|Researchers:||Adam Cataldo and Xiaojun Liu|
|Advisor:||Edward A. Lee|
In the future, all aircraft are likely to use fly-by-wire systems, where pilot controls are mediated by computers, rather than being mechanically or hydraulically connected to the aircraft control surfaces. We are designing our control system for fly-by-wire aircraft. The aircraft will carry a three-dimensional model of the earth’s surface, augmented with the no-fly zones. The model will change only when the no-fly zones change. One of our design principles is to give the pilot as much control as possible, subject to the constraint that the aircraft can never enter the no-fly zone.
We have developed several candidate control algorithms for Soft Walls . Our algorithms add a bias to the pilot's control as the aircraft gets near the no-fly zone. The bias is increased and decreased gradually, and the algorithms are provably safe, that is, the aircraft can never enter the no-fly zone. We are now addressing the computational complexity problems that we will need to solve in order to implement such a strategy.
For more information, see the Soft Walls website at
 Edward A. Lee, "Soft Walls: Frequently Asked Questions ,"Technical Memorandum UCB/ERL M03/31, University of California, Berkeley, CA 94720, July 21, 2003.
 Adam Cataldo, "Control Algorithms for Soft Walls," Master's Report, Technical Memorandum UCB/ERL M03/42, University of California, Berkeley, CA 94720, October 15, 2003.
Last updated 11/20/03