Nine-degree-of-freedom wave compensation method and system based on visual-inertial fusion

The vision-inertial fusion nine-degree-of-freedom wave compensation method solves the problems of inconsistent planning framework and insufficient perception accuracy in the existing technology, realizes real-time high-precision wave compensation, and improves the stability and operational efficiency of shipborne equipment in complex sea conditions.

CN122411486APending Publication Date: 2026-07-17HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
Filing Date
2026-05-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing shipborne wave compensation technologies lack a unified planning framework, have insufficient sensing accuracy and robustness, and are unable to meet the real-time closed-loop control requirements under complex sea conditions.

Method used

A visual-inertial fusion nine-degree-of-freedom wave compensation method is adopted. Through visual-inertial perception, unified kinematic modeling, end-point compensation target transformation and multi-task planning, the method realizes real-time perception of hull disturbance, generation of compensation targets and multi-degree-of-freedom collaborative allocation.

Benefits of technology

It improves the compensation accuracy, real-time performance, and engineering applicability of the wave compensation system, enhances the position and attitude perception accuracy and robustness, and improves the docking stability and operational safety under complex sea conditions.

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Abstract

本发明提供了一种基于视觉‑惯性融合的九自由度波浪补偿方法,其包括:A、位姿估计;建立坐标系,输出载体七维位姿向量;B、平台建模;建立“船体运动‑并联平台补偿‑舷梯末端输出”之间的位姿传递关系,将船体扰动映射为平台支腿伸缩量和舷梯关节补偿量;C、位姿转化;将舷梯基座相对世界坐标系的运动信息转化为舷梯末端相对基座坐标系的等效补偿目标;D、规划求解;设定主任务和次要任务,建立统一的有界优化模型;采用投影梯度法进行求解;E、执行控制;通过规划求解输出所需目标量,并发送至并联平台驱动器和舷梯关节伺服驱动器,实现协同补偿控制。本发明可同时实现船体扰动的实时感知、补偿目标生成与多自由度协同分配。本发明同时提供了一种九自由度波浪补偿系统。
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