Three methods to optimize rotorcraft aeromechanical behavior for those cases where the rotorcraft plant can be adequately represented by a linear model system matrix were identified and implemented in a stand-alone code. The first method is to use a Non-Linear Programming algorithm to solve the problem directly. The second method is to solve the full set of non-linear equations which define the necessary conditions for optimality. The third method is to solve each of the possible reduced sets of equations defining the necessary conditions for optimality when the constraints are pre-selected to be either active or inactive, and then to simply select the best solution. The effects of maneuvers and aeroelasticity on the systems matrix are modeled by using a pseudo-random pseudo-row-dependency scheme to define the systems matrix.
Higher Harmonic Optimal Controller to Optimize Rotorcraft Aeromechanical Behavior
1996
142 pages
Report
No indication
English