doctoralThesis
Controle com adaptação em modo dual utilizando uma rede RBF
Fecha
2016-09-01Registro en:
OLIVEIRA, Odailson Cavalcante de. Controle com adaptação em modo dual utilizando uma rede RBF. 2016. 94f. Tese (Doutorado em Engenharia Elétrica e de Computação) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2016.
Autor
Oliveira, Odailson Cavalcante de
Resumen
This work presents a control strategy using a network with radial basis function
(RBF network) with adaptation in dual mode. The objective of the strategy is to use the
approximate capacity of the RBF network to control nonlinear systems with unknown
parameters or with uncertainties. The proposed control uses the structure of Model
Reference Adaptive Control (MRAC) and a RBF network whose parameters are adjusted
in real time in dual mode, which will allow a fast transient and a smooth control signal
in steady state. The dual mode adaptive method of RBF network parameters uses the
hyperbolic tangent function, which during the transient provides a similar behavior to
variable structure control, and integral laws of MRAC that are regulated by a hyperbolic
secant function during steady state. A hyperbolic tangent is used instead of signal
function what reduces the chattering phenomenon. A hyperbolic secant is used to
regulate the integral law, increasing its effects on steady state and reducing on transient
time. It is presented a Lyapunov proof for dual mode method and comparisons through
simulations.