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H-infinity loop-shaping is a design methodology in modern control theory. It combines the traditional intuition of classical control methods, such as Bode's sensitivity integral, with H-infinity optimization techniques to achieve controllers whose stability and performance properties hold good in spite of bounded differences between the nominal plant assumed in design and the true plant encountered in practice. Essentially, the control system designer describes the desired responsiveness and noise-suppression properties by weighting the plant transfer function in the frequency domain; the resulting 'loop-shape' is then 'robustified' through optimization. Robustification usually has little effect at high and low frequencies, but the response around unity-gain crossover is adjusted to maximise the system's stability margins. H-infinity loop-shaping can be applied to multiple-input multiple-output (MIMO) systems. H-infinity loop-shaping can be carried out using commercially available software.〔The MathWorks, Inc. ''(Synthesizing Robust Multivariable Controllers )''. Retrieved September 16, 2007.〕 H-infinity loop-shaping has been successfully deployed in industry. In 1995, R. Hyde, K. Glover and G. T. Shanks published a paper〔Computing and Control Engineering Journal, 6(1):11–16〕 describing the successful application of the technique to a VSTOL aircraft. In 2008, D. J. Auger, S. Crawshaw and S. L. Hall published another paper〔Proceedings of the UKACC International Conference on Control 2008〕 describing a successful application to a steerable marine radar tracker, noting that the technique had the following benefits: * Easy to apply – commercial software handles the hard math. * Easy to implement – standard transfer functions and state-space methods can be used. * Plug and play – no need for re-tuning on an installation-by-installation basis. == See also == * Control theory * H-infinity control 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「H-infinity loop-shaping」の詳細全文を読む スポンサード リンク
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