Abstract
Novel direct adaptive robust state and output feedback controllers are presented for the output tracking control of a class of nonlinear systems with unknown system dynamics and disturbances. Both controllers employ a variable-structure radial basis function (RBF) network that can determine its structure dynamically to approximate unknown system dynamics. Radial basis functions are added or removed online in order to achieve the desired tracking accuracy and prevent to network redundancy. The raised-cosine RBF is employed to enable fast and efficient training and output evaluation of the RBF network. The direct adaptive robust output feedback controller is constructed by utilizing a high-gain observer to estimate the tracking error for the controller implementation. The closed-loop systems driven by the variable neural direct adaptive robust controllers are actually switched systems.
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Abbreviations
- 2-D:
-
two-dimensional
- DAROFC:
-
direct adaptive robust output feedback controller
- DARSFC:
-
direct adaptive robust state feedback controller
- GRBF:
-
Gaussian RBF
- MIMO:
-
multi-input multi-output
- RBF:
-
radial basis function
- RCRBF:
-
raised-cosine RBF
- SISO:
-
single-input single-output
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Lian, J., Żak, S.H. (2009). Control of Uncertain Systems. In: Nof, S. (eds) Springer Handbook of Automation. Springer Handbooks. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-78831-7_11
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