Sensors for Attitude Estimation

Hello UAV enthusiasts, I recently created a slide deck on the topic of sensors for attitude estimation (i.e. gyroscopes, accelerometers and magnetometers). In these slides, I review Installation considerations, Stochastic models, Bias characterization, Sensor calibration, and Conceptual models. The methods and concepts contained in these slides have been “battle tested”. That is, these are the methods and concepts I used while developing a lightweight autopilot system for UAVs. I hope you find some of this material useful. These slides were part of a graduate course titled “Control of Marine and Aerial Vehicles”. All the best, Matthew silic_uav_sensors_v2.pdf

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RFP: Seeking Cargo Drone Partner for Gates-funded Project in Cameroon

We’re seeking a cargo drone partner for a Gates Foundation Project with the Center for Disease Control and the World Health Organization in Cameroon. Grateful if you could help us share this opportunity: http://bit.ly/2OUh6Av

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XAG Drone Fleets Take Off for Large-scale Cotton Defoliation Operation in Xinjiang

As a global leading agriculture technology company, XAG has initiated its Unmanned Aerial System (UAS) spraying operation – “Take Off for Harvest Time” for the third consecutive year in China’s Xinjiang Uygur Autonomous Region. Since late August, over 1500 drone pilots and 1000 crop protection teams with approximately 3000 sets of XAG P Series Plant Protection UAS have convened in Xinjiang to help local cotton growers spray defoliant and boost crop yields. XAG Drone Spraying Cotton Defoliate in Xinjiang This is the world’s largest cotton defoliation operation that involves the use of fully autonomous drones to ensure a cost-effective, eco-friendly machine harvest. Up to mid-September, one million hectares of cotton fields have been defoliated with XAG’s crop spraying drones. It is estimated that the accumulated service record …

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First BVLOS cargo drone deliveries in Nepal (150+ flights)

Over 150 cargo drone flights have delivered over 1,000 patient samples from 8 remote health facilities to 2 regional hospitals for rapid testing. The best part? The deliveries are being run entirely by Nepali drone pilots & Nepali health experts. Full details and videos here.

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How Drones Fly

I OWN A drone. Maybe you do, too. I use mine to make simple videos and annoy my dog. Drones are quite popular these days, and you can get a nice one without spending too much money. Oh, I’m talking about the remotely controlled flying vehicles with four rotors, not the bigger drones scientists use to study climate changeand stuff. Those cost a lot of money. David Oneal had a DJI Phantom Drone and loved to fly it over the beach. Small drones like mine are easy to fly—a skilled pilot can hover and fly in just about any direction, which makes them great for recording video. But how does a drone actually fly? Ah, this is an excellent opportunity to look at some physics. David …

From http://www.thatdroneshow.com/how-drones-fly/

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From https://lillianheiman.blogspot.com/2019/10/how-drones-fly.html

How drones work?

In this brave new digital world, the word “drone” has taken on some seriously ominous overtones. Mass media portrays drones as cold-blooded mechanizations silently soaring the skies in search of unsuspecting human targets. The general public sees surveillance drones as creepy reminders that someone, somewhere is watching every little thing you do. Drones are indeed powerful weapons and spy tools. But they’re also much more. Although “drone” is the most common term, these flying machines are also often called UAVs(unmanned aerial vehicles). Although government and military agencies were among the first to explore drones for their warfare capabilities, these winged devices are now also marketed to kids, teenagers, RC plane hobbyists, photographers, videographers, farmers and just about anyone who can benefit from a …

From http://www.thatdroneshow.com/how-drones-work/

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Thinking about designing multirotors to optimizing flight time

Designing electric multicopters for a specific flight time is a complex multidisciplinary optimization problem. This short blog post is some of my thoughts on how to think about this problem. Obviously, there so many different ways of doing this and welcome suggestions and other constructive discussions. From an energy conversion standpoint, multirotors is a pretty simple systems. Energy is available from the batteries which is routed via ESCs to the motor and the propeller.  The challenging part is that batteries do not always provide the same efficiency(energy). They are dependent on the power draw (watts,current). For most batteries, the higher the current you draw from the battery, the lower the total-energy available from them. This is mainly due to the internal resistance of the batteries…

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mRo Control Zero Autopilot for Unmanned Vehicles

mRo Control Zero Autopilot — made in USA The smallest and most powerful autopilot in the world of its kind created for unmanned vehicle builders made in USA! A high-performance autopilot, specially designed for advanced/professional users who require the best of the best with minimal space. Built for Builders! “mRo Control Zero”, in its core, is a universal development board and comes fully supported by PX4 and Ardupilot. If you require further customization, the mRo Control Zero will come with all the libraries and examples that will allow you to initialize and access all the board sensors and functions directly via our reference code. Yes, you will be able to create your custom software for this board in no time, no need to worry about initializing…

From http://diydrones.com/xn/detail/705844:BlogPost:3313812

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Drones fall from the sky

Drones are not immune to the whole “What goes up must come down” thing, and their descent is not always planned. If a drone falls out of the sky, the plummeting load can weigh up to a dozen pounds and be accompanied by four spinning rotors ready to rip into, or lop off, anything that gets in their way. David Oneal and one of the founders of the company Indemnis, first saw this problem when working in the film industry, so he, and his team, set out to fix it. David Oneal likes Drones and cameras Since drones have four rotors, if one of them fails the imbalance sends the machine into a high rpm tumble. If the drone just popped out a parachute like the paratrooper …

From http://www.thatdroneshow.com/drones-fall-from-the-sky/

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From https://lillianheiman.blogspot.com/2019/10/drones-fall-from-sky.html

New Gargantuan Internet-Beaming Drone Aims to Succeed

David Oneal says this is cool man! A race is on to build a fleet of solar-powered drones that beam internet down to the Earth beneath them, and the tech titans are dominating this chase—or so we thought. But now that Google and Facebook both have dashed their plans for roaming unmanned internet planes, a lesser known company is partnering with NASA to bring the project closer to reality, according to an IEEE Spectrum report. It is the Hawk 30, a massive 10-engine drone in the vein of previous UAVs made by Airbus and the solar-powered Odysseus plane that can fly for months on end. The product of Japanese tech giant SoftBank and U.S. drone manufacturer AeroEnvironment, the Hawk could soon embark on test flights, …

From http://www.thatdroneshow.com/new-gargantuan-internet-beaming-drone-aims-to-succeed/

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