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Lv, Maolong (author), Chen, Zhiyong (author), De Schutter, B.H.K. (author), Baldi, S. (author)Prescribed-performance control (PPC) for high-power dynamics with time-varying unknown control coefficients requires to address two open problems: (a) given a Nussbaum function, which properties hold for the power of the Nussbaum function? (b) to avoid high gains, how to design a switching gain that increases only when the tracking error is...journal article 2022