Semi-empirical model for a hydraulic servo-solenoid valve
Semi-empirical model for a hydraulic servo-solenoid valve
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DOI：
10.1177/095965180221600303
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发表时间：
2002-05
期刊：
影响因子：
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通讯作者：
J. Ferreira;F. G. de Almeida;M. Quintas
中科院分区：
文献类型：
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作者：
J. Ferreira;F. G. de Almeida;M. Quintas
摘要高性能比例阀，也称为伺服电磁阀，现在可以用于以前只能通过伺服阀才能实现的闭环应用。阀芯运动通过专用硬件控制器进行闭环控制，以增强阀门的频率响应，并将一些非线性影响降至最低。由于其较低的成本和维护要求以及不断提高的性能，它们可以在大量应用中与伺服阀竞争。本文介绍了一种新的液压比例滑阀半经验建模方法，用于半实物仿真实验。所开发的模型使用数据表或实验值来拟合模型参数，以再现静态(压力增益、泄漏流量和流量增益)和动态(频率响应)阀特性。阀门的特性分为两部分：静态特性和动态特性。对于静态部分，提出了变方程结构的参数解耦模型和固定方程结构的柔性模型。阀芯动力学由一个速度和加速度有限的二阶非线性系统建模，参数采用优化技术进行调整。
Abstract High-performance proportional valves, also called servo-solenoid valves, can be used today in closed-loop applications that previously were only possible with servo-valves. The valve spool motion is controlled in a closed loop with a dedicated hardware controller that enhances the valve frequency response and minimizes some non-linear effects. Owing to their lower cost and maintenance requirements as well as increasing performance they can compete with servo-valves in a large number of applications. This paper describes a new semi-empirical modelling approach for hydraulic proportional spool valves to be used in hardware-in-the-loop simulation experiments. The developed models use either data sheet or experimental values to fit the model parameters in order to reproduce both static (pressure gain, leakage flowrate and flow gain) and dynamic (frequency response) valve characteristics. Valve behaviour is divided into two parts: the static behaviour and the dynamic behaviour. A parameter decoupled model, with a variable equation structure, and a flexible model, with a fixed equation structure, are proposed for the static part. Spool dynamics are modelled by a non-linear second-order system, with limited velocity and acceleration, the parameters being adjusted using optimization techniques.