液驱混合动力车辆液压系统建模及仿真  

Modeling and Simulation on Hydraulic System of Hydraulic Hybrid Vehicles

作　　者：张庆永[1] 常思勤[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《南京理工大学学报》2008年第6期701-706,共6页Journal of Nanjing University of Science and Technology

基　　金：江苏省"六大人才"高峰资助项目(04-D-16)

摘　　要：为了分析液驱混合动力车辆的动态特性并优化液压系统的主要设计参数,建立了液压系统双向变量马达、液压蓄能器及其它主要元件的数学模型,定义了气囊式液压蓄能器的多变指数和气体体积变化率之间的关系。完成了液压系统动态仿真计算,采用BCS-GEAR算法和开关状态来解决仿真过程中出现的不稳定现象。对所得的仿真计算结果进行了分析。在相同的初始条件和控制方法下,在自行研制的实验装置上进行了验证性实验。对负载转速响应和液压系统压力进行比较,仿真结果与实验结果相吻合,证明了系统模型和仿真算法的正确性。To analyze the dynamic performance of hydraulic hybrid vehicles and to optimize the main design parameters of the hydraulic system, the mathematical models of the hydraulic system are established, which includes bidirectional variable-displacement motor, hydraulic accumulator and other components. The relation between polytropic exponent of bladder accumulator and variation rate of gas volume is defined. The hydraulic system is simulated. BCS-GEAR algorithm and switch states are applied to solve the unsteady phenomenon of the simulation process. The simulation results are analyzed. In the same initial conditions and controlling algorithm, experimental verification is performed on the self-developed test bed. The speed response of load and pressure of the hydraulic system are compared. The simulation results accords with the experimental data well. The accuracy of systematic models and simulation algorithm is proven.

关 键 词：液驱混合动力车辆 液压系统 动态特性 建模 仿真 

分 类 号：U463.22[机械工程—车辆工程]