基于扰动观测器的分数阶终端滑模电液变桨控制方法
Research on fractional terminal sliding mode electro-hydraulic pitch control method based on perturbation observer
王慧 1郭燕冰 1卢胜东 1赵国超 1董正涛1
作者信息
- 1. 辽宁工程技术大学 机械工程学院,辽宁 阜新 123000
- 折叠
摘要
为改善风电机组电液变桨系统的控制性能,文章提出了基于扰动观测器的分数阶终端滑模控制方法.建立风电机组电液变桨系统数学模型,利用滑模状态扰动观测器(SMSPO)对变桨系统参数的不确定性和未知扰动进行实时补偿.采用分数阶微积分理论设计终端滑模控制器的滑模面,在保证有限时间收敛的同时,改善了滑模控制自身抖动.利用Simulink进行试验验证,结果表明,该方法增强了变桨系统的抗干扰能力,削弱了系统的抖动,提高了桨距角的跟踪精度和变桨系统的稳定性.
Abstract
In order to improve the control performance of wind turbine electro-hydraulic pitch system,a fractional terminal sliding mode control method based on perturbation observer is proposed.The mathematical model of the wind turbine electro-hydraulic pitch system is established,and the sliding-mode state and perturbation observer is used to compensate the uncertainty and unknown disturbance of the pitch system parameters in real time.Fractional calculus theory is used to design the sliding mode surface of the terminal sliding mode controller,which can improve the jitter of the sliding mode control itself while ensuring the finite time convergence.Simulink is used for experimental verification,and the results show that the method enhances the anti-interference ability of the pitch system,weakens the jitter of the system,improves the tracking accuracy of the pitch angle,and improves the stability of the pitch system.
关键词
风电机组/变桨系统/分数阶微积分理论/滑模控制/扰动观测器Key words
wind turbine/variable pitch system/fractional calculus theory/sliding mode control/perturbation observer引用本文复制引用
基金项目
辽宁工程技术大学博士启动基金(21-1024)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据