基于模糊PI的波浪能液压转化系统平稳控制研究

doi:10.3901/JME.2021.10.267

机械工程学报 ›› 2021, Vol. 57 ›› Issue (10): 267-276.doi: 10.3901/JME.2021.10.267

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基于模糊PI的波浪能液压转化系统平稳控制研究

高红^1,2, 肖杰¹

1. 上海交通大学机械与动力工程学院上海 200240;
2. 浙江大学流体动力与机电系统国家重点实验室杭州 310058

收稿日期:2020-11-03 修回日期:2021-01-28 出版日期:2021-05-20 发布日期:2021-07-23
通讯作者: 高红(通信作者),女,1973年出生,博士,副教授,博士研究生导师。主要研究方向为波浪能捕获与转化发电技术、浮式系统动力学。E-mail:hgao@sjtu.edu.cn
作者简介:肖杰,男,1998年出生。主要研究方向为波浪能捕获系统的数值模拟。E-mail:xiaojie1634021944@sjtu.edu.cn
基金资助:
国家自然科学基金（52075319，51675327）和流体动力与机电系统国家重点实验开放基金（GZKF-2018014）资助项目。

Research on Stabilization Control of Wave Energy Hydraulic Conversion System Based on Fuzzy-PI

GAO Hong^1,2, XIAO Jie¹

1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240;
2. The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310058

Received:2020-11-03 Revised:2021-01-28 Online:2021-05-20 Published:2021-07-23

摘要/Abstract

摘要： 在不规则波条件下对振荡浮子波浪能捕获液压转化系统进行模糊PI控制的研究，建立浮体的非线性动力学模型及非线性液压动力输出系统数学模型，建立基于转速误差信号反馈的马达排量模糊PI控制模型，对不同海况条件进行系统的数值模拟，研究模糊PI控制下波浪能转化系统马达稳定输出的特性，探究有效波高和能量周期对系统稳定输出的影响，模拟东海近岸水域不同观测点该波浪能捕获系统的全年捕获能量及马达输出能量。结果表明采用模糊PI控制器能够使马达输出功率、转速及转矩的不规则瞬变得到控制，马达转速基本保持稳定，功率平稳输出。马达转速及输出功率随有效波高增加而增大，马达排量的调节范围增大。马达转速及输出功率随能量周期增加而增大且增幅逐渐减小，马达排量的调节范围由大逐渐减小。基于东海海况数据对东海近岸9个观测点进行模拟，该波浪能捕获系统的年捕获能量及马达输出能量随着离岸距离增加而增大，舟山岛南部及东南部海域该系统年捕获能量及马达输出能量较高。

关键词: 波浪能, 液压转化, 模糊PI控制, 有效波高, 能量周期

Abstract: Fuzzy-PI control of an oscillating body wave energy hydraulic conversion system is investigated under irregular waves. Non-linear dynamic model of the oscillating floating body and non-linear hydraulic power take off models are established. Hydraulic motor displacement fuzzy-PI controller based on motor speed error feedback is established. Numerical simulation of the system under different sea states are performed. The motor steady output characteristics of the wave energy conversion system under fuzzy PI control are studied. The influences of significant wave height and energy period on the stable output of the system are investigated. The annual captured energy and the motor output energy of the wave energy capture system at different observation points in the nearshore waters of the East China Sea are simulated. The results show that the irregular transients of motor output power, speed and torque can be controlled by using fuzzy PI controller, the motor speed is basically stable, and the power output is stable. The motor speed and output power increase with the increase of significant wave height, and the adjustment range of motor displacement increases. As the energy period increases, the motor speed and output power increase, the amplitude of increase reduces gradually, and the adjustment range of motor displacement decreases gradually. Based on the sea states data of the East China Sea, the energy capture and output of the system at nine observation points near the East China Sea are simulated. Numerical results show that the annual capture energy and motor output energy of the wave energy capture system increase with the increase of offshore distance. The annual capture energy and motor output energy of the system are higher in the south and southeast region of Zhoushan Island.

Key words: wave energy, hydraulic conversion, fuzzy-PI control, significant wave height, energy period

中图分类号:

TK79

高红, 肖杰. 基于模糊PI的波浪能液压转化系统平稳控制研究[J]. 机械工程学报, 2021, 57(10): 267-276.

GAO Hong, XIAO Jie. Research on Stabilization Control of Wave Energy Hydraulic Conversion System Based on Fuzzy-PI[J]. Journal of Mechanical Engineering, 2021, 57(10): 267-276.

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基于模糊PI的波浪能液压转化系统平稳控制研究

Research on Stabilization Control of Wave Energy Hydraulic Conversion System Based on Fuzzy-PI

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