Characteristic analysis of hydraulic hybrid vehicle based on limit cycle  

作　　者：CHEN YanLi LIU ShunAn SHANG Tao ZHANG YuanKun 

机构地区：[1]College of Mechanical Science and Engineering,Jilin University,Changchun 130022,China [2]Faculty of Engineering,University of Wollongong,Wollongong NSW 2522,Australia

出　　处：《Science China(Technological Sciences)》2012年第4期1031-1036,共6页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50475011)

摘　　要：The theory of limit cycles was applied to hydraulic hybrid vehicle (HHV) to analyze the dynamic characteristics of the system. The exact mathematical models based on configuration diagram of HHV were built to study on equilibrium points, nonexistence of limit cycle and stability of equilibrium points. The analysis showed that if the Young's modulus of fluid is neglected, the equilibrium points of the system will be distributed on both sides of the initial function. In addition, there is a unique equilibrium point according to the practical signification of the system parameters. The nonexistence analysis showed that there is no limit cycle for the system, no matter how the viscosity coefficient B changes. The stability analysis of equilibrium points showed that the system is asymptotically stable about the equilibrium point at B≥0 and the equilibrium point is the center point of the system at B=0. Finally, the phase diagrams of global topological structure of HHV system were entirely described according to qualitative analysis of the singular points at infinity.

关 键 词：automotive engineering hydraulic hybrid vehicle limit cycle global structure 

分 类 号：O175.12[理学—数学] U469.7[理学—基础数学]