i am working to develop my own autopilot system for my RC aircraft. i have read many project reports about designing UAV autopilot systems and after searching about that all, i got some question which are listed below...
The IMU provides platform stability in Pitch, Yaw, and Roll. The GPS obviously cannot do that.
Just a thought.
Thank you for your help thomas, i understood the role of GPS and IMU but, what i want to know is that, is it necessary to use IMU with GPS for simple waypoint following autopilot system. i dont want autopilot system to add features like height lock, level lock, pitch adjustment etc. i just my UAV to follow waypoints with rudder control.
Hope U got wat i want to ask !
Some OSD's work this way using only a GPS... You would need a plane that 'self levels' (wing has enough Dihedral, etc), rudder control and i would not even attempt it without some sort of pitch control. The plane would need to maintain altitude to successfully run any type of mission.
This should work out well in most conditions... But windy days, etc.. would also require aileron control for somewhat stable flight (just MY opinion).
Zeeshan I am no expert and I may be wrong but I think you missed the point of Thomas.
True GPS will give you the vector heading, alt with respect to sea level, long. and lat all about the physical location of your UAV but it will not give you the orientation of the UAV. your UAV can be locked by GPS but it might me upside down. IMU will help correct/align you UAV with horizon i.e pitch/yaw/roll your navigation will be dependent on your orientation. Think of it this way GPS unit in a car is the GPS on UAV and IMU is the driver of the car in a sense that he know where he is heading and if the car is pointed to that as well as when to put the pedal. (worst comparision but I think you can relate). I think what this means is that they work hand in hand. Again I am no expert
Can you send me some links or PDF of the thesis about building autopilot systems?
Thanks for the help!!!