A new paradigm is the linear parameter-varying ( LPV ) techniques which synthesize of automatically scheduled multivariable controller.
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"' Bode's sensitivity integral "', discovered by Hendrik Wade Bode, is a formula that quantifies some of the limitations in feedback control of linear parameter invariant systems.
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New methodologies such as Adaptive control based on Artificial Neural Networks ( ANN ), Fuzzy logic etc try to address such problems, the lack of proof of stability and performance of such approaches over entire operating parameter regime requires design of a parameter dependent controller with guaranteed properties for which, a Linear Parameter Varying controller could be an ideal candidate.