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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Development of a Direct-Drive Servo Valve With High-Frequency Voice Coil Motor and Advanced Digital Controller
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Development of a Direct-Drive Servo Valve With High-Frequency Voice Coil Motor and Advanced Digital Controller

机译：带有高频音圈电机和高级数字控制器的直驱伺服阀的开发

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摘要

There is increasing demand for the hydraulic direct-drive valve (DDV) due to its higher reliability than conventional two-stage servo valves. The objective of this paper is to propose a new DDV with high-frequency voice coil motor (VCM) and advanced digital controller. A permanent magnet Halbach array is employed in the design of VCM to generate high flux density in the air gap, and thus increase force output. Both finite-element analysis and experiments are conducted to validate the performance improvements of VCM. A digital controller based on DSP and field-programmable gate array is developed to control the valve motion. A hybrid controller based on disturbance observer and sliding model control (SMC) scheme with a state-space observer is proposed for the DDV system. The static testing indicates that the discrete-time SMC with unmodeled load compensator improves the control accuracy and robustness of the system. The dynamic response testing indicates that the frequency bandwidth of the system is up to $hbox{450 Hz}$ for $hbox{25%}$ of full stroke. It is higher than existing commercial VCM-DDVs.
机译：由于液压直驱阀（DDV）的可靠性比传统的两级伺服阀更高，因此对它的需求不断增长。本文的目的是提出一种带有高频音圈电机（VCM）和高级数字控制器的新型DDV。 VCM的设计中使用永磁体Halbach阵列在气隙中产生高磁通密度，从而增加力输出。进行了有限元分析和实验，以验证VCM的性能改进。开发了一种基于DSP和现场可编程门阵列的数字控制器来控制阀门的运动。针对DDV系统，提出了一种基于扰动观测器和带有状态空间观测器的滑模控制方案的混合控制器。静态测试表明，带有未建模负载补偿器的离散时间SMC提高了系统的控制精度和鲁棒性。动态响应测试表明，对于整个行程的$ hbox {25％} $，系统的频率带宽高达$ hbox {450 Hz} $。它高于现有的商用VCM-DDV。

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