First a few words on INS...INS or Inertial Navigation System is used in Missiles, Airplanes (commercial and Military), UAVs, Autonomous vehicles, etc. to calculate real time velocity and distance from a given origin.
Consider a helicopter lying at (0,0) of your co-ordinate axis, you wish to make it fly autonomously to (x,y). How will u do it?well ull need a strapdown-INS system. As the helicopter will take off, your accelerometer will start giving you a reading, which u must convert to digital ( i used in built 10 bit ADC of ATmega32), then integrate with respect to time, and get real time velocity, integrate again to get real time distance....
In the pic u can see the accelerometer, ATM32 and an 16x2 LCD for displaying velocity and distance....i will be uploading the algo shortly....
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