H∞ control and its application to nuclear plant

H∞ control is a multi-variable optimal control in the sense of H∞-norm minimum, and provides a powerful control method of robust stabilization. In the nuclear plant, which is a large-size and complex plant, robust stability of the control system plays a very important role in safe and reliable operation of the plant under various disturbances and system parameter changes. This report includes a solution of the standard H∞ control problem, a design method of H∞ robust-servo-control system and some application examples. (author)