Abstract

This paper investigates stabilization of single-input nonlinear systems by switching between two separate nonlinear feedback controllers. The first, a pseudolinear controller, provides a region of attraction %plane1D;4B0; 0 around the equilibrium manifold. The second controller is high gain, and is designed to drive the state originating in a (larger) set of initial conditions %plane1D;4B0; 1 into %plane1D;4B0; 0. When the state enters %plane1D;4B0; 0, the control is switched from the high-gain control to the pseudolinear control. Simple analytic estimates of both %plane1D;4B0; 0 and %plane1D;4B0; 1 are given. The method is applied in simulation to an acrobot, and in simulation and experiment to a rotating inverted pendulum.

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