Modeling and application research of absolute gravimeter driven by a V-shaped linear ultrasonic motor.

IF 1.3 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
Lifeng Zhou, Hao Xu, Ranran Geng, Zhiyuan Yao
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引用次数: 0

Abstract

A V-shaped linear ultrasonic motor (LUSM), used as a driving element for the absolute gravimeter, generates structural vibrations when the motor starts and stops, which interfere with and influence the accurate measurement of the absolute gravimeter. In order to address this problem and provide better stability and measurement accuracy, this paper designs a fuzzy proportional integral differential (PID) controller and realizes the drive control of the motor on a field programmable gate array (FPGA) using the Verilog hardware description language (HDL). The advantages of the proposed controller are verified by comparing the simulation results with those of the traditional PID controller. First, the technical index of the LUSM as the driving element is studied through theoretical analysis based on the operation mechanism of the absolute gravimeter. Then, the relationship between the output performance and the input parameters (excitation voltage, preload, and driving frequency) of the motor in a vacuum/natural environment is experimentally investigated. Finally, an experimental system is constructed, and experiments are conducted to measure the acceleration of gravity and compare with the test results of the habitual FG-5 absolute gravimeter. The experimental results show that the output performance of the V-shaped LUSM meets the requirements of the driving element of the absolute gravimeter. The combination of the two control methods can realize the repeatable and stable operation of the system. Moreover, the motor with a mass of only 92 g can output force directly without transmission components. The complexity and the weight of the system are significantly reduced, which has certain advantages.

v型直线超声电机驱动绝对重力仪的建模与应用研究。
v型直线超声电机作为绝对重力仪的驱动元件,在电机启动和停止时产生结构振动,干扰和影响绝对重力仪的精确测量。为了解决这一问题,提供更好的稳定性和测量精度,本文设计了模糊比例积分微分(PID)控制器,并利用Verilog硬件描述语言(HDL)在现场可编程门阵列(FPGA)上实现了电机的驱动控制。通过与传统PID控制器的仿真结果对比,验证了所提控制器的优越性。首先,在绝对重力仪工作机理的基础上,通过理论分析,研究了作为驱动元件的LUSM的技术指标。然后,实验研究了真空/自然环境下电机输出性能与输入参数(激励电压、预载荷和驱动频率)之间的关系。最后,搭建了实验系统,进行了重力加速度测量实验,并与常用FG-5绝对重力仪的测试结果进行了对比。实验结果表明,v型LUSM的输出性能满足绝对重力仪驱动元件的要求。两种控制方法的结合可以实现系统的可重复稳定运行。此外,质量仅为92 g的电机无需传动元件即可直接输出力。大大降低了系统的复杂性和重量,具有一定的优势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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