 60mW XBee, but I also would like to transmit live ...