In this paper, the finite-time regulation problem of robot manipulators under saturated actuator inputs with position measurements only is addressed. A simple saturated finite-time proportional-derivative (PD) plus gravity compensation (PD+) controller is presented, in which the joint velocity is estimated by constructing a simple nonlinear filter. Global finite-time stability is shown by using Lyapunov stability theory and geometric homogeneity technique. The benefits of this design are that the proposed control can be easily implemented and ensures global finite-time stability with bounded control by selecting control gains a priori. Simulations and experimental results illustrate the expected performance of the proposed approach.

Issue Section:
Technical Brief
Keywords:
Motion controls, Nonlinear systems, Robotics, Control
Topics:
Actuators, Control equipment, Degrees of freedom, Feedback, Manipulators, Robotics, Robots, Stability, Design, Gravity (Force), Engineering simulation, Simulation

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