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Multibody System Dynamics

, Volume 42, Issue 1, pp 1–17 | Cite as

Real-time trajectory control of an overhead crane using servo-constraints

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Abstract

In this paper, the system dynamics of an overhead crane are inverted by servo-constraints. The inversion provides a feedforward control for trajectory tracking of the system output. The overhead crane is inherently underactuated and modeled as a two-dimensional mechanical system with nonlinear system dynamics. Actuators are modeled as first-order systems to simplify implementation and account for velocity-controlled drives. The control based on servo-constraints is shown to be an effective method of trajectory control for overhead cranes. It will be demonstrated that the formulation is solvable in real-time using linear implicit Euler integration. The feedforward solution is made robust by an augmentation with LQR as well as a sliding mode controller. Experiments are conducted on a laboratory crane of 13 m motion range.

Keywords

Servo-constraints Feedforward control Overhead crane Trajectory tracking Underactuated systems 

Notes

Compliance with ethical standards

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.Institute of Mechanics and Ocean EngineeringHamburg University of TechnologyHamburgGermany

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