Morphing Wing Structural Optimization Using Opposite-Based Population-Based Incremental Learning and Multigrid Ground Elements

Algorithm 4

Aircraft trimming.

(1) Start with the initial interval of the root angle of attack . It should be noted that the lift of this interval covers

  the given weight of an aircraft; otherwise, find a new interval.

(2) Calculate lift, and at and respectively.

(3) Find , then calculate .

(4) If is sufficiently small for accuracy requirement, then the procedure is stopped. Otherwise, the new interval of

  angle of attack is determined.

(5) If , the new interval is . Set and go to step 3.

(6) Otherwise, the new interval is . Set and go to step 3.