Adaptive force control of position-velocity controlled robots -- theory and experiment英文教材.pdf
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IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION, VOL. 18, NO. 2, APRIL 2002 121
Adaptive Force Control of Position/Velocity
Controlled Robots: Theory and Experiment
Jaydeep Roy, Member, IEEE, and Louis L. Whitcomb, Member, IEEE
Abstract— This paper addresses the problem of achieving remainder of the section briefly reviews existing force control
exact dynamic force control with manipulators possessing the literature and motivates our work.
low-level position and/or velocity controllers typically employed
The robot force control literature reports two broad ap-
in industrial robot arms. Previously reported approaches and
experimental results are reviewed. A new adaptive force control proaches for the control of robots executing constrained
algorithm for velocity/position controlled robot arms in contact motion: impedance control and hybrid (force/position) control
with surfaces of unknown linear compliance is reported. The [1]. In impedance control, a prescribed static or dynamic
controller provably guarantees global asymptotic convergence relation is sought to be maintained between the robot end
of force trajectory tracking errors to zero when the robot is
effector force and position [2]–[4]. In hybrid control, the end
under exact or asymptotically exact inner loop velocity control.
An additional result which guarantees arbitrarily small force effector force is explicitly controlled in selected directions
e
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