Prescribed time adaptive fault-tolerant control of direct-drive wave energy converter system

IF 4.1 3区工程技术 Q2 ENGINEERING, MECHANICAL

Probabilistic Engineering Mechanics Pub Date : 2026-10-01 DOI:10.1016/j.probengmech.2026.104039

Shizhan Dong, Zhongqiang Wu, Zijian Zhang

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引用次数: 0

Abstract

A prescribed time adaptive fault-tolerant controller is designed for the problem of maximum power point tracking in Direct-Drive Wave Energy ConverterSystem (DWECS), considering actuator fault, internal parameters change and external disturbances. First, the model of DWECS with external disturbances is established, and the actuator fault, system parameters change and external disturbances are regarded as lumped uncertainties. An adaptive fault-tolerant controller based on backstepping method with prescribed time theory is designed to meet the requirements of rapidity and stability for maximum power point tracking control. By designing the prescribed time observer, the lumped uncertainties can be estimated accurately in the prescribed time, and introduced into the controller to compensate for them. The prescribed time adaptive fault-tolerant controller does not depend on the initial state of the system and the parameters of controller, and the system can still maintain the maximum power point tracking and achieve the prescribed time stability.

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直接驱动波能转换系统的定时自适应容错控制

针对直接驱动波能转换系统（DWECS）的最大功率点跟踪问题，考虑执行器故障、内部参数变化和外部干扰，设计了一种规定时间自适应容错控制器。首先，建立了考虑外部扰动的DWECS模型，将执行器故障、系统参数变化和外部扰动视为集总不确定性；为满足最大功率点跟踪控制的快速性和稳定性要求，设计了一种基于时间理论的逆推自适应容错控制器。通过设计规定时间观测器，可以在规定时间内准确估计集总不确定性，并将其引入控制器进行补偿。规定时间自适应容错控制器不依赖于系统的初始状态和控制器参数，系统仍能保持最大功率点跟踪，达到规定时间稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Probabilistic Engineering Mechanics 工程技术-工程：机械

CiteScore

3.80

自引率

15.40%

发文量

审稿时长

13.5 months

期刊介绍： This journal provides a forum for scholarly work dealing primarily with probabilistic and statistical approaches to contemporary solid/structural and fluid mechanics problems encountered in diverse technical disciplines such as aerospace, civil, marine, mechanical, and nuclear engineering. The journal aims to maintain a healthy balance between general solution techniques and problem-specific results, encouraging a fruitful exchange of ideas among disparate engineering specialities.