We propose a practical discontinuous feedback control scheme for the r
egulation of joint positions of robotic manipulators. A robust on off
switching control strategy based on a pulse-width-modulation (PWM) fee
dback scheme is proposed for the joint torques. The discontinuous PWM
controller design is carried out on the basis of a suitable controller
designed for an average model which is of continuous nature. Simulati
ons of the closed-loop performance of the proposed control scheme are
presented for a two-link robotic manipulator.