Hi we are a group of engineering students trying to build a 3 - 6 channel controller for our thesis. As of now, we already have a 6 channel helicopter and an IMU. Since it is really hard to fly a 6 channel heli, we came up with this project. I just wanna ask if anyone here have any experience in building PID(Proportional Integral Differential) controllers for a UAV. I am attaching our presentation in power point so that you'll know what I'm talking about.