中高压液压缸实验台液压系统仿真及优化

针对目前液压缸实验台存在不足,把非对称阀控制非对称液压缸这一思想应用于系统设计中,建立了非功率回收方式的液压缸实验台。采用功率键合图法建立了该液压系统动态特性数学模型。利用变步长的Runge-Kutta法探讨了管径、负载等参数对液压系统动态特性的影响规律。通过Laplace-Itae建立了寻优准则,并利用ODE变换法对其仿真模型进行了参数优化。研究结果表明,把功率键合图法与ODE转换法结合起来对液压系统进行动态特性仿真,既能全面地包含系统中各元件的动态效应,又可以减少计算量和计算时间。

Simulation and Parameter Optimization of Test Platform Hydraulic System Based on Mesohigh Cylinder

In order to overcome the limitation of the present test platform of hydraulic cylinder, a new test platform scheme was proposed by applying an asymmetric electromagnetism valve to hydraulic system of no reclaimed power, and the valve is used to control an asymmetric hydraulic cylinder. The dynamic mathematic model of the hydraulic system was built by means of power bond graphs. Influence of primary technology parameters of the hydraulic system on the dynamic characteristics of the system was expounded using Runge-Kutta method. Optimization criterion was proposed by Laplace-Itae and some primary parameters were optimized by means of the ODE converter technique. The results show that the dynamic effect of every element can be embodied and the calculational workload and the computing time are reduced dramatically.