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Frequency response of 2D digital servo valve

机译:二维数字伺服阀的频率响应

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A 2D digital servo valve is composed of a 2D servo valve and an embedded controller. The 2D servo valve is virtually a pilot control valve, designed by using both rotary and linear motions of a single spool. The rotary motion of the spool is actuated by a synchronous servo motor. Apart from the mechanical part, the performance of the digital servo valve is also highly dependent upon control strategy of the valve. It is fulfilled by the embedded controller, which is a specially designed microcomputer system with TMS320F2812 as CPU. In this paper, the design philosophy and control strategy of the 2D digital servo valve are first introduced and the key structure parameters affecting the static and dynamic characteristics of the 2D digital servo valve are analyzed, Secondly, utilizing the theories of fluid power dynamics and electromagnetics, the mathematic model of the 2D digital valve is established. The frequency response of the 2D digital servo valve is experimentally measured. Experimental results show that the 2D digital servo valve has a fairly fast response speed, and the bandwidth is about 100 Hz at -3dB gain for 25% input signal.
机译:2D数字伺服阀由2D伺服阀和嵌入式控制器组成。 2D伺服阀实际上是先导控制阀,通过使用单个阀芯的旋转和线性运动来设计。阀芯的旋转运动由同步伺服电机驱动。除了机械部分,数字伺服阀的性能还高度依赖于阀的控制策略。它由嵌入式控制器实现,嵌入式控制器是专门设计的以TMS320F2812为CPU的微型计算机系统。本文首先介绍了二维数字伺服阀的设计原理和控制策略,分析了影响二维数字伺服阀静态和动态特性的关键结构参数,其次利用流体动力动力学和电磁学理论,建立了二维数字阀的数学模型。通过实验测量2D数字伺服阀的频率响应。实验结果表明,二维数字伺服阀响应速度相当快,对于25%的输入信号,在-3dB增益下带宽约为100 Hz。

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