单电感多输出变换器研究

文章提出了一种适用于便携式设备的多路输出变换器。该变换器采用单个电感即可实现非隔离的多路正负电压输出,详细介绍了该变换器的工作原理及其占空比的控制方式,研究了该变换器存在的交叉调节问题,提出了改善交叉调节的控制方法。在此基础上论述了两种衍生电路,提高了电路的应用性能。文中利用Pspice和Matlab对该变换器的工作原理进行了仿真验证。     

基于混合建模技术的复合肥养分含量MIMO软测量模型

In compound fertilizer production, several quality variables need to be monitored and controlled simultaneously. It is very diifficult to measure these variables on-line by existing instruments and sensors. So, soft-sensor technique becomes an indispensable method to implement real-time quality control. In this article, a new model of multi-inputs multi-outputs （MIMO） soft-sensor, which is constructed based on hybrid modeling technique, is proposed for these interactional variables. Data-driven modeling method and simplified first principle modelingmethod are combined in this model. Data-driven modeling method based on limited memory partial least squares（LM-PLS） al.gorithm is used to build soft-senor models for some secondary variables.then, the simplified first principle model is used to compute three primary variables on line. The proposed model has been used in practicalprocess; the results indicate that the proposed model is precise and efficient, and it is possible to realize on line quality control for compound fertilizer process.     

基于混合建模技术的复合肥养分含量MIMO软测量模型

In compound fertilizer production, several quality variables need to be monitored and controlled simultaneously. It is very difficult to measure these variables on-line by existing instruments and sensors. So, soft-sensor technique becomes an indispensable method to implement real-time quality control. In this article, a new model of multi-inputs multi-outputs (MIMO) soft-sensor, which is constructed based on hybrid modeling technique, is proposed for these interactional variables. Data-driven modeling method and simplified first principle modeling method are combined in this model. Data-driven modeling method based on limited memory partial least squares (LM-PLS) algorithm is used to build soft-senor models for some secondary variables; then, the simplified first principle model is used to compute three primary variables on line. The proposed model has been used in practical process; the results indicate that the proposed model is precise and efficient, and it is possible to realize on line quality control for compound fertilizer process.     

单电感多输出变换器研究

本文提出了一种适用于便携式设备的多路输出变换器,该变换器采用单个电感即可实现非隔离的多路正负电压输出。文中详细介绍了该变换器的工作原理及其占空比的控制方式,研究了该变换器存在的交叉调节问题,提出了改善交叉调节的控制方法。在此基础上提出了两种衍生电路,提高了电路的应用性能。文中利用PSpice和Matlab对该变换器的工作原理进行了仿真验证。