The coaxial compound helicopter (CCH) system has characteristics such as strong non-linearity, significant coupling, diverse flight modes, as well as control redundancy in the transition mode. This paper proposes a variable-bandwidth extended state observer–based improved active disturbance rejection control (VBADRC) s...
This paper investigates the output regulation problem using an observer-based inverse optimal controller within the nonlinear servomechanism framework for asymptotic convergence to desired references and rejection of time-varying disturbances generated by an exosystem. To address the practical constraint of full-state...
The controller for point-to-point (PTP) servo motion control is required to exhibit a high dynamic response, minimal position-tracking error, and robust disturbance rejection capabilities. Conventional cascaded position–velocity–current architectures often fall short in PTP applications due to the delay introduced by...
Active disturbance rejection control (ADRC) is a powerful control method for complex systems, demonstrating exceptional robustness against uncertainties and disturbances. Nevertheless, its observer-based framework exhibits inherent sensitivity to measurement noise, which may lead to amplified high-frequency noise compo...
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