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An Output Feedback Position/Speed Regulator for a Torque–driven Inertia Wheel Pendulum
Jesús Sandoval,Rafael Kelly,Víctor Santibáñez 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.10
This paper presents a position/speed regulator for a torque–driven inertia wheel pendulum where only position measurements are available for feedback. Our contribution is to introduce a controller that does not need joint velocity measurements, and instead it uses the output of a linear filtering of weighted joint position errors to add damping. The proposed controller allows bringing the nonactuated pendulum rod towards its upright position, while the wheel spins asymptotically to a desired constant speed. A complete stability analysis based on Barbashin–Krasovskii’s theorem is presented together with an estimate of domain of attraction. Simulation results upon a torque–driven inertia wheel pendulum model illustrate the performance of the proposed controller.
Output-Feedback Adaptive Control for the Global Regulation of Robot Manipulators with Bounded Inputs
Daniela J. López-Araujo,Arturo Zavala-Río,Víctor Santibáñez,Fernando Reyes 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.1
In this paper, an output-feedback adaptive scheme for the global position stabilization of robot manipulators with bounded inputs is proposed. Compared to the previous output-feedback adap-tive approaches developed in a bounded-input context, the proposed free-of-velocity feedback control-ler guarantees the adaptive regulation objective: globally, avoiding discontinuities throughout the scheme, preventing the inputs to reach their natural saturation bounds, and imposing no saturation- avoidance restriction on the control gains. Moreover, the developed scheme is not restricted to the use of a specific saturation function to achieve the required boundedness, but may involve any one within a set of smooth and non-smooth (Lipschitz-continuous) bounded passive functions that include the hy-perbolic tangent and the conventional saturation as particular cases. Experimental results corroborate the efficiency of the proposed scheme.