scispace - formally typeset
Search or ask a question
Book

Control of Robot Manipulators in Joint Space

TL;DR: In this paper, a case study of the Pelican prototype robot is presented, where the authors present a Lyapunov theory for the dynamics of direct-current motors and demonstrate the properties of the dynamic model.
Abstract: Part I: Preliminaries.- Introduction to Part I.- What Does 'Control of Robots' Involve?.- Mathematical Preliminaries.- Robot Dynamics.- Properties of the Dynamic Model.- Case Study: The Pelican Prototype Robot.- Part II: Position Control.- Introduction to Part II.- Proportional Control plus Velocity Feedback and PD Control.- PD Control with Gravity Compensation.- PD Control with Desired Gravity Compensation.- PID Control.- Part III: Motion Control.- Introduction to Part III.- Computed-torque Control and Computed-torque+ Control.- PD+ Control and PD Control with Compensation.- Feedforward Control and PD Control plus Feedforward.- Part IV: Advanced Topics.- Introduction to Part IV.- P'D' Control with Gravity Compensation and P'D' Control with Desired Gravity Compensation.- Introduction to Adaptive Robot Control.- PD Control with Adaptive Desired Gravity Compensation.- PD Control with Adaptive Compensation.- Appendices.- A. Mathematical Support.- B. Support for Lyapunov Theory.- C. Proofs of some Properties of the Dynamic Model.- D. Dynamics of Direct-current Motors.
Citations
More filters
Journal ArticleDOI
TL;DR: A distributed adaptive control algorithm combined with distributed sliding-mode estimators is proposed for networked Lagrangian systems with multiple dynamic leaders in the presence of parametric uncertainties under a directed graph that characterizes the interaction among the leaders and the followers.

518 citations

Journal ArticleDOI
TL;DR: A unified theoretical framework-based on a general Lyapunov-like function-that, upon slight modification, allows to analyze the stability of all the schemes.

327 citations

Journal ArticleDOI
TL;DR: It is proved that it is indeed possible to achieve stable behavior with simple PD-like schemes-even without the delayed derivative action-under the classical assumption of passivity of the terminal operators.
Abstract: In a recent scheme, with delayed derivative action [Lee and Spong, IEEE Trans. Robot., vol. 22, no. 2, pp. 269--281, Apr. 2006], it is claimed that a simple proportional derivative (PD) scheme yields a stable operation. Unfortunately, the stability proof hinges upon unverifiable assumptions on the human and contact environment operators, namely, that they define Linfin-stable maps from velocity to force. In this short paper, we prove that it is indeed possible to achieve stable behavior with simple PD-like schemes-even without the delayed derivative action-under the classical assumption of passivity of the terminal operators.

273 citations

Journal ArticleDOI
TL;DR: This paper shows that the master-slave teleoperation system is stable under specific linear-matrix-inequality (LMI) conditions by choosing Lyapunov-Krasovskii functional and can be used to compute the allowable maximal transmission delay.
Abstract: This paper addresses the stability-analysis problem for teleoperation systems with time delays. Compared with previous work, communication delays are assumed to be both time-varying and asymmetric, which is the case for network-based teleoperation systems. The stability analysis is performed for two classes of controllers: delayed position-error feedback and delayed torque feedback. By choosing Lyapunov-Krasovskii functional, we show that the master-slave teleoperation system is stable under specific linear-matrix-inequality (LMI) conditions. With the given controller-design parameters, the proposed stability criteria can be used to compute the allowable maximal transmission delay. Finally, both simulations and experiments are performed to show the effectiveness of the proposed method.

206 citations

Journal ArticleDOI
TL;DR: It is shown that this adaptive controller for teleoperators with time-delays will tend to drive to zero the positions of the joints where gravity forces are non-zero, and it is proved that this limitation can be obviated.

194 citations


Cites background from "Control of Robot Manipulators in Jo..."

  • ...where aj are real numbers and bj, cj, dj are nonnegative integers (Kelly et al., 2005; Spong et al., 2005)....

    [...]

  • ...…revolute joints, U(q) is a polynomial function in the arguments qi, sin(qi) and cos(qi), that is, a function of the form P(q) = n∑ j=1 aj n∏ i=1 qbii n∏ i=1 sinci(qi) n∏ i=1 cosdi(qi), (13) where aj are real numbers and bj, cj, dj are nonnegative integers (Kelly et al., 2005; Spong et al., 2005)....

    [...]