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首页> 外文期刊>International Journal of Mechanical Engineering Education >Demonstration of vibration control using a compliant parallel arm mechanism
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Demonstration of vibration control using a compliant parallel arm mechanism

机译：使用柔顺平行臂机构的振动控制示范

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摘要

There is still a demand for compact, portable, low-cost laboratory equipment for undergraduate engineering students, since turn-key systems are expensive and require substantial lab space. We propose a novel compliant mechanism demonstrating the fundamentals of vibration control to undergraduate engineering students. The mechanism consists of a translational two-degrees-of-freedom system using initially straight fixed-free flexible beams connected to primary and secondary masses. A linear actuator is connected to the primary mass and two laser displacement sensors are utilized to record displacement of each mass. Primary and secondary mass displacements are controlled by adjusting the forcing frequency while keeping the amplitude constant. All parts of the mechanism are three-dimensional printed to reduce cost. The cost of the device itself is less than $5, and with the actuator and data acquisition the total cost is $1300. The mechanism was demonstrated to 32 undergraduate Machine Dynamics and Vibrations students divided into two course sections. Feedback on the student learning experience was collected using the Student Assessment of Learning Gains survey instrument. Results indicate positive overall feedback, with students highlighting the value of using MATLAB to control the system and analyze results, the connections to real-world applications incorporated into the learning activity, and the hands-on nature of the learning experience.
机译：仍然需要对本科工程学生进行紧凑，便携，低成本的实验室设备，因为转弯系统昂贵，需要实验室空间。我们提出了一种新颖的兼容机制，证明了对本科生工程学生的振动控制的基础。该机制包括使用连接到初级和次要质量的最初直的无固定柔性光束的翻译两度自由度系统。线性致动器连接到主质量，两个激光位移传感器用于记录每个质量的位移。通过在保持幅度常数的同时调整迫使频率来控制初级和二级批量位移。机构的所有部分都是三维印刷，以降低成本。设备本身的成本低于5美元，并且随机和数据采集总成本为1300美元。该机制被证明至32台本科机器动态和振动学生分为两门课程。使用学生评估学习收益调查仪器收集了关于学生学习经验的反馈。结果表明积极的整体反馈，学生突出了使用MATLAB控制系统和分析结果的价值，与现实世界申请的联系在学习活动中，以及学习经验的实践性质。

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