Robustness of Eigenstructure Assignment Approach in Flight Control System Design

Robustness and parameter sensitivity issues of eigenstructure assignment approach are investigated. Eigenvalue sensitivity due to parameter variations is formulated as an optimization problem which is solved using a projection algorithm. Good compromise between eigenvalue sensitivity and eigenvector achievability can be arrived. The problem of unmodeled dynamics is tackled using a robustfying procedure. The algorithms proposed are computationally attractive and both yields more transparent designs.