Location
Havener Center, St. Pat's Ballroom C
Presentation Date
April 21, 2023, 12:40pm - 1:40pm
Session
Session 2
Description
Broadband acoustic ventilation barrier, which can simultaneously block acoustic transmission and maintain ventilation of air flow, promotes potential air-permeable yet sound-proofing applications in green buildings. Emerging microperforated cylindrical tube has demonstrated broadband acoustic attenuation, especially in the low frequency range, as well as sufficient ventilation, which is enabled by micron-scale perforations over the entire surface of cylindrical shell. Therefore, precise manufacturing technology is desirably demanded to fabricate microperforated cylindrical tubes at large scale and economically. In this project, we develop a synchronization assistant control (SAC) system that is integrated with a computer numerical control (CNC) drilling system for continuous fabrication of microperforated cylindrical tubes. The SAC system consists of an Arduino microprocesses and a stepper motor to synchronize rotation of the tube corresponding to progress of CNC drilling along the axial direction of tube. Two manual transitional stages are applied to accurately align the center position of drill bit if any drill bit is replaced. Taking advantages of CNC precision drilling, SAC synchronized rotation control as well as accurate alignment of drill bits, the microperforated cylindrical tube can be fabricated in a continuous, automatic, and reliable manner.
Meeting Name
32nd Annual Spring Meeting of the NASA-Mo Space Grant Consortium
Document Type
Presentation
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 The Authors, all rights reserved.
Precise, scalable, and low-cost manufacturing of microperforated cylindrical tube as a broadband acoustic ventilation barrier
Havener Center, St. Pat's Ballroom C
Broadband acoustic ventilation barrier, which can simultaneously block acoustic transmission and maintain ventilation of air flow, promotes potential air-permeable yet sound-proofing applications in green buildings. Emerging microperforated cylindrical tube has demonstrated broadband acoustic attenuation, especially in the low frequency range, as well as sufficient ventilation, which is enabled by micron-scale perforations over the entire surface of cylindrical shell. Therefore, precise manufacturing technology is desirably demanded to fabricate microperforated cylindrical tubes at large scale and economically. In this project, we develop a synchronization assistant control (SAC) system that is integrated with a computer numerical control (CNC) drilling system for continuous fabrication of microperforated cylindrical tubes. The SAC system consists of an Arduino microprocesses and a stepper motor to synchronize rotation of the tube corresponding to progress of CNC drilling along the axial direction of tube. Two manual transitional stages are applied to accurately align the center position of drill bit if any drill bit is replaced. Taking advantages of CNC precision drilling, SAC synchronized rotation control as well as accurate alignment of drill bits, the microperforated cylindrical tube can be fabricated in a continuous, automatic, and reliable manner.
