Electro-hydraulic servo valve is a typical complicated multi-domain system constituted by mechanical, electric, hydraulic and magnetic components, which is widely used in electro-hydraulic servo systems such as constr...Electro-hydraulic servo valve is a typical complicated multi-domain system constituted by mechanical, electric, hydraulic and magnetic components, which is widely used in electro-hydraulic servo systems such as construction machinery, heavy equipment, weapon and so forth. The traditional method of modeling and simulation of servo valve is based on block diagram or signal flow, which cannot describe the servo valve system from components level nor be used in modeling and simulation of overall servo systems. In the procedure of traditional method, computational causality must be involved in modeling of servo valve, which is inconvenient to execute modification on components or parameters. Modelica is an object-oriented modeling language which is suited for large, complex, heterogeneous and multi-domain systems. The key features of Modelica are multi-domain, object-oriented and non-causal, which are suitable for modeling of servo valve and make the model readable, reusable, and easy to modify. The simulation results show similar curves with traditional method. This new servo valve modeling and simulation method can provide the engineers a more efficient way to design and optimize a servo valve and an overall servo system.展开更多
为提高光伏发电的效率,利用最大功率点跟踪(Maximum Power Point Tracking,MPPT)算法可以有效地使光伏电池工作在最大功率点处。目前通常使用MATLAB/Simulink软件对MPPT算法进行仿真分析,本文利用国产软件MWorks完全替代MATLAB/Simulin...为提高光伏发电的效率,利用最大功率点跟踪(Maximum Power Point Tracking,MPPT)算法可以有效地使光伏电池工作在最大功率点处。目前通常使用MATLAB/Simulink软件对MPPT算法进行仿真分析,本文利用国产软件MWorks完全替代MATLAB/Simulink对电导增量法MPPT算法进行了建模与仿真,仿真结果表明,在光照强度或环境温度发生变化时,MWorks软件搭建的仿真模型可以快速响应变化,能够确保光伏电池在光照强度和环境温度变化的情况下始终输出最大功率,仿真结果验证了MPPT算法在国产MWorks软件上仿真的可行性,为电力电子系统的仿真验证提供一种新的思路。展开更多
基金supported by the National High Technology Research and Development Foundation of China(2009AA044501)the National Basic Research Program of China (2011CB706502)
文摘Electro-hydraulic servo valve is a typical complicated multi-domain system constituted by mechanical, electric, hydraulic and magnetic components, which is widely used in electro-hydraulic servo systems such as construction machinery, heavy equipment, weapon and so forth. The traditional method of modeling and simulation of servo valve is based on block diagram or signal flow, which cannot describe the servo valve system from components level nor be used in modeling and simulation of overall servo systems. In the procedure of traditional method, computational causality must be involved in modeling of servo valve, which is inconvenient to execute modification on components or parameters. Modelica is an object-oriented modeling language which is suited for large, complex, heterogeneous and multi-domain systems. The key features of Modelica are multi-domain, object-oriented and non-causal, which are suitable for modeling of servo valve and make the model readable, reusable, and easy to modify. The simulation results show similar curves with traditional method. This new servo valve modeling and simulation method can provide the engineers a more efficient way to design and optimize a servo valve and an overall servo system.
文摘为提高光伏发电的效率,利用最大功率点跟踪(Maximum Power Point Tracking,MPPT)算法可以有效地使光伏电池工作在最大功率点处。目前通常使用MATLAB/Simulink软件对MPPT算法进行仿真分析,本文利用国产软件MWorks完全替代MATLAB/Simulink对电导增量法MPPT算法进行了建模与仿真,仿真结果表明,在光照强度或环境温度发生变化时,MWorks软件搭建的仿真模型可以快速响应变化,能够确保光伏电池在光照强度和环境温度变化的情况下始终输出最大功率,仿真结果验证了MPPT算法在国产MWorks软件上仿真的可行性,为电力电子系统的仿真验证提供一种新的思路。
