摘要
针对现实应用过程中DC/DC Boost变换器输出负载的不断变化,需要更高的鲁棒性的问题,提出一种基于脉宽调制的滑模变结构控制器,分析Boost电路在连续导电模式下的工作情况建立其状态空间模型,并据此建立滑模切换面;引入指数趋近律改善其动态性能;理论分析滑模控制的存在条件和稳定性条件;并设计仿真实验对比滑模控制与电压电流双闭环PI控制在负载加载启动、负载突变与输出电压突变的控制效果,试验结果表明与双闭环控制相比,滑模控制拥有更快的响应速度与鲁棒性。
The ever-changing output load of DC/DC Boost converters in real-world applications requires higher robustness.A sliding mode variable structure controller based on pulse width modulation is proposed.The operation of Boost circuit in continuous conductive mode is analyzed and a state space model is established.Based on this,the sliding mode switching surface is established.The exponential approach law is introduced to improve its dynamic performance.The existence conditions and stability conditions of the sliding mode region are theoretical?ly analyzed.And simulations experiment is designed to compare the control effects of sliding mode control and voltage-current double closed-loop PI control on load start-up,load sudden change and output voltage sudden change.The experimental results show that com?pared with the double closed-loop control,the sliding mode control has faster response speed and robustness when the output load is in a wide range.
作者
张鹏翔
陈国初
俞庆
ZHANG Peng-xiang;CHEN Guo-chu;YU Qing(Shanghai Dianji University Electrical Engineering,Shanghai 201306;Shanghai Electric Wind Power Equipment Co.,Ltd.,Shanghai 200241)
出处
《现代计算机》
2019年第25期28-31,95,共5页
Modern Computer
基金
上海市科学技术委员会科研项目：大功率风电机组实时仿真并网试验平台及认证测试技术研究（No.17DZ1201200）
