Hi,Implementing PID controller requires calculation of error, integral of the error, and time derivative of the error. Good attitude system (like the DCM that I am using for my quad) usually provides…Continue
Hi,Let's say you have a good attitude estimator (DCM, for example) and you would like to control the attitude of the quad - most of the articles are talking about a PID controller that generates a…Continue
Hi,I am new to this forum, so I apologize if I touch on the topic that was already discussed (however I tried to do the corresponding search on the forum and did not find relevant topics).So, to the…Continue
Somewhere in the corner on the third shelf is the box with my old RC stuff, and in that box was sitting my very, very old Hitec Laser 4 transmitter – 72 MHz, 4 channels, definitely not usable anymore. So, I decided to engage in a project to convert this outdated piece of equipment into a 10-channel DSM2/DSMX transmitter.
The goal was to use the case, existing gimbal assemblies and switches, and to add couple more switches and 2 potentiometers to create a…Continue
Encouraged by the success of my previous custom board (Version 2), which happily carries my quad in the air (maiden flight) with some advanced features like self-stabilization, course lock, control loop operating at 400 Hz, etc., I decided to jump on a more ambitious project - the board with more sensors, more ports, etc.
In summary, the new board (Version 3) has the following…Continue
While working on my new autopilot control board (for quads) I realized that using 6 (or more!) MCU pins just to read data from the RC receiver is too taxing for the MCU as well as for the “real estate” on my board – there should be a better way to communicate with the receiver! A quick search on the Internet brought me to the Lemon-RX UART-enabled receiver (…Continue