摘要
针对不使用误差积分器的Boost变换器控制性能提升问题,设计了一种基于扰动观测器(DOB)和自整定的输出电压跟踪控制算法,可应对模型非线性、电路参数变化和负载不确定性。通过更新时变低通滤波器的闭环截止频率可构建自整定律,以提高瞬态跟踪性能。同时,在比例型非线性控制器中嵌入一阶DOB,可实现高性能控制和无静差。搭建了3kW Boost变换器样机,并开展了与传统反馈线性控制器的对比测试,实验结果表明新型控制算法作用下,系统跟踪性能提高了46%,故验证了新算法作用于变换器闭环控制时的有效性。
Aiming at improving the control performance of the Boost converter without tracking error integrator,an output volt-age tracking control algorithm based on disturbance observer(DOB)and parameter self-tuning is designed,which can deal with model nonlinearities and circuit parameter variations,and load uncertainties.By updating the closed-loop cutoff frequency of the time-varying low-pass filter,an auto-tuning law can be constructed to improve transient tracking performance.At the same time,the first-order DOB is embedded in the proportional-type nonlinear controller to achieve both good performance and the off-set-free properties.A prototype of a 3kW Boost converter was built and the comparison tests with the traditional feedback linear controller were carried out.The experimental results show that the new control algorithm can improve the tracking performance of the system by 46%,which verifies the effectiveness of the new algorithm on the closed-loop control of the converter.
作者
李诺薇
邹维科
LI Nuowei;ZOU Weike(School of Physics and New Energy,Xuzhou University of Technology,Jiangsu Xuzhou 221018,China)
出处
《机械设计与制造》
北大核心
2025年第6期326-331,共6页
Machinery Design & Manufacture
基金
江苏省高等学校自然科学研究面上项目(20KJD610002)。
