Systematic approach to selecting H/sub /spl infin// weighting functions for DC servos

This paper proposes an experimental solution for H/sub /spl infin// weighting functions selection by exploiting an experimental planning method which is widely used in quality control. Conducting matrix experiments via orthogonal array, several parameters in H/sub /spl infin// weighting functions can be determined efficiently so that the resulting controller is able to satisfy all design specifications. Of great importance, the proposed experimental method provides additional robust performance property to conventional H/sub /spl infin// control which can only prove robust stability and nominal performance. Velocity controller design of DC servomotors is demonstrated to show the remarkable robustness and superior servo performance provided by experimental H/sub /spl infin// design. A hardware environment is constructed to correlate the theoretical prediction and the measurement data. All specifications of robust stability and performance are validated by the experimental results.<<ETX>>