---
publication_id: "OT-2026-000002966"
title: "Adaptive control method and system for offshore cranes without requiring velocity feedback"
published_at: "2026-09-15T19:16:26.674186Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000002966"
categories:
  - "lifting-positioning-manipulation/hoists-and-cranes"
keywords:
  - "b66c13/16"
  - "b66c13/48"
  - "b66c13/48"
  - "b66c13/48"
  - "b66c13/06"
  - "b66c13/063"
---

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

## 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.