A gain scheduling approach in decentralized manipulator control using discretized equivalent joint models

Author

Tumeh, Zuheir S.

Author_Institution

Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

1988

fDate

7-9 Dec 1988

Firstpage

616

Abstract

A decentralized digital trajectory controller for manipulator arms based on a computer torque approach has been developed and tested. A discretized equivalent model of the continuous manipulator system has been derived and used to design digital feedback and compensation filters for this purpose. Time schedules of parameters of these filters were generated offline when the desired trajectory was planned. A stability analysis has been carried out to determine the effect of deviations of the actual trajectory and model parameters from their normal values on the system stability, and the bounds on these deviations within which the control scheme is stable. The control approach has been tested using a hierarchical multiprocessor architecture and a six-joint PUMA 560 robot arm. The performance of the controller is encouraging and compares favorably with the experimental performance of other tested controllers

Keywords

decentralised control; digital control; discrete systems; position control; robots; compensation filters; computer torque approach; decentralised control; digital feedback; discrete systems; gain scheduling; hierarchical multiprocessor architecture; joint models; position control; six-joint PUMA 560 robot arm; stability analysis; trajectory controller; Closed loop systems; Manipulator dynamics; Nonlinear dynamical systems; Nonlinear equations; Processor scheduling; Robot control; Robust control; Stability analysis; Torque control; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 1988., Proceedings of the 27th IEEE Conference on

Conference_Location

Austin, TX

Type

conf

DOI

10.1109/CDC.1988.194383

Filename

194383