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| 摘要: |
| 基于非线性微分几何理论,提出了一种基于精确反馈线性化的定频PWM滑模变结构控制策略.应用脉冲波形积分法建立电感电流连续(CCM)开关变换器的仿射非线性系统模型;在满足精确反馈线性化条件下,采用状态反馈精确线性化方法,推导了非线性坐标变换矩阵和状态反馈表达式,实现了变换器的线性化.以线性化后的布鲁诺标准型为新被控对象,采用指数趋近律设计了滑模控制器.仿真结果表明:该方法不但比传统PI控制具有更好的稳态特性、更快的响应速度、更强的抗干扰能力,而且优于基于微分几何的最优控制策略. |
| 关键词: 滑模控制 反馈线性化 Buck开关变换器 脉宽调制 非线性微分几何 |
| DOI： |
| 分类号:TM46 |
| 基金项目:国家高技术研究发展计划(863计划)，国家自然科学基金-中国工程物理研究院联合项目，西南交通大学博士研究生创新基金? |
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| Fixed-frequency PWM sliding-mode control of buck switching converter based on precise feedback linearization |
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MA Hongbo FENG Quanyuan
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| Abstract: |
| According to the nonlinear differential geometry theory,a fixed-frequency-PWM sliding-mode variable-structure control based on precise feedback linearization is proposed for DC-DC switching converter.A nonlinear affine model of Buck converter working on CCM(Current Conduction Mode) is set up using the impulse integral modeling method.On the premise of precise feedback linearization,the state feedback linearization is used to derive the nonlinear coordinate transformation matrix and state feedback law,and to... |
| Key words: sliding-mode control feedback linearization Buck switching Converters PWM nonlinear differential geometry theory |
