Based on the control scheme of force and position, the controlling andtesting system of metal V-belt type CVT is developed. Having taken account of the complex nonlinearcharacteristics of the CVT shift dynamics and th...Based on the control scheme of force and position, the controlling andtesting system of metal V-belt type CVT is developed. Having taken account of the complex nonlinearcharacteristics of the CVT shift dynamics and the saturation and nonlinear characteristics of thespeed ratio control valve, the speed ratio fuzzy controller based on the speed ratio feedback isdesigned. The experiment results show that the developed speed ratio control system is practical andfeasible.展开更多
The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Matrix C...The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Matrix Converter (MC) to transfer the slip energy of the rotor into the mains instead of using cascaded ac-dc-ac converter whilst the stator side is fixed to the grid. Operation at both sub-synchronous and super-synchronous regions is possible with the proposed drive system. The different level control strategies for maximum power point tracking and active-reactive power are discussed. Simulation results of the proposed doubly fed induction generator drive system show the good performance of the control system strategy for both transient and steadystate conditions.展开更多
提出了一种基于改进粒子群优化算法的无级变速器速比控制阀动态性能优化方法。首先通过机理分析的方法建立了速比控制阀的动态模型;然后根据无级变速器速比控制阀的使用要求,在考虑响应时间、超调量及节能等指标的基础上,确立了一个综...提出了一种基于改进粒子群优化算法的无级变速器速比控制阀动态性能优化方法。首先通过机理分析的方法建立了速比控制阀的动态模型;然后根据无级变速器速比控制阀的使用要求,在考虑响应时间、超调量及节能等指标的基础上,确立了一个综合的优化目标函数;最后根据确立的目标函数,结合仿真模型,通过改进的粒子群优化算法对速比控制阀的结构参数进行了优化。试验结果表明经过优化的速比控制阀各项动态性能指标均优于原型阀,其中压力上升时间缩短了100 m s,超调量下降了0.05 MPa,更适用于无级变速器。展开更多
基金This project is supported by National Natural Science Foundation of China(No.50005026)Visiting Scholar Foundation of State Key Laboratory ofMechanical Transmission in Chongqing University, China.
文摘Based on the control scheme of force and position, the controlling andtesting system of metal V-belt type CVT is developed. Having taken account of the complex nonlinearcharacteristics of the CVT shift dynamics and the saturation and nonlinear characteristics of thespeed ratio control valve, the speed ratio fuzzy controller based on the speed ratio feedback isdesigned. The experiment results show that the developed speed ratio control system is practical andfeasible.
文摘The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Matrix Converter (MC) to transfer the slip energy of the rotor into the mains instead of using cascaded ac-dc-ac converter whilst the stator side is fixed to the grid. Operation at both sub-synchronous and super-synchronous regions is possible with the proposed drive system. The different level control strategies for maximum power point tracking and active-reactive power are discussed. Simulation results of the proposed doubly fed induction generator drive system show the good performance of the control system strategy for both transient and steadystate conditions.
文摘提出了一种基于改进粒子群优化算法的无级变速器速比控制阀动态性能优化方法。首先通过机理分析的方法建立了速比控制阀的动态模型;然后根据无级变速器速比控制阀的使用要求,在考虑响应时间、超调量及节能等指标的基础上,确立了一个综合的优化目标函数;最后根据确立的目标函数,结合仿真模型,通过改进的粒子群优化算法对速比控制阀的结构参数进行了优化。试验结果表明经过优化的速比控制阀各项动态性能指标均优于原型阀,其中压力上升时间缩短了100 m s,超调量下降了0.05 MPa,更适用于无级变速器。
