Fu‐Juay Chang

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About

Fu-Juay Chang is a pioneering control theorist whose work has fundamentally shaped the design of variable structure systems (VSS). His primary research focuses on robust control, nonlinear dynamics, and the mitigation of chattering—a critical challenge in sliding-mode control. Chang’s most influential contribution is his 1990 paper, “Adaptive chattering alleviation of variable structure systems control,” which has garnered 71 citations. In this landmark work, he introduced a two-phase adaptive algorithm that first minimizes the reaching time to the switching surface, then actively suppresses high-frequency oscillations, or chattering, that degrade system performance and durability. This innovation bridges the gap between theoretical robustness and practical implementation, making VSS more viable for real-world applications like robotics and aerospace. Earlier, in 1988, Chang laid the groundwork by developing a chattering alleviation algorithm for a specific class of nonlinear systems. While less cited, this foundational study demonstrated the feasibility of smoothing switching control without sacrificing stability. Chang’s work is essential reading for researchers tackling nonlinear control challenges, offering elegant solutions to one of the field’s most persistent problems.