FLIGHT CONTROL APPLICATIONS OF L(1) OPTIMIZATION

The l(1) optimization method is used to handle tracking issues in the design of discrete flight controllers for a single-input/single-output aircraft longitudinal control problem. The l(1) optimization approach is discussed theoretically and on a broad conceptual level. Constrain ts are developed to handle control deflection and rate limitations, ov ershoot and undershoot limitations, and steady state error requirement s, The effect of each constraint is evaluated with simulations of the aircraft model. A closed-loop model-matching design is also presented, which produces acceptable tracking results with a lower-order control ler.