RE: Another College Project
A single axis accelerometer based system will not be able to distinguish "wings level" flight from a banked flight path if there is any yaw involved. Most wing leveling systems I am aware of either employ an inertial platform (gyro) or an optical horizon sensing detector, sometimes in combination with accelerometers.
For a simplisitc ""wing leveler system" I would use a good quality piezo electric or SMM rate gyro mounted so that the gyro axis is tilted towards the rear, say 25-30 degrees from vertical. Mounted in this way the gyro would sense components of both roll rate and yaw rate and would provide some degree of stabilization in both roll and yaw. Following a disturbance in roll or yaw, once the Dutch Roll mode has died out, the yaw rate will be proportional to the bank angle.
Come to think of it this setup will work as is without involving any added PIC.
As a brain teaser, what would happen if the gyro axis was tilted forward (towards the nose) instead of backwards as suggested above?