International Journal of Control, vol.95, no.10, pp.2815-2827, 2022 (SCI-Expanded)
© 2021 Informa UK Limited, trading as Taylor & Francis Group.In this paper, a self-tuning Robust Integral of Sign of Error (RISE)-based backstepping controller is designed for an electro-hydraulic arm system with a fourth-order system model. The RISE controller, which constitutes the robust part of the control rule, is fused with a backstepping control strategy to cope with model-based and parametric uncertainties. Different from a classical RISE control rule, a (Formula presented.) function is used instead of a (Formula presented.) function to obtain a more smooth control signal. All the gains in the RISE controller are tuned by using continuous update rules. The efficiency of the controller is demonstrated by conducting numerical simulations.