This article highlights the dynamic analysis of a proportional valve controlled hydrostatic drive. Such drives are used widely in construction and mining applications. In the drive considered for the analysis, the speed of a bent-axis hydro-motor is controlled by varying flow supplied through a proportional direction controlled valve. A non-linear mathematical model using bond graph simulation technique is developed, where detailed model of the drive system including its loading arrangement is incorporated. From the test results of the pressure-flow characteristics of the valves, its port resistances are identified. Using them and taking into account various losses of the hydro-motor, the drive model is validated through experiments. The verified model is used to study the effects of the perturbations of some critical parameters on the transient responses of the hydrostatic drive through simulation. The proposed model may be useful for initial design of such drive and the development of control systems where these drives are used as actuators.

中文翻译：

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开环比例阀控制静液压驱动的动力学分析

本文重点介绍了比例阀控制的静液压驱动器的动态分析。这种驱动器广泛用于建筑和采矿应用。在用于分析的驱动器中，斜轴液压马达的速度是通过改变通过比例方向控制阀供应的流量来控制的。开发了一种使用键合图模拟技术的非线性数学模型，其中包含了驱动系统的详细模型，包括其负载布置。根据阀门的压力-流量特性的测试结果，确定了其端口阻力。使用它们并考虑到液压马达的各种损耗，通过实验验证驱动模型。验证后的模型用于通过仿真研究一些关键参数的扰动对静液压驱动瞬态响应的影响。所提出的模型可用于此类驱动器的初始设计以及将这些驱动器用作执行器的控制系统的开发。