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首页> 外文期刊>Sensors and Actuators, A. Physical >Dynamic pressure generator for dynamic calibrations at different average pressures based on a double-acting pneumatic actuator
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Dynamic pressure generator for dynamic calibrations at different average pressures based on a double-acting pneumatic actuator

机译：动态压力发生器，基于双作用气动执行器，可在不同的平均压力下进行动态校准

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摘要

The ability to conduct dynamic calibrations of pressure sensors at different average pressures is very important because the dynamic properties of pressure sensors also depend on the value of the average pressure during the pressure pulsations. The main limitation of periodic dynamic pressure generators is the difficulty in achieving sinusoidal pulsations at higher amplitudes and frequencies in a gaseous medium due to the nonlinearities that result from the physical gas dynamics. This paper presents a newly developed dynamic pressure generator based on a double-acting pneumatic actuator in which the piston is driven by an electrodynamic shaker. In order to minimize the static preload of the shaker, which is due to the pressure acting on the piston, and therefore to enable the generation of larger pressure pulsations at different average pressures with the same excitation force, the cylinder chambers above and below the piston are pressurized with the same initial static gas pressure. As the dynamic characteristics of the dynamic pressure generator are also defined by the properties of the piston and both the cylinder chambers, the actuator dimensions were optimized with the help of mathematical modeling. In order to demonstrate the capabilities and limitations of the developed dynamic pressure generator, both mathematical and experimental analyses were performed. (C) 2016 Elsevier B.V. All rights reserved.
机译：在不同的平均压力下进行压力传感器动态校准的能力非常重要，因为压力传感器的动态特性还取决于压力脉动期间的平均压力值。周期性动态压力发生器的主要局限性在于，由于物理气体动力学产生的非线性，很难在气态介质中以较高的振幅和频率实现正弦脉动。本文介绍了一种新开发的基于双作用气动执行器的动压发生器，其中活塞由电动振动器驱动。为了使振动器的静态预紧力最小化，这是由于作用在活塞上的压力所致，因此，在相同的激励力下，在不同的平均压力下能够产生更大的压力脉动，在活塞上方和下方的气缸腔以相同的初始静态气压加压。由于动压发生器的动特性也由活塞和两个气缸腔的特性来定义，因此在数学建模的帮助下优化了执行器的尺寸。为了证明开发的动态压力发生器的功能和局限性，进行了数学和实验分析。 （C）2016 Elsevier B.V.保留所有权利。

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