摘要
针对Buck型DC-DC变换器的滑模控制存在收敛速度慢、产生抖振等问题,设计一种新型的滑模预测控制方法。该方法应用矩阵变换和Schur补引理等技术,将滑模控制律的设计转化为优化问题,避免控制律的切换,从而抑制滑模控制的抖振现象,且由于优化过程能充分利用控制能量,使得输出能够更快收敛。变换器的线性化模型和非线性模型的仿真结果表明,所提出的控制方法不存在抖振问题,且相较于单纯的滑模控制、预测控制和已有的滑模预测控制,提出的滑模预测控制方法调节速度分别提升76.9%、52.0%、20.0%,负载突变后电压超调量分别减少73.2%、71.8%、52.6%,具有更快的调节性能和更强的鲁棒性。
Aiming at dealing with slow convergence and chattering in the sliding mode control of Buck DC-DC converter,a novel sliding mode predictive control is designed.It transforms the design of the sliding control law into that of optimization,using the techniques of matrix transformation and Schur complement lemma,thus avoiding the switching of the control law,and successfully suppressing the chattering of the sliding mode control.Moreover,the optimization process fully utilizes the control energy so that faster convergence of the output is achieved.Simulations of the linear model and the nonlinear model of the converter show that the proposed sliding mode predictive control produces no chattering,and comparing with the simple sliding mode control,predictive control and existing sliding mode predictive control,it increases the adjustment speed by 76.9%,52%,and 20%respectively,reduces the voltage overshoot in a sudden load change by 73.2%,71.8%,and 52.6%respectively,and presents faster regulation performance and stronger robustness.
作者
王勇
高海燕
WANG Yong;GAO Haiyan(School of Electrical Engineering&Automation,Xiamen University of Technology,Xiamen 361024,China)
出处
《厦门理工学院学报》
2022年第3期18-23,共6页
Journal of Xiamen University of Technology
基金
福建省自然科学基金项目(2019J01868)。
作者简介
通信作者:高海燕,女,讲师,博士,研究方向为飞行器制导与控制、预测控制,E-mail:2015000042@xmut.edu.cn。
