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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-2026042644-A1, on 12 February 2026. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000002966

Adaptive control method and system for offshore cranes without requiring velocity feedback

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Classification
Lifting, Positioning & Manipulation › Hoists and Cranes
Inventors
LI YIBIN, MA XIN, YANG LING
Assignee
UNIV SHANDONG
Original source
US-2026042644-A1, the United States Patent and Trademark Office, 12 February 2026
Document SHA-256
99dd288c25773e71d8a0c13a19b3a4a3f5c234068fc4f370635b91e4222572c0

Abstract

An adaptive control method for offshore cranes without requiring velocity feedback, in which parameters of an offshore crane system are obtained, and a three-dimensional dynamic model of an offshore crane system is constructed based on ship's roll and pitch motions; a total energy function is constructed based on the three-dimensional dynamic model, and an energy change is described according to a change rate of a total energy of the offshore crane system; based on the three-dimensional dynamic model, auxiliary variables are constructed to replace a velocity signal of a state variable in a controller; based on an inverse trigonometric saturation function and the auxiliary variables, an adaptive controller without requiring velocity feedback is constructed; and the offshore crane system is controlled based on the adaptive controller for control to realize positioning and sway suppression. An adaptive control system is also provided.

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Citation

OpenTechnical Publication OT-2026-000002966, “Adaptive control method and system for offshore cranes without requiring velocity feedback,” published September 15, 2026 at 19:16:26 UTC, https://opentechnical.org/p/OT-2026-000002966.

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