H-infinity loop shaping: Why is it a sensible procedure for designing robust flight controllers?

Presented at GNCC'99, August 1999.

H-infinity loop shaping: Why is it a sensible procedure for designing robust flight controllers?

G. Papageorgiou and K. Glover

Abstract

In this paper, H-infinity loop shaping is motivated as a sensible procedure for designing robust linear feedback controllers. To this end, meaningful guarantees on closed loop behaviour achievable via H-infinity loop shaping design are presented. It also shown how to translate basic control system design specifications into weighting functions. The H-infinity loop shaping cost function is considered from a novel perspective, and a typical design cycle and design strategy are described in detail. Finally, the industrial viewpoint is discussed, i.e.\ the ease with which H-infinity loop shaping controllers can be designed and implemented, and the effort required to learn H-infinity loop shaping.