Abstract
In this article, an adaptive output feedback controller is considered for a class of nonlinear systems with integral input-to-state stable inverse dynamics, external disturbance and asymmetric output constraints. A tan-type barrier Lyapunov function (BLF) is introduced to solve asymmetric output constraints. Under the general framework, the designed scheme can be applied to systems with symmetric/asymmetric constraints or without constraint requirements. An extended state observer (ESO) is proposed to estimate external disturbance by defining the disturbance as the generalized system state. Moreover, a reduced-order ESO is designed to establish the error dynamic system. In combination with backstep** technique and linear matrix inequality, it is indicated that the adaptive output feedback controller not only guarantees the global asymptotic stability of the closed-loop system, but also does not violate asymmetric output constraints. Simulation results demonstrate the effectiveness of the proposed control scheme.
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Data Availability Statement
The datasets generated and/or analyzed during the current study are available from the corresponding author on a reasonable request.
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Funding
This work was supported in part by the National Natural Science Foundation of China under Grant numbers [62173207] and [62073187], the Major Scientific and Technological Innovation Project in Shandong Province under Grant number [2019JZZY011111].
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Zhang, J., Yang, J., Zhang, Z. et al. Output feedback control of nonlinear cascaded systems with external disturbance and asymmetric constraints. Nonlinear Dyn 108, 3727–3743 (2022). https://doi.org/10.1007/s11071-022-07440-4
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DOI: https://doi.org/10.1007/s11071-022-07440-4