基于ESO的Buck型变换器趋近律控制 |
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引用本文: | 南余荣,杨晨冰,吕炜杰.基于ESO的Buck型变换器趋近律控制[J].计算机测量与控制,2020,28(3):84-88. |
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作者姓名: | 南余荣 杨晨冰 吕炜杰 |
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作者单位: | 浙江工业大学信息工程学院,杭州 310023;浙江工业大学信息工程学院,杭州 310023;浙江工业大学信息工程学院,杭州 310023 |
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摘 要: | 针对Buck型变换器系统中存在的时变干扰,如输出负载波动,本文提出一种基于扩张状态观测器(ESO)的趋近律控制方法。首先,对系统中存在的时变干扰进行建模,把抑制时变干扰问题转换为抑制匹配和非匹配扰动问题。其次,设计一种扩张状态观测器,用于估计匹配和非匹配扰动。然后,根据提出的新型指数幂次趋近律设计滑模控制器,结合ESO,有效抑制时变干扰对系统的影响,并通过Lyapunov稳定性定理分析观测器的收敛性和闭环控制系统的稳定性。最后,仿真结果验证了所提方法的有效性。
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关 键 词: | Buck型变换器 时变干扰 扩张状态观测器 新型指数幂次趋近律 |
收稿时间: | 2019/7/16 0:00:00 |
修稿时间: | 2019/8/19 0:00:00 |
A Novel Reaching Law Control for Buck Converter Based on ESO |
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Abstract: | In this paper, a new reaching law control method based on extended state observer (ESO) is proposed for buck converter system with time-varying disturbances, such as output load fluctuation. Firstly, the time-varying disturbances in the system are modeled, and the problem of suppressing time-varying disturbances is transformed into the problem of suppressing matched and unmatched disturbances. Secondly, ESO is designed to estimate the matched and unmatched disturbances. Combining with ESO, a new exponential power reaching law sliding mode controller is also designed to suppress the influence of time-varying disturbances for the system effectively. Then, the convergence of observer and the stability of closed-loop control system are analyzed by Lyapunov stability theorem. Finally, the simulation results verify the effectiveness of the proposed method. |
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Keywords: | Buck converter time-varying disturbances ESO new exponential power reaching law |
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