Abstract

Publisher Summary This chapter discusses two significant aspects for the black-box identification of the cardiovascular control behavior concerning the heart-rate under physical work-load. The first aspect is constituted by the fact that the behavior of biological systems requires an increased respect for the nonlinear character of their input––output relation. Being confined to linearity, even the most sophisticated identification method is unable to give essentially more contribution for their characterization. Thus, a more simple but conceptually more exacting model can be rather efficient than a very complicated linear one. The chapter discusses the cardiovascular control as a time-invariant polynomial system with a second degree non-linearity. Having assumed time-invariance, the result is obtained from a simple computing evaluation of two response functions obtained by input signals with simple and double magnitude.

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