A comparison of linear quadratic Gaussian and central compensators for a structural control

This paper compares performance and robustness properties of linear quadratic Gaussian (LQG) and central controllers as applied to a nonlinear structural vibration problem. A finite element approximation of the structure is used as a foundation for computation of the controllers. We show that the central controller performs better in damping vibrations when no external disturbance is applied to the structure, while the LQG controller damps vibrations more effectively when disturbances are present.