I used to think that either a GPS or a airspeed sensor was needed to perform centrifugal compensation for fixed wing applications. I noticed that several stabilization devices have become available on the commercial market, so I went back and revisit
I recently figured out a way to use GPS 3-dimensional velocity data and the direction-cosine-matrix information in real time as a plane flies along, to estimate the 3 dimensional wind vector, and the 3 dimensional air speed vector, without a pitot tu
UAV DevBoard Pilots:This topic concerns an efficient way to transfer data through the transmitter of a USART using transmit interrupts.There are two general approaches to sending out a message through a USART. The simplest way to do it, but not the m
UAV DevBoard pilots:Be careful not to press on the pin headers of the UAV DevBoard, especially the gyros.It turns out that is exactly what I have been doing several times a week, for many weeks. I do a lot of programming and I found it convenient to
If you downloaded MatrixNav from this page before 4/29/2009, you should be aware that there is a newer version of the firmware, MatrixNavRv2, that reduces the GPS latency, and will perform much better than the first version.I have been working with P
This is old news for most of you, but not everyone received the memo.There is a maximum safe pulse repetition rate of approximately 40 pulses per second for the most common PWM servos. The uppper limit arises because of the pulse stretcher circuitry
Sooner or later, someone is going to ask about a longer cable to connect their GPS to the UAV DevBoard.I am hoping that, sooner or later, someone will offer a longer cable with the correct connectors, maybe they do already, and I just don't about it.