AIAA Guidance, Navigation and Control Conference, Portland, August 1999.

Quantifying Uncertainty and Robust Performance Using the nu-Gap Metric

Michael Cantoni and Glenn Vinnicombe

Abstract
The nu-gap metric is reviewed as a useful tool for quantifying uncertainty and robust performance within the framework of H-infinity loop-shaping. This metric has a natural frequency-domain interpretation which, combined with particularly sharp robustness results, facilitates the design of weights that appropriately reflect robustness requirements within the H-infinity loop-shaping framework.