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Digital Controllers in Discrete and Continuous Time Domains for a Robot Arm Manipulator (1912.09020v1)

Published 19 Dec 2019 in eess.SY and cs.SY

Abstract: This paper articulates design and performance analysis of digital controllers in discrete and continuous time domains for a single-joint robot arm manipulator. The investigated robot arm system is modeled as a single degree of freedom (DOF) plant and there is a feedback sensor implying a closed-loop system. The design approach incorporates discrete (z-plane) and continuous-time (warped s-plane or w-plane) domain parameters. Four digital controllers - phase-lag, phase-lead, proportional-integral (PI) and proportional-integral-derivative (PID) are theoretically designed and implemented to achieve a phase margin of 40 deg. for the compensated system. For performance evaluations, Bode plots of the compensated open-loop systems and step response characteristics of the closed-loop systems are determined.

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