伺服液压泵的数学建模与动态研究

发布时间：2018-02-03 07:48

本文关键词： 伺服泵 Pro/E Matlab/Simulink 动态响应无阀系统　出处：《东北大学》2011年硕士论文　论文类型：学位论文

【摘要】：在液压系统中面临的主要问题是能量损失较为严重,其原因主要是动力元件与执行元件的功率不匹配和液压油流经各元件的产生的压力损失,该现象在节流调速液压中尤为明显,而本论文所研究的伺服泵能较好的解决上述问题,所以研究伺服泵的响应情况是非常必要的。本文从实际问题出发,以现有的试验设备为基础对伺服泵的工作情况进行了数学模型建立,并利用三维设计软件Pro/E对所研究的液压泵进行实体建模,输入材料属性,计算出所需的参数。最后,利用Matlab/Simulink对逼近的数学模型进行仿真,得出动态响应结果。研究该问题的主要难点在于对其运动过程数学模型的建立,本文主要是根据实际运动状况,从基本方程,流量连续方程,以及力矩平衡方程对其模型进行建立,分别对伺服阀与液压缸之间、液压缸与泵之间建立模型,再通过几何关系将两个传递函数联系起来,形成完整的传递函数。在本文中,还分别对由伺服泵构成的无阀系统和正常的阀控系统的响应情况进行了研究,并在相同的执行件和相同的工作条件下对其响应速度、稳定性进行了比较,整体上了解了泵控系统在控制系统上所占地位。
[Abstract]:The main problem in the hydraulic system is the serious energy loss, which is mainly due to the power mismatch between the power component and the actuator and the pressure loss caused by the hydraulic oil flowing through the components. This phenomenon is especially obvious in throttle speed regulating hydraulic system, and the servo pump studied in this paper can solve the above problems well, so it is very necessary to study the response of servo pump. In this paper, based on the existing test equipment, the mathematical model of the servo pump is established, and the 3D design software Pro/E is used to model the hydraulic pump. Input the material properties and calculate the required parameters. Finally, the approximate mathematical model is simulated by Matlab/Simulink, and the dynamic response results are obtained. The main difficulty of studying this problem is to establish the mathematical model of its motion process. This paper is mainly based on the actual motion state, from the basic equation, the flow continuity equation. And the torque balance equation to establish its model, respectively between the servo valve and hydraulic cylinder, between the hydraulic cylinder and the pump model, and then through the geometric relationship between the two transfer functions together. Form a complete transfer function. In this paper, the response of the valveless system and the normal valve control system made up of servo pump are studied respectively, and the response speed of the system is also studied under the same operating conditions and the same actuators. The stability of the pump control system is compared and the position of the pump control system in the control system is understood.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.51

【相似文献】