Transitioning Vehicles – Looks Can be Deceiving

It seems that everyone is working on some sort of transitioning UAV these days. Combining a fixed wing aircraft and some sort of multirotor seems to be the thing to do. The resulting vehicle combines the multirotor's ease of takeoff and landing with the endurance of a fixed wing UAV. There are two main types …

Top 10 Hints for Designing Drones #5

Understand your failure modes and corner cases. We often see drones designed with too little attention paid to failure modes and corner cases. It's hard to cover all the ‘what ifs’ but once your system is in the market, how well you cover all the exception cases will play a large role in determining your …

Top 10 Hints For Designing Drones #6

Flex is your enemy. It's important that your drone's airframe is rigid. The motors on a drone are very powerful with very fast response times. An airframe that isn't stiff enough will allow its arms to flex, which in turn changes the orientation of the motors. This makes control more difficult and it will increase …

Top 10 Hints For Designing Drones #7

Too often, we see UAV and Drone manufacturers that, when the time comes to test their product, assume that because they’ve done a bunch of flying everything is fine. Unfortunately, there are many assumptions built into how a drone manufacturer operates their drones that their customers may not share. Their customers often won’t operate their …

DGPS vs GPS

The term DGPS is misused quite a bit in the UAV industry. DGPS, which stands for differential GPS, refers to any system that provides corrections to a GPS receiver based on a second GPS receiver at a known location. The GPS receiver providing the corrections is called the “reference station” and the GPS receiver using …

Top 10 Hints for Designing Drones #8

Watch the temperature. All sensors sense what you want plus temperature. This means you should be careful to avoid any sudden change in temperature. While your autopilot will adjust for changes in temperature, accuracy will decrease while the temperature is changing. For example, if you have air vents that allow increased air flow as the …