【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。更多还原

【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.更多还原