It drew the failure analysis flow sheet of hydraulic axial pump , calculated temperature increase of hydraulic system , and finished the test of hydraulic axial piston double pump . at last . through the discussion about daily maintenance & management methods and repair of hydraulic axial piston pump , it introduced the management system & contents for our corporation 论文结合上述问题，详细介绍了液压系统故障分析方法，液压系统故障分类和故障特性，建立了液压轴向柱塞泵的故障分析流程图，计算液压系统的温升与液压泵功率损耗之间关系，并对工程机械用双朕轴向柱塞泵进行了实验。
In the third chapter , the mathematical models of project system have been established , and simulation has been done on the simulink enviroment of matlab software kits . the simulation focus on the effects of main parameters on the dynamic characteristics of speed control system , and the main parameters include viscosity damp coefficient and friction torque of electrical motor shaft , internal leakage coefficient of pump / motor of hydraulic circuits , gas volume of pressure accumulator , viscosity damp coefficient of cylinder piston and different running building floors , etc . at last , theoretical research effects of the flow and pressure pulsation of pump / motor on car speed and oil volume leakage theory are discussed . the fourth chapter of this thesis concerns the research on the key items about hydraulic power control system according to the ens 1 - 2 and other hydraulic elevator standards 论文第三章针对组成系统的各个模块进行了机理建模，并且通过matlab软件中的simulink图形化仿真环境进行了本课题系统的仿真研究，主要针对影响系统特性的主要参数变化，动态分析系统的输出特性，在上下行工况中，分析了电机轴系粘性阻尼系数、轴系摩擦力矩、主回路蓄能器回路液压泵马达内泄漏系数、蓄能器气体容积、液压缸柱塞粘性阻尼摩擦系数以及不同运行楼层工况等参数对系统特性的影响；最后对轴向柱塞泵马达的流量压力脉动对电梯轿厢速度的影响和蓄能器内油液体积损失机理进行了理论研究。
