The design of LQG and H/sub /spl infin// controllers for use in active vibration control and narrow band disturbance rejection

This paper develops an H/sub /spl infin// design method for narrow band disturbance rejection. The method is based on the LQG approach via disturbance modelling given in De Nicolao (1992). These LQG and H/sub /spl infin// approaches to the narrow band disturbance rejection problem are then applied to a helicopter active vibration control problem.