Development of Economical Shake Table with Brushed DC Motor and Proportional-Derivative Control

IF 1.9 4区 工程技术 Q3 ENGINEERING, MECHANICAL
B. Parajuli, B. Bhatt, C. K. Kawan
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引用次数: 0

Abstract

Earthquakes pose a significant threat to cities worldwide, necessitating the development of effective and affordable methods to evaluate structural performance under dynamic loading. Although large-scale shake table testing of full structures offers the most accurate approach, the high costs involved make it impractical for many, especially research institutions in developing countries. This study addresses this limitation by developing an affordable, single-degree-of-freedom shake table. The developed shake table is displacement-controlled with a payload capacity of 200 kg, offering a practical solution for testing scaled-down models of real structures. It is powered by a brushed DC motor, which is widely available in developing regions, and utilizes a modified proportional-derivative (PD) control algorithm to simulate both harmonic and real earthquake motions. Using this design, displacements up to ±150 mm and accelerations up to 1g were achieved with acceptable error margins. This paper provides a comprehensive explanation of the shake table’s mechanical design, control algorithm, hardware components, and user interface. It also presents comparisons between theoretical and experimental displacements and accelerations for sine wave and earthquake simulations under various payloads. The results highlight the effectiveness of this low-cost shake table as a viable tool for seismic testing, expanding access to critical structural evaluation in resource-limited settings.

有刷直流电动机及比例导数控制的经济型振动台的研制
地震对世界各地的城市构成了重大威胁,因此需要开发有效且经济的方法来评估结构在动态荷载下的性能。尽管对整个结构进行大型振动台测试提供了最准确的方法,但所涉及的高成本使其对许多人,特别是发展中国家的研究机构来说不切实际。本研究通过开发一种经济实惠的单自由度振动台来解决这一限制。开发的振动台是位移控制的,有效载荷能力为200公斤,为测试实际结构的缩小模型提供了一个实用的解决方案。它由在发展中地区广泛使用的有刷直流电动机提供动力,并利用改进的比例导数(PD)控制算法来模拟谐波和真实地震运动。使用这种设计,位移可达±150mm,加速度可达1g,误差范围可接受。本文对振动台的机械设计、控制算法、硬件组成和用户界面进行了全面的阐述。本文还比较了不同载荷下正弦波和地震模拟的理论和实验位移和加速度。研究结果强调了这种低成本振动台作为一种可行的地震测试工具的有效性,扩大了在资源有限的情况下进行关键结构评估的途径。
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
Experimental Techniques
Experimental Techniques 工程技术-材料科学:表征与测试
CiteScore
3.50
自引率
6.20%
发文量
88
审稿时长
5.2 months
期刊介绍: Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.
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