Project Team
Students
Jonathan Mathews
Aerospace Engineering
Penn State Abington
Faculty Mentors
Masataka Okutsu
Penn State Abington
Engineering
Sven Bilén
Penn State University Park
School of Engineering Design, Technology, and Professional Programs
Project
Project Video
Project Abstract
The objective of the project is to validate a technique to measure vibrations of a rocket using inexpensive consumer-grade electronics. To demonstrate the feasibility of the approach, LSM6DSO accelerometer was attached to a bone-condition speaker (which was set to vibrate at representative range of frequencies), and the acceleration data were collected using ESP32 microcontroller via I2C protocol. While the frequencies of interest are under 500 Hz, the challenge comes from the fact that vibration of rocket would also contain frequencies as high as 2 kHz. To help achieve this goal, the acceleration data were first recorded in an array until the buffer is full, and then written on a SD card in a batch. The demonstrated sampling rates were 1.6 kHz when the three axes of accelerometer was recorded, and 4.8 kHz when only one axis is recorded. Our sample tests (with one axis) show that the Fast Fourier Transform (FFT) could capture combinations of vibration frequencies up to 2.2 kHz.
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