Nonlinear active control of dynamical systems

Traversing hoists – Methods

Reexamination Certificate

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C212S273000

Reexamination Certificate

active

07044314

ABSTRACT:
A control system for reducing cargo pendulation. The control system calculates a correction factor and adds the correction factor for the operator input motions in addition to the motion of the platform in order to provide a reference position of the suspension point of the hoisting cable. The reference position is then provided to a tracking controller so that the crane can be forced to track the needed motions for reducing the cargo pendulation.

REFERENCES:
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patent: 4547857 (1985-10-01), Alexander
patent: 4883184 (1989-11-01), Albus
patent: 4932541 (1990-06-01), Belsterling
patent: 5785191 (1998-07-01), Feddema et al.
patent: 5961563 (1999-10-01), Overton
patent: 6631300 (2003-10-01), Nayfeh et al.

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