Predefined-time sliding mode control: Recent advances and open challenges.

Authors

Saleem Riaz, Wei Wu

Published in

ISA transactions. Nov 04, 2026. Epub Nov 04, 2026.

Abstract

Many engineered systems must reach a target state before a deadline, not merely eventually. A group of agents has to agree before a coordinated maneuver. Finite- and fixed-time sliding mode control (SMC) bound the convergence time, but the bound depends on the initial condition or on an opaque combination of gains. Predefined-time SMC (PTSMC) makes a user-chosen settling-time bound an explicit design parameter. This review synthesizes PTSMC research from 2023 to 2026, supported by a structured search of four major publisher platforms. We group the Lyapunov certificates into four families, review remedies for singularity, chattering and uncertainty, and survey applications, separating simulation from hardware evidence. Open problems are identified in discrete-time theory, noise, actuator saturation, scalability and learning.

PMID:
43015216
Bibliographic data and abstract were imported from PubMed on 12 Nov 2026.

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