A novel anti-disturbance fast terminal sliding mode method based on DC-DC boost converter

针对DC-DC升压变换器的新型抗干扰快速终端滑模控制方法

¹ School of Automation, Northwestern Polytechnical University, Xi'an 710072, China
² Xi'an Institute of Applied Optics, Xi'an 710065, China

Received: 14 March 2024

Abstract

In order to stabilize the bus voltage and match the power demand, this paper proposes a new fast terminal sliding mode control strategy to enhance the system's anti-disturbance ability for the DC-DC boost converter. Firstly, a full order sliding mode surface is proposed to ensure finite time convergence of the system state, and an integral type switching control term is proposed to handle large disturbances. Then, perturbation observation is used to calculate system uncertainty which further enhances robustness and reduces chattering. Next, a parameter update mechanism is proposed to calculate the model parameters of the current working point, which helps to improve control performance and enhance flexibility in dealing with different working conditions. Finally, the effectiveness of this method is verified through simulation.

摘要

为了稳定母线电压并匹配功率需求, 以DC-DC升压变换器为研究对象, 提出了一种新的快速终端滑模控制策略, 来增强系统的抗干扰能力。采用一个全阶滑模面保证系统状态的有限时间收敛, 并利用一种积分型切换控制项处理系统扰动; 使用扰动观测器估计系统的不确定性, 从而进一步增强鲁棒性, 减少抖振; 提出了一种参数更新机制计算当前工作点的模型参数, 这有助于改善控制性能并提高应对不同工况的灵活性; 通过仿真验证了所提方法的有效性。